Meo Class IV Orals Ques Bank - Mumbai Mmd

MEO CLASS IV ORAL QUESTIONS - MMD MUMBAI

Compiled by: WASIM HUSSAIN N https://www.facebook.com/en.wasim

FN-3 COSCOPOOL - FPFF/FFA F1 F2 F3 F4 F5 F6 F7 F8 F9 F10 F11 F12 F13 F14 F15 F16

Foam fire fighting system(quantity,ration,line,requirements) What will you do if all the foam is used in one go ? (what for next time ? How you will prepare onboard?) Different fire fighting mediums What is the procedure followed to enter CO2 room? (Lots of cross questions on this)

Barik

Draw deck seal on your ship and also draw if any alarms or trips on it. CO2 system explain with diagram? Why isolating valve provided in the manifold? What all are the safeties? Types of detectors on board Is there a safety valve on fire main? Isolation valves on fire main; it's use if fire on main deck n E/R? What basic check do you think you should do while entering CO2 room? On an oil tanker fixed fire fighting system on-board. On deck what type of system you use? Why only low expansion foam? Why not high expansion foam? And where high expansion foam is used? Hyper mist system. From where do you maintain water supply to Hypermist system? Fire detectors, fire extinguisher/fixed types. Draw the hyper mist system What are fire fighting system for boiler? What is size of foam extinguisher?

Barik

Barik Barik Barik

Barik/Dastur Bhalla -Shirish Bhalla -Shirish Bhalla -Shirish Bhalla -Shirish Kamath Kamath Kamath Kamath Kamath Majumdar/Singh

F17 CO2 system weekly checks F18 Draw CO2 portable extinguisher. Its safeties? How it works? F19 Draw mechanical foam system & explain with all its content

Mishra

F20 Ship coming out of dry dock after major changes in fire system. You join the ship and how

Narain

will you come to know? F21 How will you calculate no. of CO2 bottles for engine room? F22 Safeties in Fixed CO2 system and in CO2 room. Draw CO2 cabinet alarm ckt diagram.

Narain/Saini

Mishra Mishra

Piplani

F23 Fixed fire fighting in deck and E/R? F24 Deck fire fighting arrangement on LPG.

Piplani

F25 Halon system and some other details. When it is going to be eliminated? Principle

Sharma

F26 F27 F28 F29

Sharma

involved - how exactly it extinguishes fire (breaking chain reaction) If fire in engine room and decided to release CO2, what action will you take before release? CO2 flooding system: safeties prior to entry of CO2 room Fixed CO2 System Which extinguishing medium for deck? Draw foam system entire line for deck and ER. Foam expansion ratios?

FN 3 ‐ COCSOPOOL ‐ FPFF/FFA

Singh (ventilation should be on, room temp to be maintained below 55 deg C)


Singh Subramanian Subramanian

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MEO CLASS IV ORAL QUESTIONS - MMD MUMBAI F30 What will happen if fire main deck line is cracked and u want water in fire hydrants on

deck.?


Cracked fire main lines is major non-conformity, psc detention. Repair, renew the pipeline as soon as possible. Notify flag state, company, supdt. That such non-conformity was found during inspections. Class is to be informed about it. If temporary measures are taken, a condition of class is issued for 3 months to 5 years depending upon whether the work can be carried out during operation of ship or emcy dry dock or in drydock. When permanent repairs are carried out, class again to be informed, class surveyor will inspect the repairs, testing to be done , satisfactory completion, coc will be removed. Temporary repairs can be done for fire fighting purpose but notify all parties the intention of it.

Trassi

F31 How will you ascertain 85% CO2 has been discharged within 2 minutes?

Trassi

F32 Hazards on tanker? F33 FFS for deck on your ship and lot of cross questions on that F34 DRAW FIRE LINE OF YOUR SHIP (WITH ALL ACCESSORIES)

Trassi

F35 Explain fixed foam system F36 What is the pressure setting of relief valve in CO2 fixed fire extinguishing system? What

Vinod

F37 F38 F39 F40 F41 F42 F43 F44

Trassi TRASSI's Fav

safety are provided in case if CO2 room itself is under fire? After CO2 release from where will you enter in the engine room ? How many entrances are there in the engine room ? Fire on ME cylinder head - How to estinguish and type of extinguisher? Fire fighting in paint locker? At what interval portable fire extinguisher is refilled and pr. Tested. Why CO2 stored at 53 bar? On what principle does DCP extingushes fire? Sketch and explain DCP, portable extinguisher. Standard FireTest?

xyz xyz xyz xyz

Standard fire test means a test in which specimens are exposed in a test furnace to temperatures corresponding approximately to the standard time-temperature curve.

F45 Sustained Flaming?

Sustained flaming means a presence of flames on or over any part of a specimen lasting 5 s or longer.

F46 NON-COMBUSTIBILITY TEST

ACCEPTANCE CRITERIA OF NON-COMBUSTIBILITY Materials to be classified as non-combustible shall satisfy the following criteria: .1 the average furnace thermocouple temperature rise as calculated in paragraphs 8.4 and 8.5 of the appendix does not exceed 30°C; .2 the average specimen surface thermocouple temperature rise as calculated in paragraphs 8.4 and 8.5 of the appendix does not exceed 30°C; .3 the average duration of sustained flaming as calculated in paragraph 8.3 of the appendix does not exceed 10 s; and .4 the average mass loss as calculated in paragraph 8.2 of the appendix does not exceed 50%.

F47 In hyper mist system how 11 bar(Pres of pump is confirmed) pump generates a fine mist? Wasim Hussain N Diffuser action at nozzle, drop in the pressure at nozzle throat and thus breaking of the liquid particles Surveyor asked the speciality of nozzle?



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FN 3 COSCOPOOL - LSA L1 What is EPIRB?how does it activate? HRU?how does it operate?

(it activates automatically when it floats in water & water comes in contact wid sea switch) Iqbal

L2 SART? Location? Any indications where SART is kept? Functioning?

IQBAL - JHA

L3 EPIRB L4 HRU? function? Working principle? Where we use HRU? L5 How will you lower the life boat? Which all checks will you carry out before you lower the life

IQBAL - JHA

L6 L7 L8 L9 L10

IQBAL - JHA Kamath

boat? MOB? Details What is survival craft? Definition as per SOLAS chapter 3. Type of survival craft. Type of life boat

Kamath Kapoor Kapoor Kapoor Kapoor

L11 Lowering of enclosed lifeboat.

Kapoor

L12 What if free-fall lock doesn’t operate?

Kapoor

L13 Regulations of lifeboat

Kapoor

L14 Speciality of Tanker Lifeboats

Sprinkler System, Air Support system

Majumdar/Narain

L15 Where does Air support system take air from? What if the Air from cylinders gets fully

Majumdar/Narain

discharged? L16 Lifeboat - What all we carry in lifeboat?

Mishra

L17 Regulation for the lifeboat engine

Mishra

L18 Weight of the life boat

Mishra

L19 If the life boat engine is not starting what to check?

Mishra

L20 Lifeboat lowering procedure and brief explanation about onload and offload release

Mishra

mechanism. L21 What is MOB marker? How much it weighs? How it differs from other lifebuoys?

Narain/Saini

L22 Immersion suit? How many on board?

Narain/Saini

L23 Automatic life raft launching

Narain/Saini

L24 Lifeboat Lowering- use of main and centrifugal brakes.

Subramanian

L25 Explain auto life raft inflate arrangement. How does HRU works? Which bottles we use to

Subramanian

inflate life raft, how? L26 Life boat DAVIT safeties

Subramanian

L27 How many life rafts on your ship, their location , and capacity of one in fwd?

Trassi



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L28 Launching of liferaft

Vinod

L29 Locations of the EEBD

Vinod

L30 EEBD

Vinod Kumar

L31 LSA on ship

Vinod Kumar

L32 Procedure for lowering of a Life boat

1. Minimum of 5 persons are required to lower the L/B. 2.One person goes inside the L/B and passes the end of toggle painter and plugs the drain. 3. Check all lifeline and falls are clear of L/B. 4. Make fast the other end of toggle painter on a strong point forward of the ship. 5.Remove forward and aft gripes and both person stand by for passing bowing tackle and tricing pendant. 6.Remove harbour safety pin. 7.Make sure the ship’s side is free of everything, no water or garbage is there. 8. Now, one person lift’s the dead mans handle slowly which releases the brake. 9.The boat along with cradle sides downward till it comes to the embarkation deck. 10.By pulling tricing pendant , bring it alongside the embarkation deck. 11.Persons embark inside the boat. 12.Now, tricing pendant is removed and the whole load comes on falls. 13.Now, boat is further lowered with deadman’s handle. 14.As soon as the boat comes around 1meter above the sea-water, it can be released.

L33 Difference between launcing of life raft on side and that of forward life raft? L34 Lifeboat engine regulation, what if engine is not starting in cold countries? L35 What is dead man's handle ? What are it functions ?

Its called dead mans handle because: though during drills bosun lifts up and life boat gets lowered , that is not the only way u can lower lifeboat. There is a wire rope extend thru pulleys and levers in the lifeboat for the same purpose. So considering this, even one person is sufficient to lower this life boat from lifeboat and escape when all other people are dead. Since there is no person lifting the brake handle physically or loaclly but remotely in the lifeboat, it is called dead mans handle.

L36 Lifeboat maintenance L37 How many brakes are there on a life boat winch? L38 Regulation regarding the stowage position of life raft ?



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FN 3 COSCOPOOL - ENVIRONMENT E1

Barik

E8

What do you know about SOx limitations? If you have fuel of only 3.5% sulphur content, is it possible for you to enter SECA area? I told him, exhaust gas cleaning system - he wanted the chemical reaction also.

Barik

E9

Sewage discharge regulation through holding tank, if no approved treatment plant. What is Type1,2,3 tanker? How many annexes are there in MARPOL and explain annex 4 Requirements for incinerator and temperature for different chambers What all you can burn in incinerator? Difference in discharge criteria of Annex I - between Special Area and Outside Special Area MARPOL annexes and which on your ship was following? Regulation regarding bilge discharge Entries to be made in Oil record book? Which annex of MARPOL deals with garbage? Tell the requirements Contents of bunker delivery note. What is Annex 6? New regulations for SOx emmision Greenhouse gases and functions of each MARPOL Annexes 1-6 (as in he wanted the tag line as per marpol) Sewage and garbage discharge regulations Sewage Treatment Plant certificate. MARPOL annexes and accordingly certificates issued. MARPOL equipments. Annex 6 amendment - ECA areas and SOx criteria Requirements of MARPOL BOD, echoliform count calculation & sample test procedure What is the alternative sampling point other dan the bunker manifold drip sampling point in a bunker line?

Barik

How will you reduce Nox? MARPOL new regulations What is EEDI? Why was it not earlier for what is it for? SOx NOx what is presently in use and values

Paul

E3 E4 E5 E6 E7

E10 E11 E12 E13 E14 E77 E78 E15 E16 E17 E18 E19 E20 E21 E22 E23 E24 E25 E26 E27 E28 E29 E30 E31 E32 E33


w

E2

w AE .fa S W M ce / AS bo A IM E ok M H N .c A om G M /e E2 n. w as im

Regulations for pumping out bilges and cargo residues Discharge criteria of Annex 1? What is Annex 2? Categories What is the constructional requirement for carrying category X cargo? What are the requirements to pump out bilges in special area? For which all ships MARPOL Annex 4 applies? How will you transfer bilges - step by step procedure? What all records you record in Oil record book? From where you will get the positions? Why positions are required? How will you come to know that you are not in special area?


Barik Barik Barik Barik Barik Barik

Barik Barik/Dastoor Barik/Neti Barik/Neti Barik/Subramanian Bhalla/Shirish Bhalla/Shirish Iqbal Iqbal Iqbal IQBAL - JHA IQBAL - JHA IQBAL - JHA Kamath Kamath Kamath Kamath Kamath Kamath Kamath Majumdar Narain

Paul Paul Paul

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MARPOL Annex VI. EEDI n SEEMP. Details. What steps to achieve SEEMP and how to reduce CO2 emission?

Sharma

E35

SOx and NOx regulation, tiers. Reduction methods MARPOL Annex V new amendments MARPOL Annex IV, when in force, discharge criteria Difference b/w 15 ppm critiera of general cargo and tanker Incinerator alarms. New regulations in garbage and Annex VI - wants to know about EEDI What does en route signify Garbage Record book (in depth) Annex 1 discharge Criteria Annex 6 complete EIAPP certificate EEDI & SEEMP Sewage treatment plant, BOD, Garbage New regulations Annex 6 pollutants? What is BDN and what does it contains? Retention period onboard? It comes under which annex? What is MARPOL sample? Retention period? ER bilge pumping regulation? Annex 6 new amendments. NOx limits. Tier 1, 2, 3, what does it signify. Bunker sample. How to take? How long on-board? Where is sulphur content of bunker recorded? ORB/Log Book? If I am PSC can I come and take your ship bunker sample? If no, what is the rule? If yes then where will you log this down that PSC has taken the sample? How to control NOx? What proof it’s under control? If old ships cant comply what they have to do? Annex VI - besides SOx, NOx, particulate matter and air pollution, what is it about? Remove gas from refer/AC? How to do? How does the recovery system comply with Annex VI? BWM Convention - Details AFS Convention - Details Why is emergency steering used? Annex V when it came into force and discharge criteria. Discharge criteria of MARPOL Annex IV. ORB Part I entries. How MARPOL Annex VI complied on ship? Describe Annex IV briefly? Who approves sewage treatment plant, how this regulations are made, what tests are made? What will decide the rate of flow in discharging the sewage OBD?

Sharma

E37 E38 E39 E40 E68 E41 E42 E43 E44 E45 E46 E47 E48 E49 E50 E51 E52 E53 E54 E55 E56 E57 E58 E59 E60 E61 E62 E63 E64 E65 E66 E67


w

E36


E34


Sharma Sharma Sharma Sharma Sharma Shireesh Shirish Kumar Subramanian Subramanian Subramanian Subramanian Subramanian Subramanian Subramanian Subramanian Subramanian Subramanian Subramanian Subramanian Subramanian Subramanian Subramanian Subramanian Subramanian Subramanian Trassi Trassi Trassi Trassi Trassi / Majumdar Vinod Kumar Vinod Kumar xyz

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MEO CLASS IV ORAL QUESTIONS - MMD MUMBAI E69

What are the contents of SOPEP locker and its position?

E70

How many bunker samples taken during bunkering? Why bilge lines are flushed before dry dock entry? Why incinerator exhaust not used as inert gas ? What is the difference between MARPOL Annex I regulations inside and outside special areas? Wht is sweet crude and sour crude ?

E73 E74

E75

Contents of SOPEP SOPEP contains the following things: 1 The action plan contains duty of each crew member at the time of spill, including emergency muster and actions. 2 SOPEP contains the general information about the ship and the owner of the ship etc. 3 Steps and procedure to contain the discharge of oil into the sea using SOPEP equipments. 4 On board Reporting procedure and requirement in case of oil spill is described. 5 Authorities to contact and reporting requirements in case of oil spill are listed in SOPEP. Authorities like port state control, oil clean up team etc are to be notified. 6 SOPEP includes drawing of various fuel lines, along with other oil lines on board vessel with positioning of vents, save all trays etc. 7 General arrangement of ship is also listed in SOPEP, which includes location of all the oil tanks with capacity, content etc. 8 The location of the SOPEP locker and contents of the locker with a list of inventory.


E72

Why MARPOL Annex II is called Regulation for the control of pollution by noxious liquid substances in Bulk. While others Annex are for prevention ?


w

E71



Wasim Hussain N it is H2S Related , a very frequent term in Petroleum industry, H2S less than 25ppm is Sweet and anything more than that is sour , the significance in petroleum industry is with the material properties required in handling and transport equipment for the crude. A pipeline designed for sweet lean gas cannot be used to transport sour gas (or crude for instance)

it is because in this annex, we intentionally discharge the residue of x y & z catagories but only after diluting it to a prescribed value and thus we don't prevent but control the pollution unlike other annexes..

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MEO CLASS IV ORAL QUESTIONS - MMD MUMBAI E76

What is MARPOL LINE?

E79

ODMC working, purpose, regulation


marpol lines r smmal dia lines which r fitted to the cargo line nd connected to strippin pumps for efficient stripping.... thus the cargo residue onboard can b reduced by discharged to port .wen cargo residue is less onboarrd cow washing can b efficiently done which in turn reduces the pollution caused by cargo residues hence it is cald marpol lines

w




Page 4 of 4



FN 3 - COSCOPOOL - SHIP CONSTRUCTION & NAVAL ARCHITECTURE SC1 SC2 SC3 SC4 SC5 SC6 SC7 SC8 SC9 SC10 SC11 SC12 SC13 SC14 SC15 SC16 SC17 SC18 SC19 SC21 SC22 SC23 SC24 SC25 SC26 SC27 SC28 SC29 SC30 SC31 SC32 SC33 SC34 SC35 SC36 SC37 SC38

Different types of keel (function of bilge keel) How is bilge keel attached to hull Why dry dock required Collision bulkhead Why tankers have less freeboard? Electrical safeties in steering gear sys? What do you check in keyless propeller when it is removed in dry dock just after inspection? How will you make sure that it is fitted properly? Which is continuous tank top or bulkhead?? What is special about collision bulkhead and where it is placed? What do you check in keyless propeller when it is removed in dry dock just after inspection? How will you make sure that it is fitted properly? Do you know what is reverse transom stern. Draw its structure. GRT, GT, Deadwt, Tonnage, NT, Lightwt, Displacement, TEU Draw cross section of bulk carrier and explain Load line draw n explain. Duct keel define and give measurements of it. Where it opens up and what is the use of it? Camber, sheer Bilge keel; draw how it is attached to the ship. Are stiffeners used for collision bulkhead? What is the spacing b’n stiffeners? What is apparent slip? Importance of freeboard, and some cross question. Function of floors. What is fresh water allowance, and some cross question. Midship Section of Bulk carrier Angle of Lol and what is GM , at angle of Lol. Plimsoll marking What is Garboard strake, sheer strake, bilge strake? What is buttock line in ship? What are the diagrams on your ship posted in alleyways regarding ships structure and exact Reserve buoyancy

Barik

Lightweight, Deadweight (cross questions). Angle of Loll. What happens when ship rolls now? Watertight Bulkheads its uses, from where to where it extends? What is TEU & FEU? How container is loaded in hold and on top of container. How is locking of container is done. Name of that device. Safeties of deck crane and what all safeties are provided in operator's cabin? What is hose test for cargo hold and how it is done and on which all parts of cargo hold/hatch cover

Kamath

FN 3 ‐ COCSOPOOL ‐ SHIPCO/NAV ARCH


Barik Barik Barik Barik Barik Barik Barik Barik Barik Barik/Dastoor Barik/Narain/Saini Bhalla Bhalla Bhalla/Shirish Bhalla/Shirish Bhalla/Shirish Iqbal Iqbal Iqbal Iqbal Iqbal IQBAL - JHA IQBAL - JHA IQBAL - JHA Kamath Kamath Kamath Kamath

Kamath Kamath Kapoor Kapoor Kapoor Kapoor Kapoor

Page 1 of 5

MEO CLASS IV ORAL QUESTIONS - MMD MUMBAI SC39 SC40 SC41 SC42 SC43 SC44 SC45 SC46 SC47 SC48 SC49 SC50 SC51 SC52 SC53 SC54 SC55 SC56 SC57 SC58 SC59 SC60 SC61 SC20 SC62 SC63 SC64 SC65 SC66 SC67 SC68 SC69 SC70 SC71 SC72 SC73

Compiled by: WASIM HUSSAIN N https://www.facebook.com/en.wasim Kapoor / Mishra

Torsion box. Diagram and purpose. What is torsion box? All the details with diagram and cross questions What is Metacentric Height? What is the effect of large / small Metacentric Height? How where to calculate rudder drop using trammel guage and propeller drop using poker guage? GRT, NRT, DWT, LWT & Calculation What is function of Bilge Keel? What is length and width of Bilge Keel on your ship? What are other means of damping the rolling of ship? Rudder Construction GZ and GM curves, explain stability in it, at what angle will vessel lose its stability? Draw cargo hold & show all components & attachments Garboard strake, freeing port? Safeties provided on sounding pipe Draw and explain construction of double bottom tank. Show all frames used Corrugated bulkheads and what advantages over normal bulkheads? Forces acting on fwd part of ship in heavy weather? What is bulbous bow? Whether it is solid or Types of stabilizers

Majumdar Rudder drop: trammel gauge. Its an L shaped or sometimes C shaped or

Majumdar Majumdar/Barik Majumdar/Narain Majumdar/Narain Mishra Mishra Mishra Narain/Saini Narain/Tambvekar Piplani Piplani Piplani Piplani/Kamat

Definition - hawse pipe, spurling pipe, sole piece What type of crane on deck ? Various types of keel? Explain duct keel in detail? Define deadweight Free surface effect. How to reduce in tankers and in bulk carriers? What are the processes? Terms Difference b/w cargo and passenger ship

Piplani/Kamat

What is floors? Where are they located? There types? Pounding and Panting? Discuss in details. Explain the arrangement in fwd part of ship’s structure to counteract the same. Inclining experiment? What is inclining angle? (Cross questions)

Sharma

How do calculate freeboard? What is free surface effect and in which ship? xQs Where is bulbow bow and what's that for ? Have to explain no drawing? Collision Bulkhead: location and function Stable and Unstable Ship with diagram How keyless propellers doesn’t slip, what principle? Draw the mid-section of bulk carrier. Lots of cross question regarding framing, floors, use of hopper tanks? Strengthening of rudder. Where is load taken? Draw load lines. Significance. Aft end arrangement drawing with provision to show strengthening for taking the rudder weight. How is propeller fitting done? Procedure? How is it secured? The nut name? Draw shafting and propeller diagram


S Narain Saini Sharma Sharma Sharma

Sharma/Mishra Shirish / Iqbal http://www.marinewiki.org/index.php?title=Freeboard_calculation


Shirish Kumar Shirish Kumar Shirish Kumar Singh Singh Subramanian Subramanian Subramanian Subramanian Subramanian Subramanian Subramanian

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MEO CLASS IV ORAL QUESTIONS - MMD MUMBAI SC74 SC75 SC76 SC77 SC78 SC79 SC80 SC81 SC82 SC83 SC84 SC85 SC86 SC87 SC88 SC89 SC90 SC91 SC92 SC93 SC94 SC95 SC96 SC97 SC98 SC99

Panting? Draw panting region. All the stiffeners names. Drawing of shell plating in NA – What is that drawing called? Draw quick closing valve and explain the mechanism What is Aframax, Panamax, Suezmax, Kamsarmax? What is being done to Panama Canal presently? Free surface effect If the hatch cover is closed, how will you know hatch cover is not leaking?

Compiled by: WASIM HUSSAIN N https://www.facebook.com/en.wasim Subramanian Subramanian Tambvekar Trassi Trassi

Hose test. Condition of hatch cover seals. Inspection of all coamings and receses where seals fit tightly.

TRASSI

At what pressure bulk carrier cargo hold is tested for its integrity.? Which type of windlass onboard? Which type of windlass pump and what is the motor rating? Type of starter? Load line curve What is gunwale? What is Camber? What are the types of floors? In double bottoms what arrangement is provided to subdivide the tanks e. g. (db tk1, db tk2, db tk3 etc.)? Transverse bulkhead diagram Transverse bulkhead oil tanker draw it Draw fwd and aft part of ship Type of keels and draw bilge keel. Types of keel? Cross section of bilge keel. What are the dimensions of bilge (plate/keel)? What difference between product tanker and crude carrier? Deck crane - if it rotates 360 degrees then how the flexible hydraulic hose does not gets entangled? hydraulic unit with power pack and motor all located in upper slewing post

TRASSI

How will you make sure if hatch covers are seal tight? Which test? Explain fire hose test? If GZ is more, what does it indicate? It’s a stiff ship or tender ship? Stability of a ship, Free surface effect, how can you reduce free surface effect? When a surveyor comes for loadline markings, what he checks with respect to engine room equipments for load line? How is watertightness of a Bulk Head tested?

Trassi/Vinod

SC100 GZ curve and cross curves of stability SC101 Why minimum bunker is maintained before entering into drydock?

SC102 Inspection of sea chest in drydock


TRASSI TRASSI TRASSI TRASSI TRASSI TRASSI TRASSI Trassi Trassi Trassi Trassi Trassi Trassi / Barik

Vinod Vinod Vinod XYZ http://www.ukpandi.com/fileadmin/uploads/uk‐ pi/LP%20Documents/Carefully_to_Carry/Testing%20hatchcovers.pdf (NEEDS REVIEW) its the GM of the ship, which get affected while docking.... Wth more bunkers, ur c.g. Will drop down....and at the time of crtical docking point, the gm value is drastically changed.....so...the more difference between g and m of gm.....the less stable she becomes while docking it frm aft, at the first instant itself.... Wasim Hussain N 1. Condition of Paint / Coating 2. Condition of Grating / Wastage, if any 3. DPT / UT for surface inspections in areas where there is change of shape i.e corners, edges, bends 4. Condition of Sea Chest Sacrificial Anodes & Electrical Continuity of the same 5. Steam blow or air blow line to be checked clear.


Page 3 of 5



SC103 How will you find out if rudder is cracked in dry dock? How will you fix the crack? SC104 What is rudder balancing?

http://www.marinewiki.org/index.php?title=Rudder_-_Swing_test

SC105 What happens to GM of ship, when ship moves from water to dock? SC106 What is loadicator? SC107 In the threaded portion of the propellershaft which diameter is bigger : fwd or aft? SC108 What is singing of propeller?

Some propellers in service produce a high-pitched noise, often referred to as Singing. This sound typically is a clear harmonic tone much like a humming or ringing wine glass. More of an annoyance than anything harmful, the causes of singing are not completely understood. Many theories have been put forward to account for the phenomenon of Singing, but it appears to be affected by critical factors for which the theories make no allowance. For instance, in some cases when a twin-screw vessel has one propeller that sings, the noise is eliminated just by switching position of propellers. Or had been replaced by an identical spare Propellers which were found silent. Also the less number of blades the less cases of "singing". Mitigation of Singing: Antisinging Edge The singing is in function of propeller diameter and Rpm's, Boat speed and Trailing-edge size (thickness) and roundness. In most of the cases not much can be done on Diameter, Rpm's or speed, but we can modify the Edge Geometry. This has been the Strategy for all efforts to eliminate singing Most Propeller professionals (and others) are familiar with the Antisinging Edge – a Chamfering of the Trailing edge, typically on the Suction side. The intent of this shape is to avoid the creation of curving flow eddies by cleanly separating the flow off of the blade. The following graphic shows the Chamfering that goes from a 0.5 or 0.4 Radius to the tip of Suction Side. However the adoption of unduly thin edges can result in erosion or fracture of the blade near the edges, it is advised that Antising Edge may be considered as a last resort to minimize the Singing of an existing Propeller.

SC109 How to know ship sagged or hogged? SC110 Why tanker having less freeboard SC111 During fooding of ER, the aft end sinks first, still the emergency bilge suction valve and the

emergency bilge pump are situated to forwd end of the engine. Why? SC112 Differentiate between crane and derrick SC113 What is the difference between watertight door and weathertight door?



Page 4 of 5

MEO CLASS IV ORAL QUESTIONS - MMD MUMBAI SC115 Safety Features of Engine Room Crane:



1) The most important safety feature of the crane is the electromagnetic fail safe brakes which do not allow the crane to fall with the load even when there is failure of power. For this:Normally centrifugal brakes are used which are fitted inside the rotating drum.The brake pads are always in applied state and pushed by magnetic springs when not in operation or when there is a power failure.As the crane is operated or the power is supplied, the spring gets pulled inward or compressed due to the electromagnetic effect of the current. This allows the crane to be operated normally. 2)Emergency stop is provided in the remote so that the operator can stop the crane at any time. 3)The motor is fitted with distance limit switch in both transverse and longitudinal direction so that the travel of the trolley and hence crane should not overshoot the rack’s end. 4)Mechanical stoppers are provided for both directions in case the electrical distance limit trips fail. 5)The up and down travel of the hook is also attaches with automatic stopper to avoid overloading of the motor. 6)The motor is fitted with thermal protection trip. When the motor windings get overheated, trip will activate saving the motor winding from burning. 7) Load limit switch is also fitted which will trip the motor if the load to be lifted is above the crane capacity.


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FN 3 COSCOPOOL - SHIP SPECIFIC / CARGO SYSTEMS SS1 SS2 SS3 SS4 SS5 SS6 SS7 SS8 SS9 SS10 SS11 SS12 SS13 SS14 SS15 SS16 SS17 SS18 SS19 SS20 SS21 SS22 SS23 SS24 SS25 SS26 SS27 SS28 SS29 SS30

How will you confirm that pump room ventilation 20 air changes are taking place? Draw deck seal on your ship and also draw if any alarms or trips on it. Pump room blower capacity and regulations? GAS CARRIER: Draw and explain fixed DCP fire fighting system on deck & cargo space GAS CARRIER: LPG cargo containment system? GAS CARRIER: MARVS setting on cargo tanks.. GAS CARRIER: Material of tank insulation - what is there in the space between primary barrier & secondary barrier of cargo tank? GAS CARRIER: When you carry propane in cargo tanks, what arrangement is provided for expansion of tanK? GAS CARRIER: : Draw cross section of cargo tank? Material of chokes on which tank is supported. Cargo Boil off rate for your ship? GAS CARRIER: Loading and discharging operation. What safeties provided and all alarms and trips. Details. Gas Carrier: Why do we have booster pumps and heat exchanger in cargo line? GAS CARRIER: Air lock arrangement explain with diagram and regulations regarding the same. GAS CARRIER: Types of gas carrier. Gas Carrier: Types of cargo pumps you had on-board. COPT Trips OIL TKR: Hazards on crude oil tanker What do u mean by Aframax tankers? What pressure and vacuum values are there for PV valve and PV breaker? CHEM TKR: Difference between BCH & IBC code? CHEM TKR: Draw cross section of type 2 tanker along with constructional details. CHEM TKR: How many cargo tanks? CHEM TKR: How many manifolds? CHEM TKR: Which cargo needs water padding? CHEM TKR: Which category does vegetable oil falls in? CHEM TKR: Major hazard on chemical tanker CHEM TKR: Type 1 chemical tanker draw how tank is arranged? What checks you make on p/v breaker? What is the function of mast riser? Pump room ventilation, blower interlocks Why oil does not come out of PV valve or vents though tank pressure is more than the atmospheric pressure?



Barik Barik/Mishra Kapoor Piplani Piplani Piplani Piplani Piplani Piplani/Majumdar Sharma Trassi Trassi Trassi Trassi Trassi Trassi Trassi Trassi BCH applicable to ships made before 1st July 1986 & IBC after 1st July 86.

Trassi/Barik Trassi/Barik Trassi/Barik Trassi/Barik

Phosphorus - Red or Yellow? (confirm)

Trassi/Barik

Trassi/Barik fire, spillage ,health,static charge,and reactivity of cargo with Trassi/Narain tank coating Trassi/Narain It falls in chapter 17 of IBC code since it is chemical.

Vaad Vaad Vinod Pv valve has a setting for over pressurization and vacuum. Before that setting is achieved nothing will come out. Plus 2% volumetric space is provided for expansion and contraction purpose which is more than sufficient to stabilise the pressure. However if that setting is achieved then oil will come out of it.

Page 1 of 3



FN 3 - COSCOPOOL - IG SYSTEMS IG1 IG2 IG3 IG4 IG5 IG6 IG7 IG8 IG9 IG10 IG11 IG12 IG13 IG14 IG15 IG16 IG17 IG19 IG20 IG21 IG22 IG23 IG24

What is the Difference between the IGG and IGGS? (Safety)Regulations for IG? Why IG not required below 20000 DWT? Why IG not in bunker tanks? Scrubber tower with diagram What is safety on IG line? What is used to prevent the back flow from cargo tanks? Where you have read about the regulation of IG? Above what flash point IG is used? Why not for F/O? Is there any fuel less than 60 deg. What? And how much is the flash point? Used in what? Why IG used for COW? (static electricity) Inert gas purpose, what was system on your ship? Draw IG system and many cross questions in it - like type of water filled in deck seal (SW or FW)? Function of vent v/v on the line? Difference in pv valve and pv breaker? Reasons for high oxygen % in inert gas? IG below 20000DWT. What to do if IG is not there? How to carry cargo(on less than 2000DWT)? Arrangements and their details Visual inspection of IG furnace and Demister Deck seal as on your ship - draw it IG Alarms & Trips What are the pressure limits for p-v valve and p-v breaker on IG system? Draw Mast Riser. How is Mast Riser connected to all tanks? How is the Vapour Emitted from Mast Riser? How is the Pressure given to the vapours? Safeties devices in IG system, trips What is the purpose for mast riser ? Does mastriser function same as High Velocity Vent Valve (HVVV) ? What is the difference between PV breaker and PV valve ? Why do we inert the tanks in oil tanker? Inert gas plant



Kapoor Kapoor Kapoor Kapoor Mishra Narain/Saini Narain/Saini Narain/Saini Paul Paul Piplani Saini Sharma Sharma Trassi Trassi Trassi Trassi Vinod XYZ XYZ XYZ XYZ

Page 2 of 3



FN 3 COSCOPOOL - EVERYTHING ELSE F3-1 F3-2 F3-3 F3-4 F3-5 F3-6 F3-7 F3-8 F3-9 F3-10 F3-11 F3-12 F3-13 F3-14

F3-15 F3-16 F3-17 F3-18 F3-19 F3-20

Which person on ship is not a passenger What does PSC inspector checks on ship? What is risk analysis? If you have to do hot work on bottom platform then how will u do risk analysis? What is STCW? 1995 ammendments? 2010 ammendments? Why 2010 ammendments? Full form of function 3? Name all the subject which function 3 covers? Difference b/w Flag state and PSC What is PSC and its functions? Name a few conventions? What are conventions? What is classification society and its function? How Lloyd’s Register started? What is the speciality of SCBA compressor ? What is meant by White list? What is there to check cargo density if cargo pump is tripping on overload? Saturday routines ? please enlist What is LANE METER?

Bunkering safeties Actions after getting OMD alarm? E/R flooding – Actions? While answering he asked All Requirements of Bilge Injection Valve Bad weather precautions and actions Actions taken when there is an oil spill Bunker hose bursts while bunkering; actions to be taken.



(Crew and child below 1 year) Barik IQBAL - JHA Piplani/Shirish Sharma/Barik Sharma/Saini/Na rain Subramanian Vinod Vinod

A method of measuring the space capacity of ro-ro ships whereby each unit of space (linear meter) is represented by an area of deck 1.0 meter in length x 2.5 meters in width.

Barik Piplani Singh Vinod

Page 3 of 3



FN 3 COSCOPOOL - SOLAS & RELATED CODES Column1 SO1 SO2 SO3 SO4 SO5 SO6 SO7 SO8 SO9 SO10 SO11 SO12 SO13 SO14 SO15 SO16 SO17 SO18 SO19 SO20 SO21 SO22 SO23 SO24 SO25 SO26 SO27 SO28 SO29 SO30 SO31 SO32 SO33 SO34 SO35 SO36 SO37 SO38

Column2 What is major non conformity ? What is the non conformity and who all can find these? Regulations for Emergency generator? What are the documents issued under ISM code (lots of cross questions on this) ISM certificates and when they shall be revoked prior to 5 years What is the difference between cargo and passenger ship? Where do you find your duties on board? What all is there in SMS manual? Who issues DOC and SMC and validity and to whom it is issued. What are the differences in life boat and rescue boat? What is Chapter 9 of SOLAS? What are SOLAS Chapter 5 new amendments?? How will you know that the copy of DOC on-board is concerned to that vessel only? What is the non-conformity and who all can find these? ISPS Name SOLAS Chapters & Explain Ch 12. How you will detect fire in cargo hold? Certificates carried on board What is ISM code and why it came into action? Tell me at least three main objectives of ISM? If two hrs notice is given what will be your first action? ISPS - how the system works, depth AIS Details? How it works? What identifications you are getting? Use of AIS? Security levels.....with cross que What all certificates should be carried by ship? What is the difference between the CODE and the Convention? Name 6 codes and 6 conventions? What is SOLAS Ch IX? Tell me about that SOLAS chapter 11. Explain everything whatever it deals with. Both parts. What is chapter 9? How many regulations of ISM? Emergency fire pump regulation Explain ISPS and lot of cross questions? Have you ever followed ISM code on-board? Under which SOLAS chapter ISM Code included? Latest amendment in SOLAS regarding Lifeboat Duty of DPA? What is non-conformity? Emergency generator and emergency fire pump regulations? Bulk carrier transverse stability Chapter in SOLAS ISM code new amendment (energy efficiency) ISPS - Basic/General What are the emergency fire pump regulations and working? (means of starting and at what distance how much pressure this is what he wanted)


Column3

Column4 Barik

auditor, - internal or external (flag, class)


Barik Barik Barik Barik Barik Barik Barik Barik Barik Barik/Dastoor Barik/Dastoor Barik/Mishra Barik/Mishra Barik/Vaad/Mishra Bhalla/Shirish Bhalla/Shirish Kamath Kamath Kamath/Trassi Kamath Kamath/Barik Kapoor Kapoor Mishra Mishra Mishra Mishra/Trassi Narain/Saini Narain/Saini Narain/Saini New Saini Saini Sharma Sharma Sharma Singh

Page 1 of 2

MEO CLASS IV ORAL QUESTIONS - MMD MUMBAI SO39 SO40 SO41 SO42

SO43

SO44 SO45 SO46

SO47 SO48


New Amendments in SOLAS SOLAS Ch 11 - B, some certificate, who assigns it, validity. ISM objectives? How will you make sure that it’s being followed? ISM Details : What is ISM? History of ISM. Which SOLAS Chapter? What certificates / verifications/ validity/ issuing authority? Difference between SMC & DOC? Similar items in SMC & DOC? How do you know ISM is implemented on a ship when you join? Functional requirement of ISM? (one sentence answer). How ISM maintained and monitored onboard? Certificates Issued and other things like audits, management review etc.

Singh

What is IMDG and IBC code? What certificates are issued under these codes? In which chapters of SOLAS and Annexures of MARPOL do IBC and IMDG code related? What is ISPS code (full form) when it came into force, what certificates? Who were your DPA, CSO, and SSO? What are their responsibilities (each of them) where is their name posted?

xyz

What are security levels, how these were maintained on-board? Your responsibilities? What is VRP?


Subramanian Subramanian Trassi / Barik / Majumdar Trassi / Kapoor

xyz xyz

xyz (Vessel Response Plan?)


Page 2 of 2



FN 4B - MEOL - MAIN ENGINE, ME SHAFTING AND RELATED SYSTEMS 4ME1 4ME2 4ME3 4ME4 4ME5 4ME6 4ME7 4ME8 4ME9 4ME10 4ME11 4ME12 4ME13 4ME14 4ME15 4ME16 4ME17 4ME18 4ME19 4ME20 4ME21 4ME22 4ME23 4ME24 4ME25 4ME26 4ME27 4ME28 4ME29 4ME30 4ME31 4ME32 4ME33 4ME34 4ME35 4ME36 4ME37 4ME38 4ME39 4ME40

During manoeuvring, how will you know leakage in Air starting valve? T/C surging. Procedure to follow during departure of main engine? Purpose of negative cam in distributor? Fuel injector leaking? What it indicates? Exhaust temperature will be high or low. What all will check when you take round of main engine only? Why turbocharger? Surging and reasons for it How main engine reversing takes place? There is alarm of OMD. What actions will you take? How main engine reversing takes place? Main difference between LO oil used in crankcase for 2S & 4S When you are taking indicator card and engine tripped on some mechanical trip what will be maximum pressure? Stresses acting on 4stroke conrod. Are they any different than 2s conrod stresses? Different means of reversing . How reversing took place in ur ship? Draw indicator diagram for leaking fuel injector. How is firing order for Main engine decided? Why 1-7-2-4-6-3-5 and not 1-2-3-4-5-6-7? Importance of flywheel. Stern tube lubrication and some cross question. Piston rings, Determine Condition of piston ring w/o removing piston out. Coolers on ME / AE Critical Speed Why chokes are used in engine, types of chokes? Starting Air Line Safeties Advance technlogy in Engines? Types of crank shaft. Welded crank shaft is welded where? AE has which crank shaft? How do you measure ovality of big end? Why do u measure at those point only? Why bottom end serrated? BSFOC calculation (from qty of FO in liters ) Exhaust manifold- How pulse of exhaust gets converted into constant pressure? Hydraulic exhaust valve and spring loaded old type valves - what are advantages? Air cooler maintenance Starting air line safeties (Fn 3) M/E fuel injector diagram operation. M/E interlocks. M/E Manoeuvring M/E - What S denotes in SMC What if stroke to bore ratio less. Advantages of super long stroke. M/E valve timing diagram. M/E exhaust v/v how it operates. Function of sealing air. What if sealing air not present.

FN 4 ‐ ME RELATED SYSTEMS


AK Sharma AK Sharma AK Sharma AK Sharma AK Sharma Barik Barik Barik/Dastoor Barik/Dastoor Barik/Dastoor Barik/Dastur Barik/Mishra Barik/Mishra Barik/Neti Iqbal Iqbal Narain/Iqbal Iqbal IQBAL - JHA IQBAL - JHA IQBAL - JHA IQBAL - JHA IQBAL - JHA IQBAL - JHA Jha Jha Jha Kamat/Piplani Kamat/Piplani Kamat/Piplani Kamat/Piplani Kamat/Piplani Kamath Kamath Kamath Kamath Kamath Kamath Kamath Kamath

Page 1 of 8

MEO CLASS IV ORAL QUESTIONS - MMD MUMBAI 4ME41 4ME42 4ME43 4ME44 4ME45 4ME46 4ME47 4ME48 4ME49 4ME50 4ME51 4ME52 4ME53 4ME54 4ME55 4ME56 4ME57 4ME58 4ME59 4ME60 4ME61 4ME62 4ME63 4ME64 4ME65 4ME66 4ME67 4ME68 4ME69 4ME70 4ME71 4ME72 4ME73 4ME74 4ME75 4ME76 4ME77 4ME78

Why exhaust valve don’t fall in liner when spring air not present. M/E bottom end bearing clearance procedure. Cross head-why is it there in 2-s and what does it do primarily. 2-s /4-s difference and difference between there lubrication system Difference between c-case oil and cylinder oil, oil used for camshaft lub. , cold corrosion. Piston cooling in 2/s & 4/s, and parameters. Jacket cooling Parameters. Cylinder Lubrication in 2/s & 4/s. some cross questions. Scavenge fire. Crank case explosion. Piston oil cooling line in both aux and main. Safety valve on ME. Prepare main engine .but while explaining put lots of cross questions - like what if leak in JCW line etc. Cylinder line lubrication oil properties? Full shaft arrangement of M/E, how is it connected to propeller, shafts rest on which thing after the engine room? What is stern tube? where it is? What is the purpose of it? Valve timing diagram of the loop scvanging and uni flow scvanging? What is SFOC? How it is calculated? Liner calibration which tool? What is the least count and the zero error with reference to micro meter? Fuel Pump - Jerk type and Bosch type MEP - How to calculate? Why to calculate? Tie bolt function and diagram Types of turbocharger Main engine is turning on air but not coming on fuel – reasons? Types of ME bedplate. 4 stroke engine for propulsion. Show entire arrangement. Cylinder oil properties for 2 stroke and 4 stroke. TBN value Crankshaft deflection - How taken? How to draw the graph of Angle vs Deflection? How will you check misalignment is due? Safeties for crankcase. Function of breather pipe,. Flash point of Lube oil OMD alarm. What % OMD alarm will get activated? Reversing of main engine. Lost motion principle 4 stroke engine for propulsion. Show entire arrangement. Cylinder oil properties for 2 stroke and 4 stroke. TBN value How is camshaft & crankshaft connected in M/E? Lubrication arrangement for them Safeties for crankcase. Function of breather pipe,. Flash point of Lube oil OMD alarm. What % OMD alarm will get activated? Reversing of main engine. Lost motion principle



Compiled by: WASIM HUSSAIN N https://www.facebook.com/en.wasim Kamath Kamath Kamath Kamath Kamath Kamath Kamath Kamath Kamath Kamath Kamath Kamath Kamath Kapoor Kapoor Kapoor Kapoor Kapoor Kapoor Kapoor Kapoor Majumdar Mishra Mishra Mishra Mishra Piplani Piplani Piplani Piplani Piplani Piplani Piplani Piplani Piplani Piplani Piplani Piplani

Page 2 of 8

MEO CLASS IV ORAL QUESTIONS - MMD MUMBAI 4ME79 4ME80 4ME81 4ME82 4ME83

4ME84 4ME85 4ME86 4ME87 4ME88 4ME89 4ME90 4ME91 4ME92 4ME93 4ME94 4ME95 4ME96 4ME97 4ME98 4ME99 4ME100 4ME101 4ME102 4ME103

Crankshaft deflection - How taken? How to draw the graph of Angle vs Deflection? How will you check misalignment is due? Difference between turbochargers of 2 stroke and 4 stroke ME Safeties ME LO line diagram including cross head lubrication and piston return lines How to calculate power? How it’s done on ship? How to calculate power if there’s no cylmate, no digital indicator and no old school stylus!

Piplani Piplani Piplani Piplani planimeter is not provided when the engine doesn't have a separate cam for taking power cards. instead sometimes electronic engine performance monitors are provided. but sometimes they are not..so then we find out power developed by using turbocharger rpm and then correlating it various graphs of other paramneters like scavenge temp and all.

Saini

Sharma

RT-Flex distributor reversing, how is it done, construction diagram Draw card & indicator card difference. Then explain Draw Card What is puncture valve? Difference between ME & MC engines Type of fuel pump in your ship and explain? Why FQS lever is provided ?

Sharma Sharma Sharma Shirish Kumar FQS- lever in SULZER engines. FQS is provided to adjust the ignition delay due to bad quality of fuel in 2S engine

ME cooling water test, values and action Manoeuvring diag. (Asked for block diagram and safeties/ interlocks) Starting Air Line Explosion - a) What is it? b) Causes c) During manoeuvring starting air v/v leaking how will you identify which one & what will be your action? Tie Rods: Functions and Pre-Tensioning Method Fuel V/v Diagram and working Turbocharger Surging: explain what is it Main Engine Reversing- lots of cross questions How propeller torque is achieved? ME lub oil line diagram, showing all components in line? Hydrostatic Hydrodynamic Lubrication Working of VIT? some cross questions Working of fuel pump? Reversing of main engine? Lots of cross question? Exhaust v/v cam need not be set to new position? Why? Draw power card, compression card, Difference between peak pr, compression pr, mean effective pr,




Shirish Kumar Singh Singh Singh Singh Singh Singh Subramanian Subramanian Subramanian Subramanian Subramanian Subramanian Subramanian Tambvekar

Page 3 of 8

MEO CLASS IV ORAL QUESTIONS - MMD MUMBAI 4ME104 Difference between RTA engine and MAN MC engine

There are still some differences in the lubrication arrangements. In MAN B&W, luboil is conveyed by means of telescopic pipes common for piston cooling and bearing lubrication, while in Sulzer, it is conveyed through an arrangement of hollow pins and articulated pipes, separate for each function. Another difference in lub oil system is MAN B&W has a common pump and pressure line for both main bearing and crosshead bearing lubrication. The luboil is admitted to the upper half of the crosshead bearings from where oil grooves lead the oil to the lower loaded half. Sulzer has some kind of pressure boosting arrangement using a second set of pumps to supply oil direct to the crosshead bearing loaded lower half. inorder to reduce bending moment of tie rods in rta jack bolts r used ...tie rods of mc engine do not tube and they do not go upto the bedplate.... cylinder lubrication of rta is accumulator pressure type

4ME105 Safety of T/G and how will u check for over speed trip 4ME106 How lubrication takes place in LMC engine? Crosshead lubrication. How so small pressure is 4ME107 4ME108 4ME109 4ME110 4ME111 4ME112 4ME113 4ME114 4ME115 4ME116 4ME117 4ME118 4ME119 4ME120 4ME121 4ME122 4ME123 4ME124 4ME125 4ME126 4ME127 4ME128 4ME129 4ME130 4ME131 4ME132

maintaining the oil film? Stroke to bore ratio of your engine, How much was SFOC of your ship. What type of lubricator in Sulzer RT FLEX? Longitudinal cross-section of bellow of exhaust valve? Piston clearances. How reversing of main engine takes place? Draw how air distributor cam rotates in forward and reverse direction? (basically the operating mechanism). Scavenge Space inspection. RT Flex lubrication system Stuffing box. How reversing is achieved? Why turbocharger? Can we run main engines without them? How? All the clearances and why are they given? Reversing in MC engines OMD and its principle Checks to be made while crank case inspection Crank case explosion How to take all ME bearing clearance and what are the normal values of clearances? Piston crown checks Piston ring clearances Piston checks Cylinder head overhaul Tappet clearance Rocker arm maintenance Fuel pp onboard, type, parts,construction Main engine interlocks, Turning gear interlock, how it works?




Trassi

Trassi Trassi Trassi Trassi Trassi Trassi Vaad Vaad Vaad Vaad Vaad Vinod Vinod Vinod Vinod xyz xyz xyz xyz xyz xyz xyz xyz xyz xyz xyz xyz xyz

Page 4 of 8



4ME133 Power imbalance and catalytic fines

xyz

4ME134 Draw manoeuvring diagram, tell the position of fuel cam while stopping and few more question on

xyz

4ME135 4ME136 4ME137 4ME138 4ME139 4ME140

it. Draw lube oil circuit of your main engine and what are the alarms and trips provided for lube oil only for main engine? V/v timing diagram of 2-stroke, p-v diagram of same and draw card for 2-stroke and then the postion of TDC on draw card? How is chain case lubricated? How can the chain be tightened if it has become loose? What is the sac volume in a fuel injector? What is the pressure of lube oil at ME main bearings?

xyz xyz xyz xyz xyz Wasim Hussain N GUYS, YOU ARE CONFUSING LUB OIL LINE PRESSURE xyz WITH OIL PRESSURE AT BEARING! WHAT SURVEYOR WOULD BE INTERESTED IN LINE PRESSURE OF OIL? THE PRESSURE THAT WE SEE ON GAUGE IS ACTUALLY THE PRESSURE THAT IS MAINTAINED TO SUPPLY ENOUGH OIL TO EACH BEARING! ACTUAL OIL PRESSURE AT THE BEARINGS IS FOUND USING THE FORMULA: Brg Load = (mu) sq(N -rps) R L / C, Brg Pr = Load/Area

4ME141 The line from the expansion tank enter to the suction side or discharge side of the JCW pump and 4ME142 4ME143 4ME144 4ME145 4ME146 4ME147

explain the reason for that Draw main engine lube oil line What is the purpose of having back flush filter in LO line? What is the pressure of lube oil at ME main bearings? What is VIT and cross questions? How reversing takes place? What type of lubrication used for thrust bearing? Hydrodynamic or hydrostatic lub?

xyz xyz xyz xyz xyz xyz As thrust collar rotates it draws oil with it creating pressure and because of the shape at the back of thrust pad it tilts pivoting on its inner edge.As a result oil wedge is formed for lubrication.Therefore hydrodynamic lubrication occurs

4ME148 LO test report from shore- what all are the contaminants? If iron n copper present in LO test report

wat will you check in engine(which part)? If sodium is present what is the cause? 4ME149 Procedure for taking indicator card 4ME150 How peak pressure measured in generator? Can we use same instrument for ME? 4ME151 What is the material of crosshead bearing, telescopic pipe, articulated pipe?



Page 5 of 8

MEO CLASS IV ORAL QUESTIONS - MMD MUMBAI 4ME152 What is piston slap?


Piston slap is nothing new to piston driven internal combustion engines and compressors. It is the secondary (sideways or perpendicular) movement of a piston against the side of a cylinder bore where the primary movement of a piston is intended to be parallel (up and down) to the cylinder bore. All piston driven internal combustion engines and compressors have a certain amount of piston slap. Excessive piston slap occurs when the clearance between the piston and the cylinder bore is too great. The piston to cylinder bore clearance becomes too great either through wear, mismatched pistons and cylinder bores at manufacturing or, a combination of both. The audible noise associated with excessive piston slap is due to the perpendicular impact of the piston against the wall of the cylinder bore. Audible piston slap is typically loudest when the engine is first started up. The pistons then expand with heat reducing the piston to cylinder bore clearance thus, reducing the perpendicular impact of the piston against the cylinder wall and its resulting noise.

4ME153 Not all ships are provided with planimeter. How to calculate power in that case? Also the

procedure to find SFOC? 4ME154 MCR, NCR - Definitions? Your ship MCR. NCR? 4ME155 Stresses in A/E and M/E starting frm piston to propeller? 4ME156 The line from the expansion tank enter to the suction side or discharge side of the JCW pump and

explain the reason for that 4ME157 How to check the integrity of piston rod gland without opening it? 4ME158 Why 1.4mm lift is given for injectors? Why not more or less?

this lift is needle lifts up in the injector during injection. if this is the lift which u are talking about, then higher lift will impinge needle on its seat an damage takes place drastically. lower lift will reduce amount of flow of oil required.

4ME159 How is the Tie rod attached to the Bedplate? 4ME160 What UEC stands for ?

Wasim Hussain N U-Uniflow scavenging E-Exhaust gas turbocharging C-Cross head type engine

4ME161 How to find the elongation of chain in chain case? How to measure percentage elongation? 4ME162 What is Mark-1,2,3,4& 5 engine? 4ME163 What is MC,ME,MCC,MCE? 4ME164 What is oil analysis? How it can be used for engine condition monitoring? 4ME165 How will you know without opening anything that it is two stroke or 4 stroke Engine? 4ME166 What is priming of fuel injector? 4ME167 Difference between lubrication of X-HD in sulzer RTA n B&W MC engines. Construction and

operational differences? 4ME168 How to confirm exhaust valve rotation?

In man bw , there is spring loaded rod or plunger which when removed from its stowed position, stands upright on the damping piston which looks like inverted saucepan. This piston has a tapered crease. When the plunger is in contact with this, when the valve rotates the plunger goes up and down. That shows exh valve moving up and down and rotating.

4ME169 Why Pulse type T/C used in AE and Constant Pressure T/C in ME?



Page 6 of 8



4ME170 How to adjust timing of cam shaft relative to crank shaft? 4ME171 Difference between super VIT and VIT? 4ME172 Difference between specific fuel consumption and total fuel consumption? 4ME173 Excessive honing of liner will lead to?

4ME174 What is supercharging? Construction of turbochager, function of each parts, 4ME175 JCW Expansion tank- why it is provided? Suppose oil is there from where it can come? 4ME176 Difference between RTA engine and MAN MC engine

Wasim Hussain N failure of lub oil retentivity on liner which leads to damage of piston rings nd liner due to lack of lubrication. excessive clearance b/w liner nd rings ,in severe cases blow past can take place

There are still some differences in the lubrication arrangements. In MAN B&W, luboil is conveyed by means of telescopic pipes common for piston cooling and bearing lubrication, while in Sulzer, it is conveyed through an arrangement of hollow pins and articulated pipes, separate for each function. Another difference in lub oil system is MAN B&W has a common pump and pressure line for both main bearing and crosshead bearing lubrication. The luboil is admitted to the upper half of the crosshead bearings from where oil grooves lead the oil to the lower loaded half. Sulzer has some kind of pressure boosting arrangement using a second set of pumps to supply oil direct to the crosshead bearing loaded lower half. inorder to reduce bending moment of tie rods in rta jack bolts r used ...tie rods of mc engine do not tube and they do not go upto the bedplate.... cylinder lubrication of rta is accumulator pressure type

4ME177 6S60MC-C8 wat does C8 stand foR? 4ME178 In man B&W L-MC engine I saw that the fuel recirculation was through the fuel injector when the

engine is stopped . Although on Sulzer RTA i was told that the recirculation takes place by keeping the suction valve open hence shorting the fuel through the pump itslef and no fuel goes thru the injectors. Any comments on the same?

4ME179 What is detuner?


there's a separate connection from fuel supply line (8 to 9 bars) to individual units fuel injectors. Per unit we have two copper line which is tapped and valves provided (one inlet and one outlet) So fuel from 9 bar line is taken and main line and given to fuel injector 1 then outlet is conected to fuel injector 2 then outlet of 2 is connected to inlet of 3 and outlet of 3 connected to main fuel oil return line . This was there as per my latest ship . Connections differ as per licensee. Detuner reduces the critical rpm. If critical rpm is near or above 75% mcr then it would be near operating point of the engine. So installation of de-tuner will shift the critical rpm in manoeuvring range of the engine like between half ahead and full ahead or between full ahead and 40 % mcr speed. Inside crankcase, in chaincase there are extra wheels which rotate in opposite direction and twice the speed , powered by chain in manbw


Page 7 of 8

MEO CLASS IV ORAL QUESTIONS - MMD MUMBAI 4ME180 Can any one explain the Main engine air fuel interlock, more specifically how does the air get cut

off and fuel injected during starting of the main engine. any diagrams would be helpful

4ME181 MAN B&W 7K80MCC-MK6 ENGINE - MK6 IS THE MARK NUMBER. BUT WHAT IT INDICATES


When start signal is given...electrical signal opens the start solenoid admitting the starting air to turn d engine. It cutsoff whn a predefined rpm reaches. Now, in case of Sulzer engines, air along with very small amt of fuel is used during starting. Whereas in MAN BW only air is used, and once tht rpm is reached, there is an overlap period of start n run signal as both the uswitches "start n run" r pressed together for 1sec to 1.5sec ensuring air n fuel admitted together for a positive start. ABOVE CONTENT IS AS EXPLAINED BY SAMANTH SIR. But if still it needs ne correction or if im wrong plz do correct me. http://www.mandieselturbo.com/files/news/filesof6534/Press_Release_0022.pdf

AND WHAT CHANGES ARE MADE IN ENGINE COMPARE TO SAME SERIES PREVIOUS ENGINE?



Page 8 of 8



FN 4B - AUX ENGINE & RELATED SYSTEMS 4AE1 4AE2 4AE3 4AE4 4AE5 4AE6 4AE7 4AE8 4AE9 4AE10 4AE11 4AE12 4AE13 4AE14 4AE15 4AE16 4AE17 4AE18 4AE19 4AE20

What to do if cam of fuel pump of one of d unit of Aux. engine is corroded? Tappet clearance? How will you ensure that the v/v seats are closed (to take tappet)? Tappet Adjustment. How is it done? Where all it can be checked? What happens if wrongly adjusted? If no indication on flywheel, how will you do? How to adjust compression pressure when generator is running? How is camshaft & crankshaft connected in A/E? Lubrication arrangement for them How starting air is supplied to aux engine? Draw & explain. Function of air distributor. Tappet clearance. Everything in depth (start to end) 4-stroke bottom end bearing clearance. How to take and position of piston? Draw timing and PV diagram along with piston movements of 4 stroke engine? Dual, Diesel & Otto cycles Draw/explain LO circuit for AE. How does liner get lubricated? (fav question) AE - how fuel goes inside? Diagram? Injector overhaul? Additives of A/E L.O.TBN of AE oil ? Aux engine liner lubrication Crankcase inspection in auxiliary engine, How lubrication of liner is done in aux engine? How to test lub oil trip and over speed trip in aux engine? What impurities can be found in the LO of a generator How does A/E LO get dirty? How does piston gets lubricated in 2s & 4s? With figure Lube oil consumption increases of generator after 1000 hrs of decarb ? What all possible reason ?

AK Sharma Checking the push rods are loose is one method but the appropriate method is to see that push rod roller is on base circle of the cam

Iqbal Kamath Narain Piplani Piplani Sharma Sharma Subramanian

oil through gudgeon pin and splash

Subramanian Trassi Trassi Vinod Vinod Vinod Vinod xyz xyz xyz

4AE21 Overspeed Trip Testing for AE

1. SIMULATION: reduce the governor overspeed spetting to slightly above normal operating speed (eg: 750 rpm for 720 rpm rated engine). Then increase the fuel to the engine by either pushing the fuel racks or by governor knob or from the main switchboard. Remember overspeed is actually done on engines at no load. Refer manual for safety instructions as most of the manudfacturers specify to check con. rod bottom end bolt tightness after an overspeed trip. 2. ACTUAL: Just keep on increasing the fuel to the engine till the engine trips on overspeed (be cautious about rpm). To be little bit more elaborate: every engine has 2 overspeed trip settings. one is electrical and other is mechanical. Both are for the engine side and not for alternator. Electrical setting or trip will activate first and then if electrical fails then mechanical.

4AE22 Why 2 springs for 4S valve arrangement?

Wasim Hussain N IT ALTERS THE NATURAL FREQUENCY, THEREBY MOVING AWAY THE CRITICAL / RESONANT FREQUENCY OUT OF NORMAL OPERATING RANGE, ALSO, IT EXERTS BALANCED FORCE ON VALVE AGAINST VALVE SEAT

4AE23 How to identify a unit at TDC without refering to flywheel marking? 4AE24 Why gudgeon pin in compressor is fixed and free floating in AE?

FN 4B‐ AE AND RELATED SYSTEMS


Page 1 of 2

MEO CLASS IV ORAL QUESTIONS - MMD MUMBAI 4AE25 Difference between auxiliary engine governor and main engine governor. 4AE26 Why we cant reverse 4 stroke engine directly?

4AE27 Engine is running but not taking load. What may be the reason?

FN 4B‐ AE AND RELATED SYSTEMS


main reason is v/v timing diagram. Engine can be reversed easily if v/v timing is symmetric across bdc n tdc... For eg: 2 stroke engine with loop n cross flow scavenging can be easily reverse b coz ports timing is symmentric... But in case of 4 stroke engine valve timing is different wrt bdc n tdc. So reversing becomes complicated. Generator ? Load limit switch on governor has been set to zero. Set it at 10 for max load limit. In ME, VIT linkage disengaged due to fretting governor actuator erratic


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FN 4B MEOL - BOILERS 4BL1 4BL2 4BL3 4BL4 4BL5 4BL6 4BL7 4BL8 4BL9 4BL10 4BL11 4BL12 4BL13 4BL14 4BL15

AK Sharma AK Sharma AK Sharma AK Sharma Barik/Dastoor Barik/Mishra Barik/Mishra Barik/Neti Barik/Neti Dastoor

What is steam trap? Where is it located? Its function? Is there a strainer before it? Position of steam trap in bunker heating steam line? Feed water line diagram? How will u know oil on feed water line? What is priming of boiler? How may safety valves are there on Auxiliary Boiler and how does it works with diagram. What are all the safety checks u will carry out before starting a boiler? Why vent provided on boiler? Boiler mountings? Why easing gears? Purpose of expansion tank. How to know the tank is empty or full, if you are not able to see the level in gauge glass. Purpose of boiler register draw n show Why 2 Boiler gauge glasses? How to find if both functioning correctly? About safety valve. Gagging of valve and its purpose. If oil goes into the boiler how will u come to know? Already INSIDE the boiler Boiler water treatment: how salt formation takes place though FWG water has salt content 2ppm?

4BL16 Boiler water level is going down – reasons? 4BL17 Boiler gauge glass blow down. 4BL18 Boiler accumulation of pressure. Test of accumulation of pressure. What is importance of Boiler low

Dastoor IQBAL - JHA Kamat Kamat Kamat/Piplani (I said tube leak then he asked how to confirm)

Kamat/Piplani Kamath Kamath

water level trip and alarm. How to try out /test? 4BL19 Types of boiler burner? Explain any 1? 4BL20 Boiler furnace inspection, how will you prepare for that? 4BL21 Draw Boiler feed water line. In which line is the feed water regulator? Is it in the main line or auxiliary 4BL22 4BL23 4BL24 4BL25 4BL26 4BL27 4BL28 4BL29 4BL30 4BL31 4BL32 4BL33 4BL34 4BL35

line? If one gauge glass show half level and other showing fluctuation what does it mean? How to know if oil is there in boiler water? What are boiler water treatments? pH of boiler water? Why alkaline? What acidity hazards? Scaling hazards? What if Chloride contents increases? Hydraulic pressure testing of boiler. Why & How? What is soot? Why soot blow? Draw arrangement of soot blowers on your ship. Draw cross section of boiler and all the feed water and steam outlet connection and where fitted location-wise. Or Sketch boiler of your ship with all details Safeties on Boiler? Boiler CW Test, Values & Action Boiler Water Treatment, what if chloride content increases, blowdown procedure, what if Chlorine content continue to increase even after blowdown? What is boiler steam temp? I said 100deg saturated steam? Then he asked- How does 100deg steam heat fuel oil up to 140deg? Boiler feed water line diagram What type of steam trap on deck cargo steam line? Hot well overflowing reasons

FN 4B+6 BOILERS


Mishra Mishra Mishra Mishra Piplani Piplani Piplani Piplani Piplani Piplani / Vaad Singh Singh Subramanian Subramanian Trassi / Barik Trassi / Barik Trassi / Barik

Page 1 of 5



4BL36 Boiler water tests? Values? What to do when value rises? How is phosphate test done and why is 4BL37 4BL38 4BL39 4BL40 4BL41 4BL42 4BL43 4BL44 4BL45 4BL46 4BL47 4BL48 4BL49 4BL50 4BL51 4BL52 4BL53 4BL54 4BL55 4BL56 4BL57 4BL58 4BL59

phosphate test done? What information is provided on safety valve? Boiler safeties There is no water in the boiler - What action will you take? Boiler gauge glass, boiler leak off alarm why? Why do you blow down boiler and how? What do u mean by boiler panting? What do u mean by boiler running in? Purpose of ignition transformer? Effects of water getting carried over boiler Boiler double banking How much was the pre and post purge time. Can u change that and how to find the min amount of purge time(if there is no manual)? What is boiling point of a liquid ? nitrate in jacket water should be around 1400 ....what will happen if nitrate comes below this level. what may be the reason of falling nitrate Floating of boiler safety valve is done during drydock survey How is boiler feed water control connected to boiler combustion control. Manual firing of boiler Why feed water p/p lose suction if feed water temperature is too high? How to adjust air fuel ratio in a boiler? How to fire the boiler manually? Methods for detection and taking out oil from hotwell? What is Primary and Secondary Air Combustion in Boiler? Why multistage pump for blr feed water? What actions to be taken for the following-for boilers 1.low ph or acidic condition 2.high alkanility 3high tss 4.hydrazine.

Vaad Vinod Vinod Vinod Vinod Vinod

Low ph : add chemicals and increase alkalinity. High alkalinity: blowdown and take fresh water which will dilute and reduce alkalinity Tss: to reduce scum and bottom blowdown Hydrazine : this is oxygen scavenger and addition of hydrazine will reduce oxygen from boiler water.

4BL60 What will happen if steam traps are not used in steam system?

nothing happens if you dont use steam traps. u will increase losses as first latent heat of steam to water is not used . second since steam will return to your hotwell instead of hot water, that would seriously steam the hotwell. as the dump condensor is not designed to condense that amount of steam, hot well will be very hot and boiling.

4BL61 What is the voltage supplied to pilot burner in boiler and how ?

pilot igniter voltage is in the order of 11,100 volts exactly. Don say 11000 volts. From 440V, a step up transformer is used and thus such high voltages are achieved at the electrode terminals to create a spark.

FN 4B+6 BOILERS


Page 2 of 5



4BL62 Why rotary cup burner is preferred in boiler?

The use depends on turndown ratio. Higher the load fluctuations higher is the need of turndown ratio. Rotary cup don't have high turndown ratio. They are used for almost same loads or very little load fluctuations. Means only for purpose of heating. When turbines r used such as copt or propulsion, high pressure and high load fluctuations are encountered so rotary cup burners are not used , instead pressure jet, y-jet. Etc are used.

4BL63 How would you find out if oil has entered inside the boiler steam drum?

Oil in steam drum means that your hot well and cascade tank is also full of oil. This is a definite disaster. Hope you all must have seen that the boiler feed pump takes suction from bottom of cascade tank. If oil has managed to find its way into steam drum, then it is not traces, it is a major contamination and thus steam pressure would have dropped well before such happening. Boiler fuel consumption increases and steam pressure becomes erratic. In such situation, tubes will start to over heat and melting may start as temperature increases. Steam pressure may still be less. Oil detection probe/alarm installed in condensate observation tank . Sight glass at obs tank. Plus water doesn't overflow from top most level from observation tank to hotwell but at slightly lower level to compensate for some oil (if any) will remain in observation tank and not flow into hotwell. P alkalinity wil increase

4BL64 Prepurging & postpurging time for boiler?

2 min.... for purging which accomodates 4 times of complete furnace air change...... According to drew chemical sheet which I have used, it says low pressure boilers upto 7 to 8 bars, chloride can be upto 300 ppm. Of course lesser the better. However as pressures go high the acceptable limit comes down. High pressure boilers it goes down 50ppm. for 16 bar = 150 ppm...for 30 bar = less than 50 ppm

4BL65 Chloride content of boiler water: normal range?

4BL66 What is the purpose of a gland steam?

FN 4B+6 BOILERS

As steam performs work on the system giving out enthalpy and driving the turbine, the pressure of the steam or enthalpy decreases, temperature falls etc. In order to obtain same work done per unit area, as pressure drops thru the stages of turbine the area of turbine blades has to increase, hence lp is bigger than hp. When pressure falls to such a level that air ingress starts at the end of turbine , we give 0.2 bar steam for not allowing air to go out nor steam to come out from the turbine into engine room.


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4BL67 Hide-out

It can be seen in high pressure boilers that as the steaming rate increases the levels of certain salts, particularly phosphate salts, does not raise in line with others. When the load is reduced the concentrations return to normal. This is termed hide-out and is due to the reduced solubility of sodium phsophate at temperatures above 250'C When phosphate hide-out occurs there is a risk of permenant scal deposition and/or evolution of free caustic which in turn could lead to severe corrosion due to caustic attack Treatment using volatile solids free chemicals such as hydrazine, Eliminox and neutralising amines should be considered. This is termed All Volatile Treatment (AVT)

4BL68 Why are the two safety valves in a boiler set at different pressures ?

practically it is not possible to set at same exact pressures. We tried to. But there was some error..That is why class gives an allowance of 3% between the safety valves. If you can set well and good. If not this 3% is for human error allowance. Not only in marine industry - we follow DOT and Boiler Norms which used ashore. Also remember if you set at same pressure, then you would waste too much water.

4BL69 Types of steam trap . Working . Purpose and location

steam traps allows latent heat of steam also to be extracted from return steam. as steam trap doesnt allow steam to pass through, the steam condenses into water in the pipeline itself, the condensed water is able to lift the valve in steam trap. secondly the hotwell will not steam up as return will be hot water rather than steam

4BL70 REASON FOR BOILER FEED WATER CASCADE TANK OVERFLOW WHILE MANOEUVRING?

Swapneil Tamhankar : Mismatch between steam generation amd steam requirement. In order to maintain or prolong boiler pressure without the need to fire it, when boiler pressure rises too much, we open more steam to bunker tanks, these bunker tanks situated in fwd , midship area will have condensate in their return line as well as in steam inlet line, this water comes back to cascade tank and overflows the cascade tank. TO AVOID THIS: Do not open too much any steam to a tank which has very long steam line and return line. If we open a lill bit, then steam will make the water before steam trap into steam first, so your inlet is completely filled with steam so half the work is over. Do not open more than one tank at a time, ensure system is stable first, then crack open second tank steam inlet . And so on and so forth

4BL71 Why a high lift safety valve is called high lift safety valve?

The ordinary safty vlv usd to lift d/36. Latr high lift vlv came it had waste piston arrangement it liftd d/24. Nd now we hv improvd high lift it lifts d/12 with floating ring and waste steam piston. Hence v use 2 so that atleast v get a total lift of d/6 .

4BL72 Why at start the air damper after pre purge cycle not closed fully?

U need air for fuel to burn. But u don't want to extinguish the flame when it ignites. So we keep supplying air at minimum rate. Plus if u close it fully while fd fan is running, it would overload the fan to an extent.

4BL73 What is wing clearance in boiler safety valve? 4BL74 Boiler precautions to be taken before starting.

wing clearance = lip clearance

FN 4B+6 BOILERS


Page 4 of 5



http://www.dft.gov.uk/mca/mcga07-home/shipsandcargoes/mcgashiptype/dops_-_all-newpage-33/ds-newpage-76.htm

USEFUL LINK

FUNCTION 6: MREL - BOILERS 6BL1 6BL2 6BL3 6BL4

Why you open vent of boiler during cold starting Boiler gauge glass blow through procedure What will you do if one of the boiler gauge glass is showing very low water level and PID controller how it works? On-board your ship boiler automation failed, safety valve not lifted. What will be your immediate action? How will you continue boiler at low firing rate - If your boiler fuel oil pressure control valve is not working?

FN 4B+6 BOILERS


Sharma Singh Mishra-Barik Piplani

Page 5 of 5



FUNCTION 4B : MEOL - MARINE REF & AC 4RF1 4RF2 4RF3 4RF4 4RF5 4RF6 4RF7 4RF8 4RF9 4RF10 4RF11 4RF12 4RF13 4RF14

4RF15 4RF16 4RF17 4RF18 4RF19 4RF20 4RF21 4RF22 4RF23 4RF24 4RF25 4RF26 4RF27 4RF28

How will you detect moisture in ref system? What will u do to remove it? What is condenser and evaporator pressure? State of refrigerant before and after TEV? What is short cycling and reasons? Explain TEV? In refer plant if there is oil in the evaporator, how will you clean it? Detailed drawing of refrigeration system Reasons for domestic refrigeration not undergoing HP trip. Refrigerant used in air conditioning system? Reefer plant. Why back pressure v/v? What is the function of solenoid? Cut in cut out -cross questions Low refrigerant - How will you get to know? Leakage detection. You carried out leak test rectified and still refrigerant is leaking. Why and from where? Capacity of recovery bottle?

AKSharma AKSharma AKSharma AKSharma AKSharma Barik/Dastoor Kamat/Piplani Kamath Kamath Kamath Kapoor Kapoor Kapoor/Mishra Refrigeration recovery units contain a vacuum pump, which can work to very low vacuums (less than 1 torr), and a condensing unit, which allows the gas to be removed, condensed to a liquid and stored. The unit has either its own (internal) recovery refrigerant container (usually 13 kg) or is connected to an external cylinder (13, 26 or 55 kg). These cylinders are supplied in various colours, the colour may indicate which refrigerant it contains, but it should, in every case, have a yellow band or section around the cylinder neck to indicate that it contains recovered refrigerant.

Reefer short cycle A/C not providing cooling. Reasons? Ref charging methods? Where is the point for charging? Where else you can have the point to charge the refrigerant? Explain method of charging Loading & unloading of AC compressor - Explain Difference between AC compressor & Air compressor unloader Why in Refrigeration system there is Equalising line? What about which is not having Equalising lineHow superheat is created in it ? Difference between AC compressor and air compressor crankcase design and its venting arrangement ? Reefer compressor unloading with diagram Draw refrigeration cycle and principle of refrigeration? Refrigeration lines- Overcharging, short cycling, what if moisture is present? Where heat is added and where heat is removed in refrigeration system? Procedure of refrigerant charging (gas) in ac plant, and what precautions are taken for personal safety? (he wanted to listen hand gloves of leather nd never use rubber hand gloves) Working of TEV? Location of drier in domestic reefer Domestic Refrigerator Compressor type

FN 6 ‐ MROL ‐ EVERYTHING ELSE


Mishra

Mishra Mishra Mishra Mishra Mishra Mishra Mishra Mishra/Trassi Narain Piplani Piplani/Singh Sharma Sharma Singh

Page 1 of 2

MEO CLASS IV ORAL QUESTIONS - MMD MUMBAI 4RF29 4RF30 4RF31

Draw refrigeration cycle? Lots of cross question on this. What is latent heat etc? Everything he wanted to know is how? Safeties on reefer. Why belt driven? Difference between cut out and trips in reference to refrigeration plant ?

4RF32 4RF33 4RF34 4RF35 4RF36 4RF37 4RF38 4RF39

How A.C system capacity control takes place? How to fill Lub oil in a refrigeration compressor? How is the load decided on AC compressor and how does it work? How is the cold room temperature maintained? Whats the difference between air compressor lube oil and refer lube oil properties? Air vent of refrigeration & air compressor difference? Difference between LP cutout and LP controller? what is cascade refrigeration system. tell me construction, how temp is maintained to -165 degree.

4RF40 4RF41 4RF42 4RF43 4RF44

Lube oil charging in ref compressor durin running, Construction of charging v/v What all parameters to be checked in a refrigeration compressor? What are the reasons for suction line getting hot/ cold? Frosting in the suction line... Causes? What is a back pressure valve? And where it is used?

Compiled by: WASIM HUSSAIN N https://www.facebook.com/en.wasim Subramanian

Trassi Cut out is regular operational feature. It needs to manual reset. It resets Trassi automatically. Like LP CutOut / Cut in. But Trips are fault isolation feature... they need to be manually reset after identifying cause.. Like HP Cut Out or LO Low Pr cut out Vaad

FUNCTION 6: MROL - MARINE REF & AC 6RF1 6RF2 6RF3 6RF4

AC compressor short cycling reason Ref compressor- air is present- What will happen? How to charge refrigerant in the system? Type of compressor for AC on your ship? Was vent provided in crank case on it?



Mishra Bhalla/Shirish Mishra/Nair Kamath

Page 2 of 2



FN 4B MEOL - PURIFIERS 4PF1

Purifier overflowing reasons

4PF2

Boiler blowdown procedure?

4PF3

What is main function of gravity disc? What shape? What passes through, what effect of its sizes, how it exactly controls oil water interface? What will happen with wrong selection? How to select exact size? Principle of purifier, draw diagram, why it is necessary to heat the oil, temperature you maintained on your ship for FO and LO? And why that much temp only? How to start purifier? Approach towards rectifying a fault in the purifier and what if oil is leaking? How to select gravity disc? Why we stop purifier with the help of hand brake everytime? e line in purifier Why brake on purifier? Why purifier brakes are applied during stopping. Is there any arrangement that the critical speed is bypassed very fast for purifier. Ans is no. Why do we apply break to purifier at the time of stopping? And what is the arrangement to overshoot the critical rpm at time of starting? Why brake is given to purifier? How is the vertical shaft and horizontal shaft of purifier alligned? What is the function of the friction clutch mechanism used in purifiers? Safeties on Purifier Purifier working principle Manual desludging of Pfx? Safety in purifier ?

4PF4 4PF5 4PF6 4PF7 4PF8 4PF9 4PF10 4PF11 4PF12 4PF13 4PF14 4PF15 4PF16 4PF17 4PF18 4PF19

FN 4B+6 ‐ PURIFIERS

Barik/Neti/Mishra ( we don’t want the v/v & v/v seats of ovbd & boilerside v/v to get corroded, hence Iqbal we first open ovbd v/v then boiler side v/v, then we open the v/v in between these two v/vs & control blowdown by this v/v) Kamath/Piplani

Kapoor

To quickly pass critical rpm. No separate arrangement to avoid it

Mishra Saini Sharma Trassi Trassi Trassi Trassi Trassi Trassi / Barik

Light phase HT alarm Overflow alarm/trip Motor overload/current Back pressure drop shutdown Excess vibration shutdown Low sealing / control water trip" Fuel feed low temp, high temp, low/high pressure alarm Oil in water alarm Bowl speed low/high. Feed flow low Vibration sensor Water pressure high (closing water and outlet)


Page 1 of 2



FUNCTION 6: MROL - PURIFIERS 6PF1 6PF2 6PF3 6PF4 6PF5 6PF6 6PF7 6PF8 6PF9 6PF10 6PF11 6PF12 6PF13 6PF14 6PF15

Purifier overflow, Purifier speed not building after start. Purifier - how the shaft is connected to the motor? what are the arrangements for that? What are friction pads? How are they placed and arranged? In the running purifier how will u come to know that the friction pad is wear down? What are imp parameters in purifier? Explain its effects. Purifier not desludging – reasons & actions Why a Purifier vibrate? What is there to control it? Purifier overflowing reasons? Differences in conventional Alfa Laval and ALCAP purifier? Purifier leaking; reasons Oil from water side of purifier Gravity disk selection Purifier Overflowing, what all things will you check? Probable causes of overflowing Purifier Dissembly What exactly is the paring disc? Is it centripetal pump or water paring device? Given differently in Alfa Laval & McGeorge

FN 4B+6 ‐ PURIFIERS

Bhalla/Shirish Bhalla/Shirish Kapoor Kapoor Kapoor Mish/Nair Mishra Mishra Saini Shirish Shirish Shirish Subramanian Subramanian Wasim Hussain N "PARING" in English means 'spreading or distributing evenly (equally) or making all even (equal)'. I guess, I don't have to explain water paring disc now? ;) In alfa laval, oil is also being collected evenly by another 'paring disc'. In Selfjector, that's called centripetal pump. In the newest Alfa Laval purifiers we have instead, oil paring tube which is spring loaded against inlet pipe and positions itself as per oil water interface and picks up oil.


Page 2 of 2



FN 4B MEOL - COMPRESSED AIR SYSTEMS 4CA1 4CA2 4CA3 4CA4 4CA5 4CA6 4CA7 4CA8 4CA9

Barik Iqbal Kamath Kamath Kapoor Majum/Narain Majum/Narain Majumdar Mishra

Why compressors are there in more than one stage? (Lots of cross questions on this) Why we use intercooler & after cooler? Bumping clearance and cross question. What all factors effect vol. efficiency? Air compressor overhaul and valve overhaul. How to test its properly overhauled? Bumping clearance. What will happen if it is more and if it is less? How is it? PV diagram for Air compressor - Difference between Isothermal/Adiabatic Compression Multistage compression, why, operation, principle, what type of compressor Compressor unloader working, if 1st stage suction and discharge v/v leaking what will be the effect, how lubrication is done, profile for lubrication in comp crankshaft, exact profile.

4CA10 WHAT ARE DIFFERENT TYPES OF COMPRESSOR VALVE?AND PLS DONT TELL HP AND LP 4CA11 4CA12 4CA13 4CA14 4CA15 4CA16 4CA17 4CA18 4CA19 4CA20 4CA21

Mishra

AND IF VALVE SEAT GOES HOW TO REPAIR ? CAN WE LAP VALVE SEAT? Compressor 2 stage PV diagram Compressor specifications and inspection inside crankcase Where safety valve is fitten? Which side and why? Compressor safeties Multistage Compression, PV Diagram, Safeties. Starting air bottle safeties What happens when the fusible plug melts? What all you will check in air compressor crankcase? Why is an air compressor started unloaded? How does the air compressor start and stop automatically? What will happen if the suction and discharge valve of air compressor got interchanged after overhaul?

4CA22 Will the reciprocating compressor work, if direction of motor changes? Explain? 4CA23 In a two stage tandem air compressor adjusting the first stage bump clearance will effect the

bump clearance in the second stage,so how does it work out?

Sharma Singh Singh Singh/Kamath/Vaad Subramanian Vaad Vaad

no air would enter the compressor bcoz in normal case, suction valve is in the position of air to open from the top, if its interchanged wit the discharge valve which is designed to open while air acts from the bottom, it would not open and compressor would not produce any pressurised air!!! Theoretically It will run, but the LO & CW P/p will not run leading to LO & CW no flow trip ... no 1st stage bump clearance adjustment do not effect the 2nd stage clearance coz u add a gasket or shim in first stage at the cylinder head cover bottom...but if u adjust the 2nd stage clearance den it'll definately affect the 1st stage coz u have 2 add shims at d foot of connecting rod..

4CA24 Can we use shims to adjust bumping clearance in air compressors? 4CA25 How does the air compressor start and stop automatically?

FN 4B+6 ‐ COMPRESSED AIR SYSTEMS


Page 1 of 2



FN 6 MROL - COMPRESSED AIR SYSTEMS 6CA1 6CA2

Compressor Valve Inspection. If vlvs of air comp are leaky what will happen? Indication of 1st stage discharge vv leaking?

IQBAL-JHA Kamath

6CA3 6CA4 6CA5 6CA6 6CA7 6CA8

MAC capacity reduced & longer time to fill up the bottle. Reasons? How to start air compressor in manual Compressor taking time to fill the bottle, reason? Compressor intercooler use? Draw 2 stage on graph? What is that graph called? Starting Air Compressor Safeties How will u come to know that your main air compressor is working efficiently, if your 2/E tell you to check the efficiency, what all things u will check?

Kamath Mishra Mishra-Barik Paul Singh Subramanian

FN 4B+6 ‐ COMPRESSED AIR SYSTEMS


Page 2 of 2



FN 4B MEOL - PUMPS AND PUMPING SYSTEMS 4PP1 4PP2 4PP3 4PP4 4PP5 4PP6 4PP7 4PP8 4PP9 4PP10 4PP11 4PP12 4PP13 4PP14 4PP15 4PP16 4PP17 4PP18

Barik Barik Barik Barik/DastUr Barik/Dastur Barik/Dastur Barik/Dastur Barik/Neti Barik/Neti Barik/Neti Iqbal Iqbal IQBAL - JHA Mishra Narain Piplani Sharma Sharma

4PP19

Multi stage pump and its diagram, NPSH of pump Class survey of ballast pump what are your preperations While you stop purifier it starts vibrating - What could be the reason other than critical speed? Casing ring & wear ring location its function How multistage centrifugal pumps connected in parallel &series? It’s application OWS 3 way valve testing Different types of pumps used in engine room Rudder drop. Why rudder drop happens? Jumping Clearance Where you will use centrifugal pump and where you will use reciprocating pump? What is NPSH? Factors affecting NPSH? Draw diagram of gear pump. Why Pump Vibrates? OWS - how it works? What principle? Why do you fill it with sea water? If you start main sea water pump and it trips wht are the reasons? Centrifugal p/p - clearance between wear ring & casing Cargo pump type and their bearing lubrication, details If there are two different types of cargoes in two adjacent tanks- one greater than another. Pump is tripping on overload which discharging higher SG cargo. So how will you discharge cargo of that tank? (Something else, other than heating and cooling) Where emegency bilge suction is fitted ? Which pump and why? How will you test? Who will test? Procedure

4PP20 4PP21 4PP22 4PP23 4PP24

Mechanical seal diagram and function. Function of lantern ring in centrifugal pumps. Bilge line not taking suction? Centrifugal pump - part names If you start main sea water pump and it trips. What are the reasons? How to start sea water pump?

Subramanian Trassi Trassi Trassi Trassi

4PP25 4PP26 4PP27

Centrifugal p/p cross-section, working and for some reason diag of rotation. Wear ring. Gland. Difference between mech seal and oil seal? Bunker line pressure test

4PP28 4PP29 4PP30

Why gear pump not used for emgcy fire pump as it develops high pressure? Difference between centrifugal and gear pump How to check the correct working of 15 ppm alarm?

FN 4B+6 ‐PUMPS AND PUMPING SYSTEMS


Singh

Check load, electrical part, freeness of motor, coupling etc

Vaad XYZ bunker line pressure test with air - 6 monthly done by ship staff. hydrostatic pressure test done by shore staff with certificate provided, uscg requirement only, need not be done if ship doesn't call US ports. that is done by water and then air pressure. it is not done on entire bunker line but only the part which cannot be seen between weather deck and the part where it emerges into the engine room. certification is necessary part for this testing.

Page 1 of 2



FN 6 -PUMPS AND PUMPING SYSTEMS 6PP1 6PP2 6PP3 6PP4 6PP5 6PP6 6PP7 6PP8 6PP9 6PP10 6PP11

Bilge pump suddenly lost suction. What will u check first and after that? Clearances in Gear Pump to be checked? Wear Ring replacement procedure? Wear ring use? Clearance? (0.3 mm) Draw mechanical seal? Uses? Centrifugal pump O/H checks? Replacement procedure for Mechanical seal All S.W. pumps are shut also valves are shut. Start sequence by sequence

dont forget to say will check for the freeness of the motor and pump coupling

Barik/Neti Majumdar Majumdar Paul Paul Paul/Sharma Sharma Trassi's fav

What is the purpose of spring in mechanical seal? How to select gland packing? Sea water on ME lube oil pump – what is your action?

FN 4B+6 ‐PUMPS AND PUMPING SYSTEMS


Page 2 of 2



FUNCTION 4B : MEOL - STEERING GEAR & OTHER HYDRAULIC SYSTEMS HY1 HY3 HY4 HY5 HY6 HY7 HY8

What is Safematic system? Hunting gear, oil flow and safety in steering gear.

Barik/Mishra

Steerig gear test before departure Hydraulic system of windlass. What is the hydraulic symbol of pump and motor?

Mishra

How winches operated on your ship? What are the primary purpose of hydraulic fluid on board? Difference between steering gear motor and other motors onboard

Trassi

Kamat Trassi Trassi steering gear motor does not have a overload trip whereas other motors have. it will not trip on single earth fault...n take 200% overload. steering gear motor is connected to INS (insulated neutral system)...unlike other motors which are connected to ENS (earthed neutral system). purpose is same as told by nishant sharma...i.e. it will not trip on single earth fault. i.e. minimum two earth fault will be required for trip to happen.

HY9

Why the high pressure line (eg: Steering gear system) has Square type flanges and not round ??

HY10 HY12

Draw the 4 ram steering gear and explain how it works? How are the pumps controlled? What is 100% redundancy? What are the follow up,non follow up,and automatic systems of control systems in steering gear?

4FW1

Vacuum loss occurred in fresh water generator. How will you come to know without pressure gauge?

4FW2

Fresh water generator principle?

4FW3

Start the fresh water generator, principle of fresh water generation, working of ejector? How will you start FWG? Fresh water generator.working. Eductor pump working.Salinometer working.. FWG not producing vacuum - Reasons Fresh water generator working and problems Principle of FWG? Reverse osmosis and vacuum FWG?

HY11

Mishra Mishra Mishra Mishra

FUNCTION 4B : MEOL - FWG & FW SYSTEM

4FW4 4FW5 4FW6 4FW7 4FW8

Barik/Dastur The saturation temperature of water is directly proportional to the vapor pressure of the liquid, as the pressure decreases, the saturation temperature of water decreases, thereby if we reduce the pressure well below vapor Kamath/Shirish pressure of the liquid at certain temperature, evaporation takes place. Pressure & Temperature are related by Gay-Lussac's Law : p1/t1 = p2/t2 Kapoor Mishra Mishra Shirish Singh Subramanian

FUNCTION 4B : MEOL - EVERYTHING ELSE 4EE1 4EE2 4EE3 4EE4 4EE5

What is plasticity & elasticity? 2E asks you to cut threads using lathe. How will u carry out the job? Speed of lathe machine? Tools used? Steering gear failure. It is not responding from bridge – Causes? What is the maximum angle did your hose lifting crane moved? Difference b/w cut-out & trip?

FN 4B ‐ MEOL ‐ EVERYTHING ELSE


Barik Piplani Piplani/Nair Trassi Trassi

Page 1 of 2

MEO CLASS IV ORAL QUESTIONS - MMD MUMBAI 4EE6

Vinod

4EE9

Why air vents are provided in tanks? What is jumping clearance? What are the types of welding? How many seachest on board, why high sea chest in port?

4EE10

Difference between relief valve and safety valve?

4EE11

In bunker analysis report what all items are given? (he need details of impurities)

4EE7 4EE8

FN 4B ‐ MEOL ‐ EVERYTHING ELSE


http://www.marinewiki.org/index.php?title=Rudder_-_Swing_test

xyz xyz


Page 2 of 2



FN 6 - MROL - MAIN/AUX ENGINES AND RELATED SYSTEMS 6MAE1 6MAE2 6MAE3 6MAE4 6MAE5 6MAE6 6MAE7 6MAE8 6MAE9

Barik Barik Barik Barik Barik/Dastur Barik/Dastur Barik/Neti Barik/Neti Barik/Neti/Sharma

How to take butt clearance? Gen exh temp onboard Cooling water temp, pr onboard Lub oil temp and pr onboard How to measure ovality of conrod? How piston crown distortion measured? Function and checking of rotocap during overhaul Liner calibration How will you take butt clearance?

6MAE10 What all checks you will make on piston when removed during decarb? 6MAE11 Checks in Crankcase inspection? (Lots of cross questions on this)

Barik/Neti/Sharma/Su bramanian Barik/Subramanian

6MAE12 6MAE13 6MAE14 6MAE15 6MAE16 6MAE17 6MAE18 6MAE19 6MAE20 6MAE21 6MAE22 6MAE23

Piston checks and clearances Air cooler dirty - How will you come to know? Air Cooler cleaning How do you conclude your liner has got crack? How frequently you clean scavenge valves? Draw valve timing diagram of your ship n explain. Engine Holding down bolt torque Crankcase Inspection. Why Secondary Explosion in Engine? Cylinder head overhaul of AE Overhauling of fuel valve of both aux and main engine. Tappet clearance.in detail. How is piston calibration done in A/E

Bhalla/Shirish Bhalla/Shirish Iqbal Iqbal Iqbal IQBAL-JHA IQBAL-JHA IQBAL-JHA Kamath Kamath Kamath Kamath

6MAE24 6MAE25 6MAE26 6MAE27

How butt clearance is taken Reasons for excessive LO consumption What type of edge does the oil scrapper ring has? What is surging? Then went deeper into surging topic came to surging graph about surge line & on graph what is plotted against what? If exhaust gas of M/E for a particular unit has gone up what are the reasons? How to adjust the tappet clearance? Have you taken crankshaft deflection in aux. engines? Where do you fit dial gauge and how it stays there? What locations to take deflections? How the inlet and exaust valve lapping in done? Liner calibration - how is done? Crank case inspection of main engine? Full generator decarb? Butt clearance/ tappet clearance. Liner gauging Cyl head decarb - What are the things you will check? How will you clean all passages? Scavenge temperature of 1 unit increasing – reasons & actions

6MAE28 6MAE29 6MAE30 6MAE31 6MAE32 6MAE33 6MAE34 6MAE35 6MAE36 6MAE37

FN 6 ‐ MROL ‐ MAIN/AUX ENGINES AND RELATED SYSTEMS

(start from when you stop the engine as in he wanted to hear all the safety precautions)

(he wanted answer regarding oil scraper ring worn out)


Kamath Kamath Kamath Kamath Kamath Kamath Kamath/Piplani Kapoor Kapoor Kapoor Kapoor/Kamath Mishra Mishra Mishra/Nair

Page 1 of 5

MEO CLASS IV ORAL QUESTIONS - MMD MUMBAI 6MAE38 Generator not starting on air , reason? 6MAE39 How will you take crank shaft deflection. Why we take two readings in BDC not

Compiled by: WASIM HUSSAIN N https://www.facebook.com/en.wasim Mishra-Barik Mishra-Barik

exactly on BDC reason, 6MAE40 Tappet clearance procedure? Can you take tappet clearance of no. 1 unit inlet valve

NARAIN

on different angles of flywheel other than normal tappet angle on flywheel? 6MAE41 Tappet checking? If fitter does that, how will u verify that he is doing it properly? 6MAE42 How to take compression pressure on running generator? What do u know by taking

Paul Paul

it? How will you take it? 6MAE43 How reversing takes place? 6MAE44 How to take Bottom end bearing clearance in aux. engine? What position is correct?

Piplani Piplani/Kamath

6MAE45 ME main bearing bottom half end removal procedure? 6MAE46 Crank web deflection taking procedure? How to take bottom readings? (Wanted to

Saini Saini

6MAE47 6MAE48 6MAE49 6MAE50 6MAE51 6MAE52 6MAE53 6MAE54 6MAE55 6MAE56 6MAE57 6MAE58 6MAE59

6MAE60 6MAE61 6MAE62 6MAE63 6MAE64 6MAE65 6MAE66 6MAE67 6MAE68 6MAE69

listen about the use of mirror) LO testing Stuffing box if butt clearance decrease and no spares Working of stuffing box? For what used? Crank case explosion Scavenge temperature of 1 unit increasing – reasons & actions Crankcase inspection Bottom end bearing checks after taking out con rod. How is con rod bolt fitted in bottom end bearing and checks made on it? Piston ring; what all clearances are taken and their significance? Scavenge piston space inspection and conclusions Tie rod tension - how u will check? Procedure? M/E Decarb: Piston and Liner (only checks to be made on piston and liner calibration and ovality) How to check tappet clearance? At what degree of crankshaft? How u will know without flywheel marking, without fuel pump inspection window, that your correct position is reached?? What all clearances to check in piston rings, how to take, where to take? How will you come to know that piston rings blow past, when engine is running? & after opening crankcase? Checks made on a new liner before replacing How to put a new liner in a unit? How to take out the old liner? (whole procedure from removing exhaust valve) Indication of scavenge fire How to measure Compression pressure of AE? Hw to check main brg clearance of Aux. engine of underslung crankshaft? How will you check main bearing clearance for aux engine? What particular angle you prefer and why that angle is important? One unit exhaust temperature high during your watch, course of action?



Sharma Sharma Sharma Sharma Shirish Shirish Shirish Shirish Shirish Singh Singh Singh Subramanian

Subramanian Trassi xyz xyz xyz xyz

Page 2 of 5

MEO CLASS IV ORAL QUESTIONS - MMD MUMBAI 6MAE70 Methods for measuring TAPPET CLEARENCE in AE


Dial Gauge Method: In this method the fuel injector is taken out and from the opening a dial gauge is put inside. Then the turning gear is engaged and the engine turned over. The pointer of the dial gauge will move in one direction and then stop and start in opposite direction. The moment the pointer of the dial gauge stops and changes its direction of movement is the TDC of the unit. This method is not normally used in day-to-day practice, but may be used in the calibration of the flywheel if it is not calibrated, or after some repairs Camshaft Method: The camshaft window of the engine can be opened up and the camshaft inspected. The cam of the engine has a base circle, and acceleration and dwell periods. If the roller of the follower is at the base circle, then the particular valve is closed by spring action. When both the exhaust valve and the inlet valve follower are on the base circle, then the unit is also at TDC. It must be remembered that as a four-stroke engine has two rotations of the crankshaft there is one injection TDC where the injection and the combustion take place. The second time the piston is at TDC is when the exhausting of the flue gases takes place. It is very important to identify the combustion TDC, as tappets have to be adjusted at that point. Crankcase Method: In this method the crankcase doors are opened up and the piston is visually checked whether is going up or down. This is the surest method, but a bit cumbersome. It should be used when you have a strong doubt about the other methods.

Valve Spring Method: This is not an independent method but is used in conjunction with the flywheel method. In this method if the flywheel is indicating two units, you can check the springs of both the units. The unit in which the springs are loose is the one at TDC. The caution is that this method is useful for an engine in use. If you have removed the rocker arms during the overhaul and thereafter you want to use this method then it can cause Push rod method:in this method the push rod will rotates or free to move at the time of compression or power stokes,u will get this from flywheel marking, Fuel pump timing method:in this method open the window of inspection door fitted in pumps,when the punching mark is coincide with the mark of pump,ie injection timing,the valves r closed in this time, during this time we will check the tappet clearance 6MAE71 6MAE72 6MAE73 6MAE74 6MAE75

Routine maintenance of auxiliary engines AE clearances ... bottom to top .. and how to take the gudgeon pin clearances. How to detect crankshaft bending? (He wanted to hear crankshaft deflection) What is wedge formation in liner at what position? How to know that there is instrumental error from crank web deflection and readings?



Page 3 of 5

MEO CLASS IV ORAL QUESTIONS - MMD MUMBAI How your engine measures NOx(engine parameter)?


Swapneil Tamhankar 3 methods 1) Engine parameter check method - need to have technical file which states components responsible for nox. - record book of engine parameters -Eiapp certificate 2) Simplified measurement method - onboard verification tests are done during periodical and intermediate surveys, Deviations are to be with 10% of applicable nox limits listed in nox technical file. 3) Direct measurement and monitoring method -sensors installed and records parameters, -last 30 days dats have to be stored. Procedure for direct measurement is In MEPC.103(49) Ship owners are free to use any method of their choice. On my 9 ships in career I have seen only the first method , engine parameter check method as the method used.



Page 4 of 5



All certified engines are delivered with an individual Technical File that contains the engine’s specifications for compliance with the NOx regulation, and the applicable onboard verification procedure. The certification process includes an emission test for compliance with the NOx requirements on the manufacturer’s test bed There are three on board verification procedures which can be used The method used is initially decided by the engine manufacturer, and is usually a specific chapter in the engine’s Technical File. Engine parameter check method Simplified measurement method Direct measurement and monitoring method The engine parameter check ensures that the present state of the engine corresponds to the specified components, calibration or parameter adjustment state at the time of initial certification. The engine’s Technical File identifies the components, settings and operating values that influences the exhaust emissions and these must be checked to ensure compliance during surveys and inspections. The components and settings will be those which affect the NOx produced by the engine, such as: Injection timing Injection system components (nozzle, injector, fuel pump) Injection pressure Camshaft components (fuel cam, inlet- and exhaust cam) Valve timing Combustion chamber (piston, cylinder head, cylinder liner) Compression ratio (connecting rod, piston rod, shim, gaskets) Turbocharger type and build (internal components) Charge air cooler/charge air pre-heater Auxiliary blower NOx reducing equipment The Simplified measurement method is where the NOx content of the exhaust gas is measured during a 20 minute full load run of the engine. Due to the possible deviations when applying the simplified measurement method, an allowance of 10% of the applicable limit value is accepted for confirmation tests and during periodical and intermediate surveys. For the direct measurement and monitoring method, the engine will be fitted with a direct measurement system which monitors the NOx emissions, either as spot checks logged regularly or continuous monitoring. Records must be kept for at least 3 months and must have been taken in the past 30 days.



Page 5 of 5



FN 6 - MROL - EVERYTHING ELSE MEP1 MEP2 MEP3 MEP4 MEP33

Engine room temp How to convert Celcius to Fahrenheit My body temp Steam line leaking in bilges - how will you rectify ? Why is the service tank temperature maintained @ 98 deg and just before fuel pump/fuel injector it is brought to 145-148 deg? Why not maintain service tank @ 145-148 deg? MEP5 Overhaul the sea water suction strainer and add lots of problems in it. MEP6 The oil filter in emergency gen is jammed by which tool you will remove it without MEP7 What is SDNR? How will u lap the valve seat and valve lid? What are the MEP8 LO Cooler leak - How to find? MEP28 Reamer, dye, hack saw, function, type , profile, how will you order? MEP9 During sailing bridge reported that steering gear is not responding in both auto pilot and manual steering. What will you check if your steering gear is of latest MEP10 Hydraulic jack working with simple diagram. MEP11 Welding of two metal pieces of diff thickness. What will you do for the surface preparation of those two metal pieces? MEP12 MEP13 MEP14 MEP15 MEP16 MEP17 MEP18 MEP19 MEP20 MEP21 MEP22 MEP23 MEP24 MEP25 MEP26

Wasim Hussain N Major reason - Can lead to thermal cracking of fuel

Barik Barik Barik Barik Bhalla

Kamath Kamath Kapoor Mish/Nair Mishra Piplani

Wasim Hussain N In short, I would say, If the difference between thickness is more than 3mm (or 4mm) or 25% of thickness of thinner plate, a taper is made on thicker plate of length of taper = 4 times(diff in thickness). Theres more to it. Google that question and go for a link from VERISTAR. It mentions relevant regulations from Bureau Veritas.

Hot oil filter cleaning procedure that lies in main engine fuel line system? Your duty as a 4th engineer on ship? Bunkering sample analysis report; what all is there? Difference between safety and relief valve What are catfines and their relevance? Draw SDR vv. How the spindle is attached with vv? Overhauling of procedure of SDNR valve . How to open if bonnet is stuck? Overhauling of SDRV. Valve not coming out with valve stem. Tapping and jacking Least count of a 0-1inch outside micrometer Plate type HX overhaul Bearing nomenclature Different methods of fixing a leaking pipe - atleast 3 How to calculate least count on micrometer? How will you order a high pressure pipe? Material and property? Construction? Swapneil Tamhankar Tool called as flange separator, it works similar to wedge. Then you have chemical How will you replace joint in SW line without removing pipeline?

Piplani Piplani/Nair

Saini Saini Shirish Shirish Shirish Trassi's fav Trassi's fav Trassi's fav xyz xyz

called as joint remover( ask in store) , it actually burns the joint. This procedure is for without removing pipeline and making a gap between the flanges. MEP27 If u have 200 MT in tank and another bunker came of 500 MT and your tank MEP29 MEP30 MEP31 MEP32 MEP34

capacity is only 400 – what will you do? Sea water pipe , leakage at pipe flange edge and not possible to isolate, how to What is pin gauge? What is the composition of brass ,bronze and gunmetal? What is the type of lubrication in Gears? Why the cap of sounding pipe is spring loaded??



Page 1 of 1



FN 5 - EECEOL EL1 EL2 EL3 EL4 EL5 EL6 EL7 EL8 EL9 EL10 EL11 EL12 EL13 EL14 EL15 EL16 EL17 EL18 EL19 EL20 EL21 EL22

What is the function of commutator in DC motor? What is Fleming’s law? What are the emergency generator requirements as per SOLAS? How will you confirm that the emergency generator has come on load within 45 seconds? How to carry out insulation resistance test? MSB safeties? (Lots of cross questions on this) AVR with diagram Brushless gen with diagram Reverse power trip with diagram Limiting value of IR at which motor will keep on running with insulation leaking Megger testing, how to connect probes How current moves in a conductor. What is the difference between AC & DC? Compare AC & DC with stresses. What will you do if there is low insulation when you start a motor. How will you correct it Overhaul of motor Alarm or trips on steering gear motor. Maintenance on Alternator Safeties on MSB Reverse power trip & testing Power factor definition. How will u calculate it? Wheat stone bridge principle. How it’s balanced? Relation between R1 R2 R3 R4 Megger why used? How to test its working? Types of megger? How does it measure insulation when you are setting a voltage range on it? How will the dynamo work on non-battery type?

Barik Barik Barik Barik Barik Barik Barik Barik Barik Barik Barik Barik Barik Barik/Dastoor Barik/Dastoor Barik/Dastoor Barik/Dastr/Mish Barik/Dastr/Pipla Barik/Dastur Barik/Dastur Barik/Dastur Barik/Mishra

EL23 Type of transformer in welding machine? EL24 What is function of fuses?

Barik/Mishra

EL25 Different kind of fuses EL26 Motor protection

Barik/Neti

EL27 Open circuit fault EL28 Earth circuit fault

Barik/Neti

EL29 Reverse power trip EL30 Generator safeties

Barik/Neti

EL31 Protection in motors for short circuit EL32 Safeties on MSB?

Barik/Neti

EL33 Earth fault indication alarms activated. What step you will take? EL34 Black out occurs on your ship. What will be your action?

IQBAL-JHA

EL35 Paralleling of Alternator: Conditions and Manual procedure EL36 What is single phasing?

Iqbal-W'kde

EL37 Paralleling of generators? (mention all the 4 conditions) EL38 Preferential trip

Iqbal-W'kde

FN 5 ‐ EECEOL

Barik/Neti Barik/Neti Barik/Neti Barik/Neti IQBAL-JHA IQBAL-JHA Iqbal-W'kde Iqbal-W'kde Compiled by: WASIM HUSSAIN N https://www.facebook.com/en.wasim

Page 1 of 17



EL39 Power factor

Iqbal-W'kde

EL40 Trickle charge EL41 Actual electrical parameters on-board your ship and cross ques EL42 What is IP number? What the two digits of it indicate? What was the IP number for motor in the engine

Iqbal-W'kde

EL43 EL44 EL45 EL46 EL47 EL48 EL49 EL50 EL51 EL52 EL53 EL54 EL55 EL56 EL57 EL58 EL59 EL60 EL61 EL62

Iqbal-W'kde Kamath

room, and for MSB? What is Insulation resistance? What is the temperature value for class F insulation? What is earth fault? Why it occurs? Is there any system to monitor in continuously? What is the minimum value of it is allowed? What all ratings of motor are given on its nameplate? What is IP for MSB? IP and significance for motor, what was IP of E/R motors in your ship? Induction motor principle. Starters, why it is required? Star delta starter diagram and explanation. AVR diagram and working. Why it is used? Reverse power trip Preferential trip, what are essential and non-essential loads? Zener diodes. Intrinsic circuit. Where it is used? Explosion proof motor and where it is used. Safeties on overhead crane. Electrical hazards. Fire class motors . Overhead crane limit switch value. Star circuit. Power calculation. Power factor. What is phase angle? Same as MSB + 1.it shud b in the vicinity of the emergency gen. 2. Safety of ESB.

Kamath Kamath Kamath Kamath Kamath Kamath Kamath Kamath Kamath Kamath Kamath Kamath Kamath Kamath Kamath Kamath Kamath Kamath Kamath Kamath

Above upper continuous deck, aft of the collision bulkhead, and shud hv easy access from open deck. 3. Dont forget to tell it shud b dead front type. EL63 Emergency generator Safety. EL64 Types of batteries? Sp Gr? Voltage? Reaction? How will you know battery fully charged? What battery

Kamath Majumdar

on board? It's rating? What is voltage for charging? (26V) Battery maintenance? Hydrometer? Principle of Hydrometer? EL65 What all types of power supply on board? Why 440V in ER and 220/110V in accommodation? Why not opposite? EL66 Types of motor on board? Principle? Synchronous vs induction motor? Where synchronous motor used?

Majumdar

EL67 How to parallel generator? How do you know incoming generator in phase? Synchroscope diagram?

Majumdar

EL68 EL69 EL70 EL71

Fleming left and right hand rule? Lenz’s law? Under voltage trip diagram If two generators are sharing equal load but amps are different How is electricity produced? From where it is tapped? General electrical safeties?

FN 5 ‐ EECEOL

Majumdar

Mishra Mishra Mishra Mishra Compiled by: WASIM HUSSAIN N https://www.facebook.com/en.wasim

Page 2 of 17

MEO CLASS IV ORAL QUESTIONS - MMD MUMBAI EL72 What general safeties you will find in a starter box or near the starter box?


Told him abt fuses and then said there is a rubber mat on the floor near the starter box and indications So he said rubber mat is the requirement now …….. 440v earth fault alarm

EL73 Esb safeties EL74 220v earth fault alarm EL75 Battery charging failure alarm EL76 IR alarm

Mishra

Mishra Mishra Mishra Mishra

EL77 How is earthing given to the ship? What is NER? What purpose? If not given what would happen?

Mishra

EL78 How is earthing given on the shore? EL79 Starter maintenance?

Mishra

EL80 How to test insulation resistance? On the whole what should be the value for entire ship how much it

Mishra

EL81 EL82 EL83 EL84 EL85 EL86 EL87 EL88 EL89 EL90 EL91 EL92 EL93 EL94 EL95

Mishra

should be? How will you check it for the motor ? ESB 440v supplied to ? Emergency generator : means of starting Paralleling, Synchroscope diagram Transformer principle MSB block diagram MSB safeties: Physical and Electrical Emergency generator starting requirements, procedure Power management system block diagram and working Induction motor working diagram and principle Battery maintenance Battery Room Safeties Draw explosimeter What are safeties in E/R overhead crane? What is fail set mechanism? If electrical cargo p/p is der on your ship and you are discharging cargo of Sp.Gr.1. Motor current is 400 A, you change over cargo tank and new tank is of cargo whose sp.gr is 1.8. What will happen? (I tried answering - the pump power consumption will be more so more current will be drawn by motor, if more than over current trip will occur so reduce the discharge rate ) he said he don’t want to reduce the discharge speed then? He gave me another clue that if 2nd cargo pumping draws 600 A current and trip is set at 550A then what will u do? Kamat Sir asked me to use basic engineering knowledge

EL96 What is intrinsically safe equipment? EL97 How do you measure SG of battery acid? Then what is Hygrometer? What is working principle of

Mishra Mishra Mishra Mishra Mishra Mishra Piplani Piplani Piplani Piplani Piplani Piplani Piplani/Kamath Piplani/Kamath Piplani/Kamath

Piplani/Kamath Hydrometer for SG, Hygrometer for humidity In air

Narain / Majumdar

Hydrometer & Hygrometer? EL98 E/R crane safeties EL99 E/R crane motor safeties. Fail-safe of brake & Brake Diagram. EL100 Alternator routines

Sharma

EL101 If your generator working ok but alternator not producing proper voltage? (avr)

Sharma

FN 5 ‐ EECEOL

Sharma Sharma


Page 3 of 17



EL102 Motor maintenance (Megger IR check etc)

Sharma

EL103 Motor safeties

Sharma

EL104 Motor speed control

Sharma

EL105 Difference between synchronous motor and induction motor

Sharma

EL106 Synchronous motor where used in ER

Sharma

EL107 Synchronising how done dark lamp etc circuit diagram

Sharma

EL108 MSB safeties

Sharma

EL109 What happen if generator overload?

Sharma

EL110 Preferential trip in detail

Sharma

EL111 Emergency supply goes to where

Sharma

EL112 Power factor in detail

Sharma

EL113 How to calculate on-board power factor?

Sharma

EL114 When we get power factor=1?

Sharma

EL115 Ships Power Supply system (No diagram but verbally explain it is combination of S/bs, Transformers,

Singh

fuses, contacts, CBs, diff voltages etc.) EL116 Why Starters fitted- function of DOL Starter?

Remember he wants to hear that starter not only for reducing starting current but it is one of the safety-because DOL doesn’t reduces starting current).

Subramanian

EL117 What is Isolation Transformer?

Subramanian

EL118 Principle of Transformers- what happens to current and voltage during transformation?

Subramanian

EL119 Draw and explain Brushless Generator. Residual Magnetism etc

Subramanian

EL120 Navigation Light Panel.

Subramanian

EL121 Motor Safeties.

Subramanian

EL122 Single Phasing, How will you come to know which phase has gone, how will you test?

Subramanian

EL123 Megger working. How to test IR resistance. Why you can’t use multimeter for the same??

Subramanian

EL124 How to use megger, multimeter and tong meter?

Tambvekar

EL125 Safeties of MSB, why 0.6 m gap is given behind

Tambvekar

FN 5 ‐ EECEOL


Page 4 of 17



EL126 Battery checks

Tambvekar

EL127 Procedure for entering battery room

Tambvekar

EL128 Insulation resistance, minimum acceptable value

Tambvekar

EL129 Open circuit fault

Tambvekar

EL130 What are the ESB safeties as per SOLAS

Trassi

EL131 What is MCB and what all trips are provided on MCB

Trassi

EL132 What type of fuses is used in ER? If HRC fuse is blown off what test will u carry out?

Trassi

EL133 What is reverse power trip and how will u carry out the test to check the trip is working?

Trassi

EL134 How to check reverse power trip? Prime mover will be running or not? Then take the gene again on load.

Trassi

EL135 Types of fuses? Explain semi enclosed? Is semi enclosed present in ship?

Trassi

EL136 Power factor. Lot of cross questions

Trassi

EL137 Types of fuses in engine room, how to test a ceramic fuse, what position will you keep the knob of

Trassi

multimeter when testing the fuse? ans is on continuity or resistance, EL138 What type of crane on deck?

Trassi

EL139 MCB trips,

Trassi

EL140 How to check that a 3 phase motor is star or delta connected just by looking at the terminals. Draw the

Trassi

arrangement. EL141 Types of motor use in engine room

INDUCTION MOSTLY, VERY FEW APPLICATIONS OF DC MOTOR (GOVERNOR) AND SYNCHRONOUS

xyz

EL142 Types of induction motors

xyz

EL143 Lead acid batteries its safety battery room ventilation

xyz

EL144 Welding circuit

xyz

EL145 Single earth fault, short circuit fault

xyz

EL146 Short circuit fault safeties

xyz

EL147 Navigation lights – AC / DC?

xyz

EL148 DC motor on board?

xyz

EL149 Difference b\w AC and DC motor?

xyz

EL150 Rectifier? How it works? Example??

xyz

FN 5 ‐ EECEOL


Page 5 of 17



EL151 Transformer? Working?

xyz

EL152 Megger testing

xyz

EL153 How to detect earth fault?

xyz

EL154 Generator trips

xyz

EL155 Alternator trips

xyz

EL156 Describe preferential trip

xyz

EL157 Electric principle of welding

xyz

EL158 How emergency generator does comes on load when main power fails

xyz

EL159 Synchroscope function

xyz

EL160 Power distribution system with diagram

xyz

EL161 Why is a Megger used for insulation test and not a multi meter?

With a megger,a voltage of not less than 500 volts DC is used for testing the insulation resistance of windings. With a multi-meter, the voltage used is not more than 3-volts DC. Megger uses high impedance testing and is therefore more accurate than a multimeter

EL162 How do you test reverse power trip?

When two generators are running in parallel and one generator can carry the load, reverse power trip can be tested by load shifting using governor control. When the load has shifted sufficiently and the off loaded generator is carrying a small percentage of load, its breaker trips and fuel supply to its prime mover cuts off. This means reverse power relay has operated. The relay can be tested by simulation (using the test push button on the relay) to see if it initiates a trip signal. Simulation and actual both can be used to test. In actual change controls to manual. Reduce load one one gen and increase on other. Reverse power will trip at - 10% of rated power .

EL163 Why do we close the switch at 11 o'clock and not at 12 o' clock?

When the synchroscope is approaching 12 o'clock the "slip" (differential) between the sine waves is approaching minimum (slip is zero when the synch'scope is at 12 o'clock) and the voltage differential between the phases is minimal (it's zero when the synch'scope is at 12 o'clock). Due to time taken to close the synchronoscope switch, it is generally done at 11 o’clock. Due to the small delay to close, by doing at 11 o’clock, we are achieving closing close to 12 o’clock.

EL164 Where and why is it used?

Used for power factor correction as a synchronous capacitor.

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MEO CLASS IV ORAL QUESTIONS - MMD MUMBAI EL165 How is the speed of a DC motor varied?

EL166 What does three-phase current mean? EL167 After a black out the emergency generator comes on; On restoring the main supply we are closing the

circuit breaker of the main generator without bothering about synchronizing. How is this possible?


To vary the speed of a DC motor we need a constant voltage power supply with a series POT resistor of higher watt rating. A Pulse Width Modulator (PWM) can be used. Three current sinusoidal waveforms equal in magnitude but with a phase shift of 120 degrees. There is a power link connection breaker between the main generator and the emergency generator. During black out, this breaker trips. The emergency generator starts and its breaker closes and feeds only the emergency loads. During restoration, the main generator is started again and its breaker is closed. As the link breaker is still open, there is no paralleling between main and emergency generator. Ask E/O for more details.

EL168 How is the speed of a 3-phase induction motor varied?

The speed of a normal 3-phase induction motor is a function of the frequency of the supply voltage. Changing the speed of such a motor hence requires building a 3-phase power frequency convertor. This can be realised by using power MOSFETs (or IGBTs) capable of handling high voltages and fast switching speeds.

EL169 What safety precautions need to be taken during maintenance on batteries?

The room needs to be ventilated to prevent explosions due to gases generate by the battery. Protective clothing, gloves and eye protection should be used to prevent acid splash over. No flames or ignition sources should be brought near batteries. Never short both positive and negative terminals as this will cause short circuit and high energy flashover. When disconnecting batteries, always disconnect negative terminals first and vice versa when reconnecting.

EL170 Explain the condition for Paralleling of Alternators?

The following conditions must be fulfilled for proper synchronizing of alternators. The terminal voltage of the incoming machine must be approximately equal to bus-bar voltage. The frequency of the incoming machine must be equal to that of the bus-bar. In the case of 3-phase alternators an additional requirement is that phase sequence of the incoming machine voltages must be the same as that of the bus-bars.

EL171 If you get an earth fault alarm what will you do?

The fault can be investigated by first identifying areas of ship that have a high chance of earth fault (example deck lighting or pantry equipment) and then switching off their supplies one at a time to see if the alarm is gone. When a particular load clears the alarm, we know that that circuit is having earth fault and we can go and repair it.

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EL172 How does current flow during welding?

The current flows through the electrode and to the clamp. That's how it flows in MIG, stick, flux cored. On Tig, the electricity flows through the electrode also except that now that's the only function of it, the rod is held in your hand and electrode in the other.

EL173 What is an AVO meter?

The Avometer was a British brand of multimeter, latterly owned by Megger. It is often called simply an AVO and derives its name from the first letter of the words amperes, volts, ohms

EL174 What limits the electrical load?

The available power is fixed and the voltage is fixed, so the setting of the breaker or fuse is the normal current of the load. If the load exceeds the rated current, then the breaker or fuse will operate and limit the load.

EL175 What is the meaning of saying I and V are in phase?

The angle between the I and V waveforms is zero which means the load is purely resistive. Synchronous motors find applications in all industrial applications where constant speed is necessary. Improving the power factor as Synchronous condensers. Electrical power plants almost always use synchronous generators because it is important to keep the frequency constant at which the generator is connected. Low power applications include positioning machines, where high precision is required, and robot actuators.

EL176 Where is it used?

EL177 What are the differences between synchronous and induction motor?*

Synchronous motor : Constant speed on all loads, can be operated on a wide range of power factors, not self starting, requires dc excitation. Induction Motor : Speed varies with load, operates on lagging power factor, self starting, no dc excitation required.

EL178 What are the safety precautions when working on electrical equipments?

Switch off power, wear proper protective clothing, safety shoes, Notice board : Do not switch on – Men at work, stand on rubber mat, remove metal rings, watch bracelets, use proper insulated tools, check power supply with voltmeter and double check the voltmeter with known power supply, keep one person stand-by with proper safety gears, inform authority and get proper work permit. In case of electrical shock, give proper first aid, check heart beat and pulse.

EL179 Why is special lighting used in battery rooms?

Spark proof lighting is used as explosive gases may be generated during battery charging and so there should be no sparks in the room. Ask E/O for more details.

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EL180 Where is a slip ring used and where is a commutator used?

Slip rings are commonly found in slip ring motors, electrical generators for alternating current systems and alternators. They can be used on any rotating object to transfer power. A commutator is a common feature of direct current rotating machines. By reversing the current direction in the moving coil of a motor's armature, a steady rotating force (torque) is produced.

EL181 When does Reverse power flow?

Situation of a generator is feeding a system through switchgear having several generators connected in parallel with this generator. The flow of current, when the system is running normally, is from the generators to the switchgear. If one generator experiences problems and its terminal voltage falls below the system voltage, the generator will act as a motor, just as a motor can act as a generator, and current will flow from the switchgear to the generator. This is reverse power. The effects can range from minor to extreme in the event of a complete mechanical failure of the generator which fails.

EL182 What protection is provided against this?

Single phasing can be identified by special protective relays which can identify and isolate the connected loads. Smaller motors rely on overcurrent and negative phase sequence relays. Motor protection relays for larger motors come readily fitted with protection against single phasing.

EL183 What is special about Steering gear Overload safety?

Short Circuit protection and were appropriate-single phase protection is fitted. In addition instead of over current protection an Overload alarm is fitted set to operate at not less than twice normal running current. ALSO ASK YOUR SHIP E/O FOR INFORMATION.

EL184 What is rms value?

Root mean square value is the peak value divided by square root of 2 Reverse power protection is used for anti-motoring. This function is used for protection of prime mover not generator. It can cut-off the fuel supply and stop the prime mover.

EL185 How is the protection against reverse power given?

EL186 Where does reactive power go?

Reactive power is not 'lost'. It is delivered to the motor where it sustains the electric field that enables the motor to convert the real power (electrical) into mechanical torque.

EL187 What is the meaning of preferential trip? Why is it provided?

Preferential trip is a kind of electrical arrangement on ship which is designed to disconnect the non-essential circuit i.e. non-essential load from the main bus bar in case of partial failure or overload of the main supply. It lets the critical loads run (like steering gear) and trips the non essential loads (like AC and galley) and is a safety feature

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MEO CLASS IV ORAL QUESTIONS - MMD MUMBAI EL188 What is the meaning of power factor?


Power factor is the cosine of the angle between voltage and current waveform. Power factor improvement capacitor banks are used if the loads are mainly resistive. Power factor close to 1 means for the same real power in kW, the load current is less and hence the I2R losses are less. The system efficiency is higher as the losses are lower. Improved voltage regulation is achieved.

EL189 How can it be improved? EL190 What is the benefit of improving power factor?

EL191 For a given line voltage, four heating coils will produce maximum heat when connected in-

Parallel

EL192 If a motor is wound star and you want to change to delta what should you do?

Open the terminal connection box. Remove the shorting link connecting the common connection (star) point of A2, B2 and C2. With the 3 phase windings marked A1A2, B1B2, C1C2, connect A2 to B1, B2 to C1 and C2 to A1.

EL193 What is the voltage used for ignition in boilers/incinerators etc.?

Normally 10,000V (10kV) - incinerator and around 19k in boilers

EL194 What can be possible reasons for a motor failing to start?

No power , Fuse blown , Overload trip, contactor coil burnt , Contactors contacts bad, control circuit relay faulty, stop switch open circuit and start switch does not operate, hold on contact does not make and motor burnt.

EL195 Explain what happens if a DC motor is fed with AC supply?

Motor will run at low speed, sparking at brushes, heat due to eddy current will finally burn the motor. Motor load currents are large. Motors are 3-phase loads. A higher 440V voltage means lesser current for the same power and hence losses and size of cable wires is lower. Lighting is single phase loads and its load currents are small, hence lower voltage means less insulation in the cable wires. Ask E/O for more information

EL196 Why is 440 V used for motors and 110/220 V used for lighting?

EL197 How to test emergency generator widout switching off main supply

Many methods 1. Simulation switch 2. Tie breaker on esb to be switched off 3. Tie breaker on msb switched off. Any one can be used

EL198 Is the alternator connected star or delta

Look up in Dennis T Hall. Also in your ship ask E/O. Normally star.

EL199 Compare between lead acid and nickel-cadmium batteries?

Lead acid : Dilute H2SO4, spongy and PbSO2, low efficiency, 2 volt per cell, less strong, requires more maintenance, less efficient wrt temperature, discharges fast, low cost, problem of sulfation. NiCd : KOH, Ni & Cd, high efficiency, 1.2V per cell, robust, less maintenance, more efficient wrt temp difference, retains charge for longer periods, expensive, no sulfation.

EL200 Why are motor ratings given in KW and that of alternator and transformer given in KVA?

kW is the output mechanical power of a motor and is expressed in kW. kVA is the net (apparent) power input to the transformer. This input power is the output + losses. kW = kVA x system power factor

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EL201 What is a self-monitoring alarm circuit?

It self monitors the health of the alarm circuit. That is, it senses whether the power supply to the alarm circuit is healthy and all the relays and contacts are functioning normally. Check with E/O for more details.

EL202 What is Under-voltage protection?

It prevents closure of the breaker by mistake, or the generator that is coming on load during parallel operation. It also provides protection against loss of voltage while machinery is connected to the switchboard.

EL203 Why is it different from that for welding?

EL204 How does the emergency generator start automatically?

It is higher as the ignition requires break down of air gap for park to occur. The air breaks down at this high voltage of 10kV. Therefore, it is higher than normal welding voltage. It is activated by a under voltage relay. When there is blackout, the under voltage relay senses loss of voltage and starts up the emergency generator. Similarly when the power is restored, the relay stops the emergency generator. Ask E/) for more details.

EL205 What is the purpose of the earth fault indication on the switch board?

It detects and indicates phase to earth fault on a circuit.

EL206 There is something done to bearing pedestal of an alternator, what is it?

Insulation pads made from nylon are fitted under each pedestal bearing and the bearing holding down bolts are similarly insulated. MAGNETIC INTERPOLES producing opposite ampere turns fitted which minimizes effect of stray magnetic fields causing reduced emf in the shaft.

EL207 What is a diode?

In electronics, a diode is a two-terminal electronic component with asymmetric transfer characteristic, with low (ideally zero) resistance to current flow in one direction, and high (ideally infinite) resistance in the other. A semiconductor diode, the most common type today, is a crystalline piece of semiconductor material with a pn junction connected to two electrical terminals

EL208 Sometimes, when you change the running direction of a E/R blower (from supply to exhaust) it trips.

If the flaps of the blower are not set or opened properly or the filters are clogged, the air supply is affected and the blower may be overloaded causing it to trip. Ask E/O for more information.

Why? EL209 If all your air bottles are at low pressure and there is a blackout how do you start the generators?

If main air bottles are empty, the emergency air bottle can be used to start the main generator. If even the emergency air bottle is empty, then it can be filled by running emergency air compressor (powered by emergency generator). Once the emergency air bottle is filled, this air can be used to start the main generator.

EL210 What is the function of a fuse?

Fuse places a limit on the amount of current that can be drawn by an electric circuit by opening (blowing or melting) when the current exceeds a preset limit. This protects the circuit and the surroundings from fire or damage in the case of an overload or short circuit.

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EL211 What is the regular maintenance done on batteries?

Every week the cell voltage is checked. The specific gravity is monitored using the battery hydrometer. The terminals are lubricated to prevent corrosion. Sometimes load tests are done on the batteries. Ask E/O also for more information.

EL212 Purpose of AVR

During KVAr loading, voltages of alternators falls which can be gained by AVR, which increases the excitation until voltage is back to normal . (NEEDS FURTHER INPUTS & REVIEW)

EL213 How does this cause a rotation to change?

Due to the change in phase sequence, the rotating magnetic field changes direction and the rotor rotates in the opposite direction.

EL214 How is protection provided for OL and SC?

Damage from short circuits and overloads can be reduced or prevented by employing fuses, circuit breakers, or other overload protection, which disconnect the power in reaction to excessive current. The tripping time is much less (in milli seconds) for short circuit due to very high currents but can higher (a few seconds) due to currents say 1.1 to 1.5 times the normal current.

EL215 What is a current transformer and voltage transformer?*

Current transformers used for sensing load currents and as inputs to indicating instruments. Voltage transformers used for step-up / step-down voltages. Contactor is a heavy duty switch whereas the relay is light duty switch. Relays can be as simple as 12 V DC solenoids with 12 V, 0.5 A rated contacts. They are used to detect faults on the power system and signal a local or remote switching device (breaker) to trip the circuit.

EL216 What is a relay? How is it different from a magnetic contactor?

EL217 What is colour code of resistors , Please explain ?

Colours to denote value. In four band colour coding, the first band indicates the first digit, the second band : the second digit and the third band : the number of zeroes. The values are as given below: Black : 0, Brown : 1, Red : 2, Orange : 3, Yellow : 4, Blue : 5, Green : 6, Violet : 7, Grey : 8, White : 9.

EL218 What are the safeties on MSB?

Circuit breakers, fuses and over current relays are used. The panels are dead front panel, that is, we cannot open the panel for maintenance until we switch off the power to the panel by circuit breaker.

EL219 What is capacitance?

Capacitance is the ability of a body to store an electrical charge. Any body or structure that is capable of being charged, either with static electricity or by an electric current exhibits capacitance. C = Q/V where Q is the charge and V is the voltage

EL220 Even though the main engine runs at varying speeds, how does the alternator maintain constant

By use of thyristor controlled frequency (rpm) converters.

frequency? EL221 How is this voltage achieved?

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EL222 How is the direction of rotation varied?

By changing the phase sequence (from say R-Y-B to R-B-Y)

EL223 What is the harm if reverse power flows?

Assume that the generator normally produces an amount of power equal to P, and that when operating as a motor, it will absorb a similar amount, P. Therefore, the net effect on the grid will be the same as if it experienced a step increase in load equal to 2P. Depending on the size of the grid and the strength of the remaining generation, a step increase of 2P could result in a significant frequency change on the grid. There could be prime mover damage in some instances (especially steam turbines).

EL224 If you press the ACB Close button on an idle generator what will happen?

Ask E/O. Normally, the breaker won’t close until you synchronise, so even if you press the breaker close, it will not close. The breaker has under-voltage protection which will not let you close it.

EL225 Apart from renewing bearings is there any reason for opening up motors for maintenance?

Ask E/O. Insulation checks and renewal (example using insulation spray on stator winding insulation) An overload is a current over and above the normal load current (over the load). In other words greater than the original design current. This can be a momentary overload such as the starting current for a motor which is usually ignored or it can be a sustained overload such as plugging in too many appliances at once or a motor that has faulty bearings or gets jammed

EL226 What is the meaning of overload?

EL227 What is an induction motor?

An induction motor is an alternating current motor in which the primary winding on one member (usually the stator) is connected to the power source and a secondary winding or a squirrel-cage secondary winding on the other member (usually the rotor) carries the induced current.

EL228 What is the meaning of excitation in an alternator?

An electric generator or electric motor consists of a rotor rotating in a magnetic field. The magnetic field may be produced by permanent magnets or by field coils. In the case of a machine with field coils, a current must flow in the coils to generate the field, otherwise no power is transferred to or from the rotor. The process of generating a magnetic field by means of an electric current is called excitation.

EL229 Permanent magnets are generally made of-

Alnico alloys

EL230 What is the full form of ACB?

Air circuit breaker. It is normally used at 400V and higher current applications (generator breakers). Air circuit breaker for 400V higher current ratings. Moulded case circuit breaker for 400V medium current ratings. No Fuse Breaker – 75 A capacity

EL231 What is the meaning of ACB, MCCB, NFB?

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EL232 What is a synchronous condenser?

A synchronous condenser is a device identical to a synchronous motor, whose shaft is not connected to anything but spins freely. Its purpose is not to convert electric power to mechanical power or vice versa, but to adjust conditions on the electric power transmission grid. Its field is controlled by a voltage regulator to either generate or absorb reactive power as needed to adjust the grid's voltage, or to improve power factor.

EL233 What is meaning of short circuit?

A short circuit occurs when conductors are connected (shorted) together by a fault. This is normally phase to phase fault due to failure of insulation by something cutting the wires, fires, etc.

EL234 How is the direction varied?

A general purpose DC motor can be reversed by changing the polarity of either the armature or the field but not both. A contactor is an electrically controlled switch used for switching a power circuit, similar to a relay except with higher current ratings. Contactors are used to control electric motors, lighting, heating, capacitor banks, and other electrical loads.

EL235 What is a magnetic contactor? Where is it used?

EL236 What does different position of the synchroscope needle mean; what is the difference between 6 o clock

and 12 clock?

6 o’clock means that out of synchronisation. We cannot parallel the incoming generator. 12 o’clock means the perfect synchronised condition (voltage, frequency and phase sequence match).

EL237 What is the voltage used in a meggar?

500V DC.

EL238 What is the full battery voltage ?

24 V DC.

EL239 What is the voltage available from each cell in a lead acid battery?

2 V DC.

EL240 What is the specific gravity of electrolyte used in lead acid battery?

1280 at full charge and 1180 at discharge.

EL241 What is the best value possible?

1 is the best value possible. That is possible with a purely resistive load.

EL242 Out at sea, if there is a black out during your watch, what action will you take? EL243 Why generally we use induction motor on board, not synchronus motor?

Easy to make. Serves our purpose on board. Easy to operate. Singly excited ac supply is more than sufficient to start and rotate the motor. Induction motors are Used where speed control is not a priority at all but continous running, easy start motors are needed. (ref Theraja for details)

EL244 What is the usual value you see onboard?

0.8

EL245 Can reverse power trip occur with one generator running? If yes, how? If no, why? EL246 Short circuit and Earth fault: Define

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EL247 Star-Delta starter: No diagram jus explain why used on-board EL248 What is KVA? EL249 What is meant by phase in AC? EL250 Why is DC not much in use now? EL251 Where are you likely to see DC used? EL252 What is a semi conductor? EL253 What is doping? EL254 What happens to insulation when temperature rises? EL255 What are Superconductors? EL256 What happens to resistance of conductors when temperature rises? EL257 What is "slip"? EL258 What is a synchronous motor? EL259 How do you use a multimeter? EL260 How do you check continuity? EL261 What do we use for welding on ships? AC or DC? EL262 What is the voltage? EL263 Does current flow through hull during welding? EL264 If so why don't you get a shock? EL265 What is safe voltage to prevent shock? EL266 What is the meaning of earthing in a ship? EL267 What is the meaning of Star winding/ Delta winding? EL268 Is the ship's alternator Star wound or Delta wound? EL269 Can you draw a DOL starter circuit? EL270 What is the normal setting of overload relays? EL271 How does a thermal overload relay work?

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EL272 What is single phasing? EL273 How can it happen? EL274 What is the harm caused by this? EL275 Why is it necessary that incoming alternator frequency is more than bus bar? EL276 What is dark lamp and bright lamp method for synchronizing? How is the connection made? EL277 Why is this reverse power used instead of reverse current in alternators?

CURRENT IS REVERSING DIRECTION EVERY HALF CYCLE IN AC

EL278 Is the field current in an alternator AC or DC ? EL279 Is the field rotating or stationary? EL280 How is it supplied? EL281 What is a brush less alternator? EL282 How is the excitation achieved in this? EL283 What is the meaning of residual magnetism? EL284 What is a zener diode? EL285 What is a thyristor? What is an SCR? EL286 How does an inverter work? EL287 How does a tube light work? EL288 What is the function of the choke? EL289 What is the difference between neutral and earth? EL290 If the AVR, is defective, when additional loads come on will the generator be able to take it? EL291 How do you test reverse power trip, high current trip, preferential trip? EL292 Why is a capacitor used in single phase motors, fluorescent tube lights and electronic circuits.* EL293 while welding onboard a ship the current passes through hull, then why people dont get electric shock?

METAL HULL HAS RESISTANCE THAN BODY

EL294 types of fuses used in ER ,how to test cartridge type fuse (ceramic ) EL295 how to select a fuse ?

BASED ON MAX FAULT CURRENT

EL296 Sketch the types of motor starters. Why timer required in auto transformer and start delta types?

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EL297 How do you trace earth faults? EL298 Trips on an alternator. Motor protection aids? EL299 There is no neutral on board then how do we get 220V supply? EL300 Safeties in Alternator

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Meo Class IV Orals Ques Bank - Mumbai Mmd

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