MEO class IV oral questions

Class IV oral question in MMD Kolkata for function-3,4b &6

1.

Moulded Depth (refer H J Pursey):

The moulded depth is the vertical distance measured from the top of the keel to the underside of the upper deck at side. In wood and composite ships the distance is measured from the lower edge of the keel rabbet. Where the form at the lower part of the midship section is of a hollow character, or where thick garboards are fitted, the distance is measured from the point where the line of the flat of the bottom continued inwards cuts the side of the keel.

2.

Bow Height:

The bow height defined as the vertical distance at the forward perpendicular between the waterline corresponding to the assigned summer freeboard and the designed trim and the top of the exposed deck at side.

3.

Freeboard deck :

The freeboard deck is normally the uppermost complete deck exposed to weather and sea, which has permanent means of closing all openings in the weather part thereof, and below which all the openings in the sides of the ship are fitted with permanent means of watertight closing. In a ship having a discontinuous uppermost deck, the lowest line of the exposed deck and the continuation of that line parallel to the upper part of the deck is taken as the freeboard deck. At the option of the owner and subject to the approval of the Administration, a lower deck may be designated as the freeboard deck, provided it is a complete and permanent deck continuous in a fore and aft direction at least between the machinery space and peak bulkheads and continuous athwardships . When this lower deck is stepped the lowest line of the deck and the continuation of that line parallel to the upper part of the deck is taken as the freeboard deck. When a lower deck is designated as the freeboard deck, that part of the hull which extends above the freeboard deck is treated as a superstructure so far as concerns the application of the conditions of assignment and the calculation of freeboard. It is from this deck that the freeboard is calculated.

4.

Superstructure Superstructu re :

A superstructure is a decked structure on the freeboard deck, extending from side to side of the ship or with the side plating not being inboard of the shell plating more than 4 per cent of the breadth (B). A raised quarter deck is regarded as a superstructure.

5.

Flush deck ship :

A flush deck ship is one which has no superstructure on the freeboard deck.

6.

Upper deck :

The upper deck is the uppermost complete deck exposed to weather and sea, which has permanent means of weathertight closing of all openings in the weather part thereof, and below which all openings in the sides of the ship a re fitted with permanent means of watertight closing. In a ship having a stepped upper deck, the lowest line of the exposed deck and the continuation of that line parallel to the upper part of the deck is taken as the upper deck.

7.

Clear grounds :

Evidence that the ship, its equipment, or its crew does not correspond substantially with the requirements of the relevant conventions or that the master or crew members are not familiar with essential shipboard procedures relating to the safety of ships or the prevention of pollution.

8.

What is flare? What is advantage? (refer H J Pursey)

9.

What is stem? Cross section of stem? Where it connects?Wh connects?What at is coffin plate? Coffin plate connects the stem to the keel . Coffin plate is in fwd and aft end of the keel which joins keel to the stem. (refer H J Pursey)

10.

What is the latest amendment in solas?

11.

Why ships transformers are air cooled and not oil cooled? ( oil may leak, fire hazard)

12.

Can you change the fuel injection timing or stop the fuel flow in one of the 3 injectors in a single unit in RT-flex. Yes, we can stop the fuel through any one injectors at a time. WECS can give signal to any one of the rail valve separately and hence the particular injection control valve will operate and the particular fuel injector will inject the fuel. This improves the injection pressure at low rpm and loads and hence improve combustion.

13.

Maintenance of fire hydrants, hoses and nozzles?

According to SOLAS MSC/circ850, Guidance on maintenance and inspection of fire protection systems and appliances :

14.

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Monthly routine : Fire hydrants, hoses and nozzles must be monthly checked for properly arranged and proper condition.

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Annually routine : All fire hydrants tested for operation. All hoses for hydrostatic load test.

Single Screw pump?Overhauling? Material of the stator(non ferrous)? RUBBER

Single screw pump also called snake pump is normally used as OWS service pump or Bilge pump. Its cross section with part’s material is given below :

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Overhauling of the pump is well understood with the cross sectional view.

15.

What are the requirements of EEBD as stated in SOLAS ?

SOLAS chapter II-I Reg 13.3.4 On all ships, within the machinery spaces, emergency escape breathing devices shall be situated ready for use at easily visible places, which can be reached quickly and easily at any time in the event of fire. The location of emergency escape breathing devices shall take

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into account the layout of the machinery space and the number of persons normally working in the spaces.* The number and location of these devices shall be indicated in the fire control plan required in regulation Emergency escape breathing devices shall comply with the Fire Safety Systems Code. The numbers needed for machinery spaces is undefined and is a departure from the normal prescriptive requirement. Because of the different manning arrangements and machinery space layouts, IMO concluded that it would be not be possible to determine satisfactory carriage requirements. The object of the regulation is to allow personnel to evacuate a dangerous space to a place of safety. It is the owner/operator, through a risk assessment process, and in consultation with the ships crew, who is to determine the number and location of the EEBD's. If a surveyor attending a ship is not satisfied with the arrangements, he/she should ask for the assessment to be repeated in light of deficiencies identified.

16.

Lowering of the life boat?(step by st ep procedure)

17.

Lube Oil level in one of the generators is found to be more when check through the oil level rod. Reasons? ( Jacket water leackcheck expansion tank/ fuel mixed with the lube oil through fuel pump.)

18.

Purifier is overflowing even after desludging. Reasons ? (gravity disc size b igger/ greater feed rate/ oil heat treatment is less)

19.

How the vessel is built? (refer H J Persy)

20.

What is strake and what is the difference btw strake and plate? Strakes are the continuous row of plates starts from aft to fwd of the ship. Each strake are named in SHELL AND EXPANSION plan of the ship. Strake is made up by joining various plates. (For more, read H J persy)

21.

Stealer strakes: At the fwd and aft end ,where the strakes are terminated and merge with each other, various small size (narrow) plates are replaced by adjacent wider plate called Stealer strakes.

22.

Sheer Strakes: The strakes of the side plating nearest to the deck are called Sheer Strakes. These are made up of high tensile steel or of more thickness as sheer strake is subjected to max bending stresses due to its farthest distance from the neutral axis.

23.

Stringer Plate : Deck plating is composed of longitudinal strakes of plating across its width. The strakes or plates nearest to the deck edges are termed as Stringer plate.

24.

Gunwale : Region where the sheer strake meets the Stringer plate is called Gunwale.

25.

What is web-frame? Where it is used? A deep section built-up frame which provides additional strength to the structure. Ships hull may be made up of Transverse web frame, longitudinal web frame or of composite frame structure. (Refer H J persy for web frame)

26.

What is panting beam and how the fluctuating water pressure acts on the ship's hull and panting region? Panting beams are fitted across the ship in each alternate frame spaces in the panting region and are bracketed to the panting stringers. Stiffening in panting region is done by horizontal plate stiffeners fitted vertically not more than 2m apart called panting stringers. Fluctuations in water pressure tend to create in and out movement of the shell plating. At the fore end, where the shell is relatively flat, this fluctuating water pressure effect is greatest.

27.

What is meta c entre, metacentric height, effect of increasing or decreasing metacentric height, righting lever, GM is termed as --? o

For small angle of heel, up to 10 , the vertical through the new centre of buoyancy meet the central line at a point called Metacentre.

28.

SCBA bottle free volume inside and pressure of bottle?

Minimum of 1200lts of air must be compressed in to the scba. Each person avg consumption is 30-40 lts per minute. Hence it can be used for 30 min. Out of which 20% is k ept for safety margin. Hence 24min is for working use. Pr inside bottle is 210-240 bar for a centurion type scba. 90% filled 10%vol free.

29.

Emergency towing arrangement and specification of the rope?

Emergency towing arrangements shall be fitted at both ends on board every tanker of not less than 20,000 tonnes deadweight, constructed on or after 1 January 1996. For tankers constructed before 1 January 1996, such an arrangement shall be fitted at the first scheduled dry-docking after 1 January 1996 but not later than 1 January 1999. The design and construction of the towing arrangements shall be approved by the Administration, based on the guidelines developed by the Organization. Procedure is written in the Emergency Towing Booklet (ETB). A minimum of three copies of ETB should be kept on board and located in Bridge, any forecastle space and Ship’s office or cargo control room. 30. Marpol annex-1 standard discharge connection & the action u have to take when there is leakage from the discharge connection during discharging? Regulation 19 Standard discharge connection

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To enable pipes of reception facilities to be connected with the ship's discharge pipeline for residues from machinery bilges, both lines shall be fitted with a standard discharge connection in accordance with the following table:

Standard dimensions of flanges for discharge connections Description

Dimension

outside diameter

215 mm

Inner diameter

According to pipe outside diameter

Bolt circle diameter

183 mm

Slots in flange

6 holes 22 mm in diameter equidistantly placed on a bolt circle of the above diameter, slotted to the flange periphery. The slot width to be 22 mm

Flange thickness

20 mm

Bolts and nuts: quantity, diameter

6, each of 20 mm in diameter and of suitable length

The flange is designed to accept pipes up to a maximum internal diameter of 125 mm and shall be of steel or other equivalent material having a flat face. This flange, together with a gasket of oil-proof material, shall be suitable for a service pressure of 6 kg/cm 2

Action taken in case of leakage from the discharge connection : The means of communication and signalling must be satisfied by both ships and reception persons. In case of leakage immediately the sludge pump is to be stop and reception persons should be informed. Report it to chief engineer SOPEP should be well understood by the persons involve in the operation and SOPEP kit should always be ready during operation. Use the SOPEP kit and avoid the sludge to be spill ou tboard. If in case the sludge is already spilled, the master must immediately (within 30min) report it to the persons indicated in SOPEP manual. 31. Does the trim changes if the area forward of the collision bulkhead is flooded and how it changes? Yes. As the mass of the water filled in the fwd multiplies by the distance from the centre of floatation makes the trimming moment which will cause the trim.

32. What was the recent accident that occurred in shipping & location & effects th Costa Concordia hits the reef in Giglio on 14 january 2012. Titanic sink (14 april 1912).Francesco Schettino(Captain)

To check that OMD is not giving a false alarm, reset it, if the alarm is not coming again that means it was a false alarm and if it comes again that means it is real alarm. 33.

what is bar keel? draw it.

Smaller vessels such as tugs, ferries, and cargo ships of less than 500 gross tonnage have a single bottom construction. A form of keel found on smaller vessels is the bar keel .Bar keel is having a rect. Cross section and it provide good strength during grounding. But it increases the draft and hence a flat plate keel is fitted in present large double bottom vessels .

34. what is buoyancy tank? An air tight tank near one of the ends of a small boat to keep it from sinking if it capsizes. Buoyancy tanks are the tanks responsible for reserve buoyancy. Reserve buoyancy can be increased/decreased by emptying/filling these tanks. 35. What is prismatic coefficient? Block coefficient? Cp = inverse delta/ (A m x L) 36.

how s statical stability curve drawn? p-90 reeds

37. what r d clearances u ll take in drydock? Ship has to be examined on dry-dock not more than 2.5 years. Special attention is paid on the stern tube, rudder, propeller, shell plating, and external hull fittings. PREPERATION – Collect necessary repair items before docking time is due.

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Send docking plan to shipyard (describing ships requirement like power supply and c.w. supply). Store and spare parts to be receive in time. Make ready instruction manuals. Organise engine room staff for sa fety measures. Work done and clearance taken : Crankshaft deflection taken. Oil tank sounding taken. Tank top hose down and cleaning of bilge well done. Settling and service tank to be topped up. Air bottles to be filled and tight shut while ship on drydock. Fire fighting equipment to be stand-by and in good order. BACKLASH MEASUREMENT. LIMIT OF CHAIN SLACKNESS ( half to 1 link). RUDDER WEAR DOWN (20MM MAX.)(jumping bar clearance and bottom bearing pintle clearance on outboard s ide.) STERNTUBE BEARING WEARDOWN CLEARENCE(propeller drop) ( poker gauge- 2mm max for oil type and 8mm for lignum vitae bearing)- remove the roap guard, turn the propeller so that the mark on the chrome liner meets the mark on the hull, remove the poker gauge plug and drain plug, take measurement from both the side.) TAIL END SHAFT TAPER CLEARENCE FOR CENTRIFUGAL PUMP (.4-.6 mm) THRUST BLOCK CLEARENCE (0.9-1.55 mm)

38. hw 4s diesel eng works? Naturally aspirated : o

-E.O. – 40 before bdc o

- I.O. – 30 before tdc o

- E.c. – 30 after tdc o

- IC. – 30 after bdc Super Charged: o

-E.O. – 50 before bdc o

- I.O. – 80 before tdc o

- E.c. – 60 after tdc o

IC. – 45 after bdc

39.

what s blowpast? causes? whre d blowpast goes

40.

Safety equipments in air compressor?

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Safety valve Bursting disc o

Fusible plug (121 c) Oil separator. Unloader Lube oil low pr Cooling water failure. Relief valve in oil line High temp cutout

F-6

41.

How will you drill hole for fitted bolts in a flange?

First put the markings where the hole is required. Cut the flange piece from the pipe. Put it in the drill machine. Use correct size tool bit. Drill the holes and reweld the flange on the pipe.

42.

hw ll u remove hydrophore pump shaft coupling...it s tight?

43.

wat ll u do if d threads r damaged in a stud? hw ll u correct it?

IF threads are damaged and you can not be able to remove the nut, then we have to cut to stud and remove it. If somehow we can able to remove the stud, then we can rethread it to use it again- first fix it in the chucks of the lathe -fil the weld metal on the surface and fill the threads. -rethread it using lathe.

44.

Purifier motor n vertical shaft r connected. explain complete arrangement?

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if the motor attains full speed does d horizontal shaft rotates at d same speed of motor? Yes, at full speed there is no slip around the friction clutch. F6

45.

hw ll u plug smoke tube boiler leaky tube?

46.

hwll u overhaul a sluice valve?

Sluice valve is a type of gate valve. -first remove the handle. -remove the gland flange and gland. -remove the bonnet. -remove the gate and the spindle now.

47.

what s running direction interlock? hw s d arrangement? hw it s working?(refer arahna)

If the direction of rotation of the engines contrary to the command from the Telegraph, we consider it as the'wrong' direction. In this situation, the fuel cut out servo must operate to shut-off fuel, in case the engine is already running . In addition, the startingair is not allowed to be released, thus preventing the re-starting of theengine in the wrong direction. The Running direction interlock in this engine is connected to the camshaft, and will be operated by the movement of the camshaft. If the camshaft does not reverse, then oil pressure does not act on the fuel cut-off servomotor, as can be seen in the sketch below. Thus fuel is cut-off.

48.

what all places the imo no of the ship is written onboard.

SOLAS Regulation XI-1/3 to require ships’ identification numbers(IMO NO) to be permanently marked in a visible place either on the ship's hull or sup erstructure. Ship identification number 1 This regulation applies to all passenger ships of 100 gross tonnage and upwards and to all cargo ships of 300 gross tonnage and upwards. 2 Every ship shall be provided with an identification number which conforms to the IMO ship identification number scheme adopted by the Organization.{ 3 The ship's identification number shall be inserted on the certificates and certified copies thereof issued under regulation I/12 or regulation I/13.

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4 For ships constructed before 1 January 1996, this regulation shall take effect when a certificate is renewed on or after 1 January 1996.

For the external marking, there are several choices. It shall be marked in a visible place on the stern; or on either side of the hull, amidships port and starboard, above the deepest assigned load line; or either side of the superstructure, port and starboard; or on the front of the superstructure; or, in the case of passenger ships, on a horizontal surface visible from the air For the interior marking, it must be positioned in an easily accessible place on one of the end transverse bulkheads of the machinery spaces; or on one of the hatchways; or in the case of tankers, in the pump-room; or in the case of ships with ro-ro spaces, on one of the end transverse bulkheads of the ro-ro spaces The height of the exterior marking shall be not less than 200mm (7.8 inches) in height, while the interior marking shall not be less than 100mm (3.9 inches) in height. The width of the marks shall be proportionate to the height.

49.

what is howse pipe ,spurling pipe, camber.

Camber is the transverse curved beam to provide more dryness and strength to the ship. It is measured as the height of the deck at central line amid ship above the horizontal line connecting the deck edges.

Sheer is the longitudinal curvature of the ship to provide more dryness to the ship. It is rising from midship to maximum at the end. Fwd sheer is twice that of a ft sheer.

50.

what all places flame detector and smoke detectors are fitted in engine room.

Accomodations: Flame detectors shall only be used in addition to smoke or heat detectors Smoke detectors shall be installed in all stairways, corridors and escape routes within accommodation spaces. Consideration shall be given to the installation of special purpose smoke detectors within ventilation ducting.

Engine room : ( Unmanned Machinery Spaces) : This fire detection system shall be so designed and the detectors so positioned as to detect rapidly the onset of fire in any part of those spaces and under any normal conditions of operation of the m achinery and variations of ventilation as required by the possible range of ambient temperatures. The detection system shall initiate audible and visual alarms distinct in both respects from the alarms of any other system. Different modes of detection for different requirements of spaces like boiler platform, purifier room etc. Detectors are arranged in different section for detecting the exact location of the fire , which is indicating in the fire detection panel in fire control panel.

51. j.c.w test, flywheel & governer function. Jcw test- Nitrate > 1000ppm ( 2ml sample of cooling water + add 4 drops of phenopthelin = sample will turn red. Now add H2SO4 until colour changes from red to blue. No of drops x 75 = ppm of NaNO2(nitrate) If ppm comes between 1000-1500ppm then treatment is ok. Otherwise add Nalfleet EWT 9-108. 2.25lts will increase 1000ppm of nitrate.) Chloride < 50ppm p-alkalinity – min 20ppm ( as soon as after adding 4 drops of phenopthlein and the sample turns red means alkalinity >40ppm)

flywheel- Absorbs kinetic energy and provide this energy during upward piston movement. Dampens the torsional vibration Governer- controls the fuel supply to the engine such as to mantain the constant rpm irrespective of changing load.

Gravity disc – sets the location of oil and water interface. 52. propeller type, crack detection, fractional distillation of crude oil. th

Fractional distillation- (RKPaul sir 8 sem Notes) o

o

Crude oil (storage tank)-------- Primary station---------  furnace------------ Steam heating(325 C)>>Crude oil(575 F) >>Gas o

o

o

Oil>>Kerosene(525 F)>>Naptha(450 F)>>Gasolene(325 F) Crude oil left from above: (If paraffinic)--again to Furnace ------- Residual products (HFO,FO)>> wax >> gasoline o

(If asphaltic)--- to furnace ------  750 C>>Black Residue products>>Heavy LO(gear case oil) >> Medium LO(D/G) >> Light LO(hyd. Oil) o

Atmospheric Distillation : Crude oil is separated in to its constituents by the process of heat only. Heated about 350 C.Lighter products are cooled/condensed and collected.

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Vacuum Distillation : Reduced pressure and high temperature. (Product left from atmospheric distillation undergoes further vacuum distillation. Cracking : Secondary refining-  Either by greatly increased heat OR By using catalyst Catalytic cracking : higher temp and catalyst are used to accelerate the breakup of large molecular structure and hence more high quality and high value products are extracted. o

Thermal Cracking: Raised the temperature and pressure up to 70 bar and 750 C

53.

how d.c.p. work on fire.

It stops the chain r eaction. Cutout the flame. No cooling effect.

54.

diference b/w bulk and tanker...

Bulk- carry dry cargo in bulk ( non liquid cargo such as grain or ore) and having single deck tank side and hopper side tank. Tanker – carries liquid cargo in bulk form.

55.

Hardening and tempering ? o

Normalising : Heating the steel up to a temperature of 850-950 C depending upon the carbon % and then allowed to cool down in air. A hard stong steel with refine grain structure will form. More strength but less ductility then annealing. Relieves internal stresses after forging and casting. It is normaly done to bed plates, A-frames, liners. o

Annealing: Again the steel is heated up to 850-950 C, but cooled slowly in a furnace or an insulated spaces. Softer and more ductile metal will form then normalising. o

Hardening ( Quenching) : Heated up to 850-950 C and then suddenly cooled down by quenching in oil or water. Tensile strength and hardness increases. o

Tempering : This is the process follows after quenching of steel and involves reheating up to 680 C and cooled rapidly. Higher the tempering temperature lower the tensile property of steel.

56.

lifeboat safety.....

Releasing lever interlock. Periodic maintanence of lifeboat engine, battery and davits. Crew members should be trained for onload and offload release. New and improved releasing hooks with increased safety features. Training manuals provide proper lowering and heaving up procedures. Life boat should be able to lowered within 10min. o

o

Life boat is tested for lowering at up to 20 list and 15 trim.

57.

marpol annex6..

rkd/mukherjee-

58.

indicator diagram,indicated power,power card and draw card, clearence and stroke vol.

59. frosting in ref system,causes,remedies;location of bulb and how it is attached,compressor,back pressure v/v 60.

tie rod-fn.location,number;cast steel composition

Tie Rod function is to hold cylinder block, A-frame and bedplate together at all normal running condition. It is given pre-calculated stress so that engine component are in compression. Cast Steel Composition :

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0.4- Carbon 0.6- Si 0.5-1.6 Mn 0.04 phosphorous 0.04 sulphur Other impurities0.3 Cu 0.3 Cr 0.4 Ni 0.15 Mo

61.

c/case inpection..reason,defects,function

62.

piston rod stuffing box-components clearences,name of rings and no.,diaphragm function and mateial.........

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7 rings- 3-4mm clearance is given between each segments. If this clearance is reduced to zero then replace the rings. Spring should be renewed every time the rings are renewed or if the free length of the garter spring is increased by more than 8%.

63.

tappet clearence and purpose

64.

SFOC and hw to calculate

65.

viscosity and why maintain viscosity

Viscosity is the measure of internal resistance of the fluid flow. Fuel oil is heated to reduce the viscosity up to 15-20 cst before injection.

66.

refrigeration cycle , purpose of solenoid v/v

Purpose of solenoid valve is to prevent liquid refrigerant to go to the compressor crankcase when the plant is in stop condition. Also it shuts off when the temp of the room reaches the required temp and hence cut-out the refrigerants flow so that the compressor cutout on low pr suction when the temperature is maintained.

67.

exhaust valve operation

68.

t/c surging

func 6 ,

69.

recharging LO in refrigerant compressor.

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Collect the refrigerant into the condenser by shutting off the condenser outlet valve. Stop the compressor and shut off the inlet and outlet valves of compressor. Open the oil filling plug and start filling the oil slowly. Start the compressor momentarily(0.5- 0.6 seconds) to facilitate speedy charging. After charging to the correct level, tightened up the oil plug.

Bleed off air in the compressor casing by slightly opening the suction valve and loosening connecting caps from the high pressure gauge (In case connection fittings for vacuum pump are provided, use the vacuum pump to extract the air from the compressor crankcase). Extracting Oil i. Pump down the refrigerant into the compressor only. Ensure that refrigerant pressure is higher than the atmosphere. ii. Loosen the oil drain plug in the compressor crankcase and extract the amount oil. Precautions: 1.) Care to be taken when charging oil so that no air will be trapped in the compressor crankcase. 2.) Ensure to bleed off air every after charging and extracting refrigeration oil.

70.

botom end bolts slackening procedure , step by step .

71.

piston ring calibration.

Groove clearences : Necessary because –

to ensure free in and out movement of the ring in the groove to suit the liner bore.

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to allow the gas to pass in the clearance space to press the ring against the liner. If their is cabon deposits in the groove or the groove clearance is too low then gases may pass directly between liner and piston ring outer surface and pushing the ring in to the groove causing Ring collapse. If the Ring clearance is too high then hammering and reduction of piston ring landing surface area in grooves, resulting breaking of ring and liner crack.

Vertical Groove clearance : around 0.4mm and ring should be renewed if it reaches 0.7mm Butt clearance : Will allow thermal expansion. If too large -  blow past. Between 0.5 – 1% of the liner bore. MAXIMUM ALLOWABLE BUTT CLEARENCE IS NOT USUALLY SPECIFIED AS LIMIT OF 15% WEAR ON THE RADIAL THICKNESS OF THE PISTON RING AUTOMATICALLY PUTS A LIMIT TO THE BUTT CLEARENCE.

72.

boiler burner maintenance.

PAGE 59 BOILER NOTES.d

73.

OMD alarm , what will u do ?

First check the OMD is not a false alarm by reset it. If the alarm is again coming, then it is a false alarm. Also to check ( crankcase door become hot, pealing of paint, bearing and piston cooling high temperature). Then proceed.

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74.

what is bore cooling?

bore cooling is a type piston cooling .... .or say a kind of surface cooling ,close to d surface by bore(drilled passage or hole)

75.

what is priming of boiler?

Carry over of water in to the steam line due to sudden increase in l oad (cause swelling) or due to excessive foaming at the boiler surfaces.

76.

what is lost motion in sulzer?

lost motion-in case of sulzer engines, we use servomotor for reversing and during reversing ,for some period of time, the rotation of cmsft is independent of the rotation of crnkshft and if this motion is in reverse direction of the running direction of camshaft, then is so called

lost motion (of cmshft).If this motion is in the direction of the running direction of camshaft(as in MAN B&W) then it is called as gain motion.

77.

What are the safeties in windlass?

mechanical brake, slipping clutch,if hyd driven l.o.low pr trip.l.o.high temp trip.....if ele driven short citcuit,over load protection, single phasing.

78.

how to ensure hatch covers are watertight?

Eccentric wheel should be in up position. It ensures that the steel compression bar is properly pressing the rubber. Securing cleat must be put in will lock the panels.

79.

how to find exact pinhole in p/p suction line?

Remove the non-return valve and then start the other pump and allow water to pressurising the line.

80.

what happens when graphite grease is used when sea water is present?

Grease is a semi solid lubricant consisting of high viscosity mineral oil and metallic soap with filler. Metallic soap are the compound of Ca, Na, Al Filler are Pb, Zn, graphite and Molybdenum. Graphite grease will increase the rate of metallic and galvanic corrosion in presence of sea water. 81.

how pipes r supported to reduce vibration?

By C-clamps provided with lead plate at the bottom to reduce fretting.

82.

what is striker plate

The plate fitted in the bottom of the sounding pipe is known as striker plate. It is above the bottom floor of the tank. 83.

with respect to A/E Piston what is the name of the top most piston ring? How will one identify which piston ring goes in which groove if the rings get intermixed????

Top most ring is known as compression ring Every piston ring has engraved marking....that can be matched with that given in manual. Also can be compare with the sequence in which the piston ring of other piston of the unit is arra nged.

84.

reasons 4 icing on expansion v/v?

85.

crankcase inspection

86.

changing of filter drier of ref. Compressor.

87.

starting of exhaust gas economiser?

88.

Tumble home

Inward fall of the side plating from the vertical as it extended upward towards the deck edges. It improves the appearance of the ship.

89.

why ballast tanks r provided?

To increase/decrease the buoyancy of the ship as required.

90.

garbage nd annex 5

91.

centrifugal p/p o'haul

92.

gland packing change in chintu ji mep oral notes.

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93.

engine room escape routes

Except as provided in paragraph 4, two means of escape shall be pro vided from each machinery space of category A. In particular, one of the following provisions shall be complied with: .1 two sets of steel ladders as widely separated as possible leading to doors in the upper part of the space similarly separated and from which access is provided to the open deck. In general, one of these ladders shall provide continuous fire shelter from the lower part of the space to a safe position outside the space. However, the Administration may not require the shelter if, due to the special arrangement or dimensions of the machinery space, a safe escape route from the lower part of this space is provided. This shelter shall be of steel, insulated, where necessary, to the satisfaction of the Administration and be provided with a self-closing steel door at the lower end; or .2 one steel ladder leading to a door in the upper part of the space from which access is provided to the open deck and additionally, in the lower part of the space and in a position well separated from the ladder referred to, a steel door capable of being operated from each side and which provides access to a safe escape route from the lower part of the space to the open deck. 4 In a ship of less than 1,000 gross tonnage, the Administration may dispense with one of the means of escape required under paragraph 3, due regard being paid to the dimension and disposition of the upper part of the space. 5 From machinery spaces other than those of category A, escape routes shall be provided to the satisfaction of the Administration having regard to the nature and location of the space and whether persons are normally employed in that space. 6 Lifts shall not be considered as forming one of the required means of escape as required by this regulation. Machinery spaces of category A are those spaces and trunks to such spaces which contain: .1 internal combustion machinery used for main propulsion; or .2 internal combustion machinery used for purposes other than main propulsion where such machinery has in the ag gregate a total power output of not less than 375 kW; or .3 any oil-fired boiler or oil fuel unit. Machinery spaces are all machinery spaces of category A and all other spaces containing propulsion machinery, boilers, oil fuel units, steam and internal combustion engines, generators and major electrical machinery, oil filling stations, refrigerating, stabilizing, ventilation and air-conditioning machinery, and similar spaces, and trunks to such spaces. Open decks Open deck spaces and enclosed promenades having no fire risk.

94. margin line nd margin plate Margin line is a line 75mm below the bulkhead deck. If any sinkage, heel or trim resulting in the margin line to b e immersed the vessel is said to be foundered. Margin plate: Double bottom may have a sloping margin leading to the bilge radius plating or a continuous double bottom extended to the side shell. The sloping margin construction required the use of margin plates to connect up with the side framing and provide a collecting well for bilge water. 95. removal of broken stud put molycote If no nut is there on both side, then fit a nut and start tightening it until the stud will c ome out fully. If nut on one side, then put another nut on it (which will act as a locking nut) and start unscrew the inside nut until out. 96.

construction in hotwell to seperate oil

97.

how to check crack in piston ring grooves? By Dry penetration test. By magnetic particle examination test.

stud will come

Rkd/ mukopadhyay

98. additional measures for bulkcarriers,,,3 measures SOLAS CHP XII, Bulk carrier safety :- De-watering system in the forward of collision bulkhead, which is remotely operated from ECR. - Hold no 1 & 2 bulkheads are provided with extra strength. - Double hull construction is recommended for bulkcarriers. If single hull , then extra strength is required on the hull platings and mandatory standard for side strength of single hull is adopted. - All the enclosed spaces should be accessible for inspection ( no narrow spaces ). The double bottom are provided with water tight manholes to inspect the hopper spaces for inside corrosion.

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- Ballast water management room must have a level diagram which shows the level of water so that excess water can be pump overboard. o - Hatch covers are hydraulic sliding type provided with eccentric wheels which can be set up by rotating through 180 so that the panel will sit down and steel compression bar will compress the rubber and ensures perfect watertight integrity. Class surveyor will issue the certificate after checking it. - BLU book. Each operation of bulk carrier loading will be entered in the BLU book by the chief officer. He will documented the even loading and loading calculations. 99. location of detectors, ammendments made and why???? 100. bulbous bow...complete... 3 uses...of fitting it Reduce wave making resistance and hence the fuel c onsumption. Increased the buoyancy forward and hence reduces the pitching of the shi p to some extent. Increases the speed of the vessel. Its plates are thicker in size hence provide strength to fwd structure.

101. piston gland,, scrapper ring ,sealing ring clearances 102. black smoke,, white smoke,, blue smoke Black smoke – poor combustion, poor fuel quality, poor fuel preparation, in sufficient charge air supply , scavange fire, leaky/defective fuel injector, late injection. White smoke: water or excessive air . Turbocharger water pockets cracked, ege water tube leaks, from w.o. tanks. Blue smoke: LO, excess cylinder oil burn, Piston cooling oil find its way to combustion space due to cracked piston crown. Yellow smoke: High sulphur content 103. retractable soot blowers working The blower carriage consists of three separate components: the lance hub assembly, the gearbox and the electric motor. The lance hub housing contains the lance hub, which is supported by two special roller bearings. Because the lance tube is fully retracted from the furnace and cooled through the blowing medium, the long retractable soot blower can be used in areas wi th higher flue gas temperature than any other soot blower type. Retractable property improves the cleaning effect and reduce erosions due to high temperature flue gases. The blowing medium is supplied through an automated poppet valve.

104. accumulation pressure..use????why testing done...why different setting for smoke tube and water tube.... Accumulation pressure : It is the rise in the boiler pressure which takes place when the spring loaded safety valve lift due to increased loading caused by further compression of the spring. High pressure- saturation temp increase and more heat can be stored in the same amount of water. Water tube : High pressure and high capacity Smoke tube : Less pressure and less capacity Water tube boiler Smoke tube boiler 1 Little reserve of water and steam in the boiler. Hence efficient Less stringent control of water is sufficient, as bulk of water is control of water level and exact and frequent dosing of used and heat exchange area is very less as compared to water chemicals is required. tube. 2 High rate of heat transfer across small bore tubes and hence Thick tubes and less heat transfer. positive circulation of water is r equired. 3 Heat exchange area is large , thin tubes may get corroded and pressure should not be increased by 10%of w.p. after damage quickly, so the pressure should not be increased by 7minutes when safety valve already got lifted 10%of w.p. after 15 minutes when safety valve already got lifted. 4 Possible to use high pr and temp. Wider safety margin in Low pr event of explosion. Big size. Saving in space. 5 Small bore tube demands pure feed content hence water Thick and large size bore tube. should be treated properly to p revent scale formation.

105. boiler feed water control...explain complete 3 element control to reduce the swell and shrinkage effect. Boiler water level depends upon the steam flow rate also so it cannot be only control by one element( input) of water level. When the load increases, steam demand increases and the pressure will drop inside the boiler resulting the drop in saturation temperature. Water will start flashing off in to steam causing of formation of a mass of steam bubbles which will increase the water level. This effect is called swell. Similarly when the load decreases, the pr inside boiler start increasing causing the increase in saturation temperature, steam bubbles formation stops and the water level reduces. This is called Shrinkage. Hence to control the boiler water level, keeping in mind the steam and feed water flow rate, 3 element control is used.

106. use of all p+i+d Where the rate of change of error is slow ( like in jcw control, sensor is in middle of tank and steam coil is in the bottom, whatever the o o sensor is reading(say 62 C) will increase slowly after, as the actual temp at the bottom near steam coil is 72 C. Rate of change of error is very slow, here the derivate came in action.

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C(t) = K p.E(t) + K p/Ti . int(E(t). dt + K p.Td dE/dt

107. ogee ring,,, tell tale hole Furnace is attached to the boiler shell by means of an ogee ring. Telltale holes are provided to detect the leakage. If there is a leakage, it will come out from the telltale hole. 108. refrigeration oil separator workin...type complete...why reqd.. Impingment type oil separator: Baffle are provided in the closed vessel. And the vapour refrigerant is allow to pass through these baffles. Oil vapours due to gravity will drained down. Float valve provided will open and send the oil bac k to compressor. BIGGEST DISADVANTAGE OF THE OIL SEPERATOR TO BE FITTED IN THE LINE IS THAT THEIR IS CHANCES THAT THE LIQUID REFREGENT CAN FIND ITS WAY TO COMPRESSOR CRANKCASE FROM THE OIL SEPERATOR WHEN THE SYSTEM IS SHUT DOWN. This can be prevented by : Fitting solenoid valve in the oil return line to compressor crankcase. Heater is provided in the compressor suction.

The same reason , why the master solenoid valve is fitted in the line. It prevents the liquid refrigerant to go in the compressor crankcase when the plant is shutdown.

109. Precautions before sootblow...to protect economiser tubes..( HP boilers) Soot blowing must not to be done if there is an indication of soot fire. Drain the steam line before sootblowing. Engine must be run at full load. Or in HP boiler, the boiler must be firing at full load. The steam used for sootblowing must be saturated or super heated. Inert Gas blower should be checked for stop condition. Inert gas flue gas isolating valve must be in closed position. check it. function3: 110. what is free surface effect? 111. Torsion box,names for all side plates of torsion box Box above the under deck passage in container ship act as a torsion box. It act as a hollow shaft to reduce the torsion stress. In container ships the deck hatch opening are very large hence the torsional stress is quite large. nd Underdeck passage is covered by the stringer plate, Sheer strake, side bulkhead plate and 2 deck plate. These plates are provided wi th great tensile strength and suitably stiffened. Pantoon type covers which are lifted on and off by the container terminal gantry cranes are used as the hatch covers. Deep transverse frame and torsion box collectively take the torsional stresses and the racking stresses. Double bottom is longitudinally framed and laid along the full length of the ship. th Plate floors are fitted at every 4 frame in the cargo spaces and every frame in the machinery spaces. In the pounding region forward, solid floors exists initially at each alternating frame and then at every frame. Tank top plating is increased in thickness in the cargo hold spaces. Pipe tunnels are located in the port and starboard in the double bottom and access is provided via watertight doors from the machinery spaces. Side of the pipe tunnels are formed by the side girder and further intercoastal side girders are fitted in the tunnel space. Containers are supported by the cell guides fitted in the cargo holds for each corner of the containers and angle bar(secure the container to the cell guide) in the holds and on the hatch covers. Lashing arrangements are also provided.

112. maintanance of hydrant hose nd nozzle?coupling name? Hydrants: drains are provided in the line, line should be dra ined after use. Check the condition of the hoses. Hoses should not have water, after use the water should be removed properly. Monthly testing and inspections Monthly inspection should be earlier out to ensure that : all firemans outfits, fire extinguishers, fire hydrants, hose and nozzles a re in place, properly arranged, and are in proper condition; 113. Annex 6 full...ozone depleting banned substances? Chloro flouro carbons R-11(Tri-chloro fluoro methane), R-12(Di chloro Di fluoro methane), R-22( Chloro Di fluoro Methane) etc Incinerator banned substances : PCB (Poly chloro bi phenyl), PVC (Poly vinyl chloride), substances included in annex I,II,III

114. Life boat engine maintanence?how to check engine cooling arrangement Weekly inspection: Lifeboat engine must be run for a minimum 3minutes. Each 3months the lifeboat must be lo wered to sea. Monthly checks: Life boat equipments. fn-4: 115. why piston skirt is large? 1.Soft bronze rings need to be fitted in the piston skirts. These bronze rings help during the running-in of the engine, when the engine is new, and can be replaced if necessary. 2. In two stroke engines having loop or cross s cavenging arrangements the skirts are slightly larger as these helps in blanking off the scavenge and the exhaust ports in the liner

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3. In four stroke or trunk p iston engines the skirt has arrangement for gudgeon pin, which transmits power from the piston to the gudgeon pin or top end bearing. As there are no cross head guides in four stroke engines, these skirts help in transferring the side thrust produced from the connecting rod to the liner walls.

116. why lift of suction v/v is small of air compressor? If the valve has too much lift then the valve closes late nd reduce volumetric efficiency and also its causes valve to close with greater impact nd hence liable to break. 117. how will u decide the size of gravity disc? gravity disc size is decided from nomogram ,its a graph which will give u temp density and siz 118. advantages n disadv of axial turbocharger over radial turbocharger The radial-flow turbine is more simple, but lower flow range capacity and low efficiency. The axial-flow turbine has higher efficiency but more complex structure. In radial flow type, the bearings are in between blower and turbine and hence of split type plain white metal bearing. Func 4: r k das and mukherjee 119. Fuel knock and how u know it? Fluctuation in rpm, after burn(spark from the funnel), smoke from exhaust 120. Scav fire indications 121. Safety and relief valve difference. 122. Definition of suction head and characteristics. Energy required to bring the liquid to the pump’s suction is called the required NPSH. And the pressure drop create by the pump in suction side added to the atmospheric pressure head and the positive suction lift is the available NPSH, that a pump will produce. Available NPSH must always be greater than Required NPSH. Available NPSH = H atm ± Hs –Hvap – Hf – Hv 123. Main air comp safeties. Bursting disc Relief valve Drain separator Cooling water failure alarm Low lube oil pressure alarm Unloader Motor safeties Relief valve on oil side. 124. Refer room defrosting and after that what u do. After defrosting the condensate water should not be allowed to accumulate in the room, it should be drained to prevent the growth of the bacteria lezionellia lionevia 125. Tev equalising connection..why? 126. Pulse and constant pressure turbocharging 127. How u start your watch keeping? The checks u must make on engine control room switchboard.Bottom platform: what all u must check during watch 128. Globe valve overhaul and leak test. leak test : put it in reverse direction, close the valve, if the water coming out from the glands indicating leakage.

129. Dye penetrant test. Cleaning agent, dye, developer. Works on the principle of low surface tension and capillary action. Developer pulls the dye up and makes crack visible 130. Plate type heat exchanger.material of plates and full overhaul and assembly MEP orals

131. 132. 133. 134. 135. 136. 137. 138.

centifugal pump materials, parts, defects, causes boiler type and explain types of rudder( balanced unbalanced semibalanced s nt d ans) reserve buoyancy freeboard markings rudder drop -wt s dat n hw do u take it steering gear motors running overloaded-reasons sopep kit contents

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139. aux eng lub oil system

140. explain d function of equalizing line 141. hw to drain refrigerated space after defrosting hot gas defrosting by electric heaters power switch off 142. 143. 144. 145. 146. 147. 148. 149.

power card draw card draw n xplain tie bolts fucntion effects of too much lubrication of liner crankcase inspection bottom end bearing clearances hw to take for 2 n 4 stroke both boiler hydraulic test -hw it is carried out wt will u do in case of grounding as an engineer auxiliary engine cylinder head overhaul

150. what checks you will make on inlet and exh v/vs springs during overhaul. how they held in position. 151. aux engine main bearing clearance. 152. how will you measure rudder drop. name of the tool. 153. what is the material used for propeller 154. explain the crack detection method. color of die and developer Red colour dye is used. 155. how to seal the engine room before releasing the co2. 156. how a ship is secured in dry dock. 157. how to ventilate a db tank. 158. how an induction motor works 159. name 7 banned materials under annex6 160. types of lubrications 161. Name of fire hydrant coupling – spigot coupling

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Ganguly

162. Sprinkler system requirements ? How to test the system? How to test the sw pump? Motor & general 163. Difference b/w pv valve and pv breaker(Pv valve lifts at 1400mm wg/700mm wg vccm and pv breaker lifts at 2250mm wg/700mm wg )(ganguly normaly ask this quet in motor. Just he wants to hear above values) 164. Your Engine type ? (12 sulzer Rt-flex 96-C and MAN B&W 11k98ME-C6 ) 165. Did your engine can be adjusted for Exhaust valve timings? Why?(YES) 166. Did fuel injectors can be separately injected in both ? (YES) will it increase the combustion pressure? 167. Did refrgrt’n compressor have relief door?(NO) Why not 168. At high angle of heel, did the metacentre changes? r k das and mukherjee fun 3 marpol annex 2 how to measure amount of co2 in bottle and test in co2 pipe details about personal lsa p/v valve in ig system high velocity vent fun 4 m/e lube oil system diagram stuffing box diagram with rings name a/e governer defrosting engine specification.fullform of man.why superlong stroke. fun 6 pressure accumulation test tappet clearence bumping clearence crankcase deflection checks in a stu 1.what is bollard, how it is attached to ship, what is the thickness of plate to which it is attached. 2.what is flare nd why it is provided. 3.every thing about pyro technique. 4.every thing about sprinkler system,all regulations. 5. deference b/w over speed trip and governor, what is the setting for overspeed trip for m/e nd a/e. how will you reset the overspeed trip. 6.raising the steam of boiler frm col condition. 7.wt action will u take after high scavange temp. Alarm . 8.auxiliary engine crankcase inspection. 9. how splash lubrications works. 10.what is phase sequence indicator. how it works. 11.what is commutator . 12.working of dc generator. 13.definition of non essential trip. 14.what is mutual inductance. 15. how will u remove a broken stud. 16.function of back pressure valve. 17.pv valve and pv breaker. 18.what is isolating valve in fire line. it is of which type. 19.what is zener diode. what is its breakdown voltage. .....................asked by das nd some externa

1. life jacket, liferaft - launching manual and HRU, LTA, ETA, pv v/v, pv breaker & there setting presure, marpol annex 5, ductkeel & bilge keel, SCBA all test, TPA, immersion suit ............... 2. single phasing cause and effect, d,c motor, zener diode working, purpose, use, and its break down voltage, back emf............... 3. cylinder linner removal, piston removal, cause of linner crack, roto cap, drawing, working, purpose, overhaul, what to check, and name of upper plate of roto cap, how to take bottom end bearing clearance............ 4. overhauling of reciprocating pump...........

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F3- ig alarms and trips in sequence, Saturday routine, isps , levels of security, lifeboat launching, fix fire fighting system for deck on tankers, concentration of foam solution ,expansion ratio, regulation for foam monitors, fair lead. F4-air compressor safeties, purpose of unloader and maintenance, lubrication in auxiliary engine from sump to all parts including all components with alarms and trips , tappet adjustment in engine having two inlet and exhaust v/vs,tangential runout F5-maintenance of alternators, wher to take air gap ,overhaul of induction motor,how to take alternator on load in dead busbar condition,causes of no voltage in stator while primemover running at its rated speed and remedial action,specification of alternator,checking of emcy generator auto onload operation F6-drydock purpose and intervals, jobs to be done in dd, wat checks to be done on rudder in dd ,jumping clearance (its importance) ,rudder drop measurement where to take,how to change rudder carrier bearings Fn.3 1.freeboard? 2. camber? 3. length between perpendiculars? 4. can it vary? 5. ism? 6. certificates under ism? 7. eebd? eebd pressure? when to use? why to use? 8. deadman lift/deadman arm?Deadman handle (lifeboat winch brake handle) 9. if electric cut between lowering life boat, will it affect lowering? 10. what is the working principle of triggering trip in lowering life boat? Fn.4b 1. how to run the compressor offload? 2. how the tappet clearance can be taken? 3. how the bumping clearance can be taken? 4. why boiler water routine checks is required? 5. what solutions we put? 6. what effects will be done? 7. how many kind of oile recrd books on the ship? 8. what mention in it? Fn.6

1. how can we make thinner internal thread? 2. how to start centrifugal p/p? 3. what will happen if discharge v/v is closed? 4. what will u do if some noise is coming from centrifugal p/p? 5. maintenance and overhauling? 6. generator maintenance at 1000hr Mukopadhyay fun3

1-waht is ism code ,what is time interval of doc smc cerificate survey ? 2-what is isps code,level of security,what should be done in level 3 ? 3-what is bulwark, waht is freeing port ? 4- waht happens to centre of gravity when a hold is flooded ? 5-what is camber,shear and why they are given,relation between aft and forwd shear? fun 4b

1- how quills and lubricator works with diagram,how pressur is developed in lubricator and how pressur is maintained in quills? 2-what are the causes of liner wear down ? when piston rings are stuck or broken what it is called exactly(engineering term)? 3-how bumping clearence is taken what u will do if it is more than required ? 4- is crankshaft able to move axialy,if it does what prevents it, how is thrust taken;full description?

fun6-

1- joint of seawater is leaking,how will you repair,what is tha name of the tool used? 2- how will you come to know shell n tube type cooller tubes are leaking and how to rectify the same?which side cover dia is more in same? 3-how M/E air coller cleanig is done what chemical is used what is interval of cleaning,what is manometer normal pr. and what pr. it should be cleaned ? mukherjee

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-what information is there in damage stability booklet ? -what is funtion of tie rod, material (carbon percentage) (.2-.23%carbon)?how will u check correct tension of the same, how to retighted the same ? - how was your orals, how u have done in ur writtens?

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MEO class IV oral questions

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