MEO Class 4 Oral Questions
From LIFE AT SEA By Nandkishore Gitte
ORAL QUESTION BANK FOR CLASS IV EXAMINATIONS
FUNCTION 1: Marine Engineering HOME 1.
Why is Boiler water treatment required? 2. What is the allowed chloride content? 3. Why is the boiler water circulating pump required for EGB? 4. How does a bourbon pressure gauge work? 5. How do you blow through a b oiler gauge glass? 6. Why is a ball given in the gauge glass? 7. How do you tighten a gauge glass after assembly? 8. What is the setting of a boiler safety valve? 9. What is the normally allowed chloride content in a water tube boiler? 10. How do you blow down a boiler and inspect it? 11. Why is pre purging necessary before firing boilers? 12. How does flame failure alarm come? 13. Type of boiler burner on last ship 14. What is the voltage used for the ignitor? 15. How will you know EGB is leaking? 16. How will you stop the leak? 17. What is the purpose of soot b lowing? 18. When do you start the circulating pump? 19. What is the temperature of steam in the boiler? 20. What is meant by superheated steam? 21. How is a boiler safety valve set? 22. What is the setting? 23. What is the meaning of accumulation of pressure test? 24. How do you blow down a boiler and inspect? 25. How do you repair leaks? 26. How do you blow through gauge glasses? 27. What is the safety mechanism in case the glass b reaks? 28. Which part of a ship's boiler has a higher safety valve setting? EGB or auxiliary? 29. When is the pressure testing of boilers done? How is it done? 30. Why is Fridge compressor belt driven? 31. What is meant by 1 ton of refrigeration? 32. Is there any difference in lub oil pressure readings of fridge compressors when compared to air compresso
33. How do you read the lub oil pressure of fridge compressors? 34. Some times the pressure gauges used in fridge systems also have temperature readings. What is the use 35. How is the temperature of cold room maintained ? 36. What is the role of the TEV? 37. What is mean effective pressure of diesel engine? 38. What is the cooling water treatment 39. What tests are done on L.O.? 40. What is the correct procedure for L.O. sample collection? 41. Exhaust temp of one unit is high; what could be the reason? 42. How is LO for X head lubrication delivered in (B&W/ SULZER Engines) 43. Why is a bursting disc provided in air compressors? 44. Where is it provided? 45. If a bursting disk ruptures, what will be your action? 46. What are the safeties fitted on air compressors? 47. If the interstage relief valve is lifting, what could be the reason? 48. Why is multistage compression used? 49. How will you test the working of a compressor safety valve? 50. How does the Oil mist detector work? 51. How will you test the opening pressure of a crank ca se relief door? 52. How many tie rods will be there? Function of tie rods? 53. What is a lantern ring? 54. What is the role of the Thrust block ? 55. Where is the thrust bearing in MC series or RTA engines? 56. Why is the thrust bearing at the aft end of the engine and not at the forward end? 57. Why is the thrust bearing close to the engine and not close to the stern tube? 58. What is the allowed O2 content in IG? How is it controlled? 59. M/E stuffing box components? 60. What is the role of the stuffing box? 61. What is the difference between stuffing box drain oil and scavenge space drain oil? 62. Why are piston rings changed? 63. What is the difference between a PV breaker and PV valve? What are the settings? 64. Why is deck seal used in IG systems? 65. What are the COPT trips? 66. What is the starting procedure for COPT? 67. 4 stroke Valve timing diagram 68. What are the strokes in 2 stroke and four stroke engines 69. Difference between purifier and clarifier 70. What is the separation principle used in purifiers? 71. What is the relation between oil density and gravity disc diameter? 72. Why are telescopic pipes used for oil lubrication? 73. Why is Fuel timing important? 74. How is checked and adjusted? (engine type based on candidate's experience) 75. What is the principle of a diesel engine? 76. Why are 2 springs sometimes used in inlet and exhaust valves? 77. What will you check in springs during o'haul? 78. How does a roto cap work? 79. How is BHP calculation using indicator diagram done? 80. What is MEP and MIP? 80. What is MEP and MIP? 81. What is the difference between the two? 82. Why is cylinder head fitted in engines 83. Are there engines w/o cylhead? 84. Draw 2s timing diagram 85. Why is an expansion tk provided in jcw system?
33. How do you read the lub oil pressure of fridge compressors? 34. Some times the pressure gauges used in fridge systems also have temperature readings. What is the use 35. How is the temperature of cold room maintained ? 36. What is the role of the TEV? 37. What is mean effective pressure of diesel engine? 38. What is the cooling water treatment 39. What tests are done on L.O.? 40. What is the correct procedure for L.O. sample collection? 41. Exhaust temp of one unit is high; what could be the reason? 42. How is LO for X head lubrication delivered in (B&W/ SULZER Engines) 43. Why is a bursting disc provided in air compressors? 44. Where is it provided? 45. If a bursting disk ruptures, what will be your action? 46. What are the safeties fitted on air compressors? 47. If the interstage relief valve is lifting, what could be the reason? 48. Why is multistage compression used? 49. How will you test the working of a compressor safety valve? 50. How does the Oil mist detector work? 51. How will you test the opening pressure of a crank ca se relief door? 52. How many tie rods will be there? Function of tie rods? 53. What is a lantern ring? 54. What is the role of the Thrust block ? 55. Where is the thrust bearing in MC series or RTA engines? 56. Why is the thrust bearing at the aft end of the engine and not at the forward end? 57. Why is the thrust bearing close to the engine and not close to the stern tube? 58. What is the allowed O2 content in IG? How is it controlled? 59. M/E stuffing box components? 60. What is the role of the stuffing box? 61. What is the difference between stuffing box drain oil and scavenge space drain oil? 62. Why are piston rings changed? 63. What is the difference between a PV breaker and PV valve? What are the settings? 64. Why is deck seal used in IG systems? 65. What are the COPT trips? 66. What is the starting procedure for COPT? 67. 4 stroke Valve timing diagram 68. What are the strokes in 2 stroke and four stroke engines 69. Difference between purifier and clarifier 70. What is the separation principle used in purifiers? 71. What is the relation between oil density and gravity disc diameter? 72. Why are telescopic pipes used for oil lubrication? 73. Why is Fuel timing important? 74. How is checked and adjusted? (engine type based on candidate's experience) 75. What is the principle of a diesel engine? 76. Why are 2 springs sometimes used in inlet and exhaust valves? 77. What will you check in springs during o'haul? 78. How does a roto cap work? 79. How is BHP calculation using indicator diagram done? 80. What is MEP and MIP? 80. What is MEP and MIP? 81. What is the difference between the two? 82. Why is cylinder head fitted in engines 83. Are there engines w/o cylhead? 84. Draw 2s timing diagram 85. Why is an expansion tk provided in jcw system?
86. Why do we Blow through' Engines? 87. How is T/C RPM measured? 88. Is there any difference between A/E and M/E Governors 89. Indicator cards why and how are they taken? 90. What is Hydrodynamic lubrication? 91. What is a rolling contact bearing? 92. What is MCR and CSR? 93. What is PS? What is its relation to kW? 94. What was the specific fuel consumption in your last ship? 95. What was the specific Cyl oil consumption? 96. What is the relation between power and rpm of a main diesel engine? 97. What will be the power developed by a main engine if it runs in DD? 98. What is the relation between the ship's speed and engine power? 99. Will the engine develop any power, if it is run when a ship is aground? 100. What is a CPP? How does it function? 101. What is the difference between fuel valve opening pressure and fuel injection pressure? 102. What is an under slung crankshaft? 103. How many crankshafts are there in Vee type engines? 104. How are connecting rods fitted? 105. Do two stroke engines need tappet clearance adjustment? 106. How will you know, without opening anything, that an engine is 2S or 4S? 107. What are the two strokes in 2S engines called? 108. Why does Sulzer use hydraulic jack bolts for main bearings? 109. What is the meaning of TBN in lub oils? 110. Why is LO of different TBN used for M/E cyl oil and Crankcase oil? 111. What are the values of TBN for A/E crankcase oil? 112. What is the difference between "heat" and "temperature" ? 113. If water is found in crank case lo, what could be the cause?
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FUNCTION 3: Marine engineering HOME practice 1. Explain how will you o'haul a fuel injector 2. Explain how you will change gland packing of a pu mp. 3. What is a SDNR valve? 4. How do you o'haul a globe g lobe valve? 5. How does a gate valve work? 6. If a gate valve is stuck, what could be the reason? 7. How is a job centered on a chuck in a lathe
8. What safety precautions will you take if working on a lathe? 9. What is a reamer? Where is it used? 10. How does a Quick closing valve work? 11. How do you reset a QC valve after operation? 12. Is there any difference between relief valve and safety valve? 13. Explain how will you prepare for Bunkering? 14. How do you set tappet clearance? 15. What are the steps to take after a blackout at sea? 16. How do you pressure test a fuel vale? 17. How will you replace an exhaust valve seat? 18. How do you install a bearing on a shaft? 19. How do you specify pipe size? 20. What do the numbers on bearings mean? 21. What is the common size between different schedules of a pipe? 22. If an A/E does not start what will be your action? 23. Your action if T/C is surging? 24. Why is a Steam trap used in condensate return lines? 25. How is gas cutting done? 26. How many valves are there on a gas-cutting torch? 27. How do you light a gas-cutting torch and adjust the flame? 28. How do you set up a new pipe for welding? 29. What is GPR/GPO/LH electrodes? 30. How do you select the correct current setting for welding? 31. Crank pin brg clearance
32. Telescopic feeler gauge 33. Piston removal procedure 34. Welding defects? 35. Bridge gauge main brg clearance 36. How does a Stud extractor work? 37. How does a chain block work? 38. What are the safeties on cargo cranes ? 39. What are the safeties on ER crane? 40. How is the load controlled during lowering? 41. How is the E/R crane load tested? 42. Fuel valve not coming out? 43. Setting exhaust valve timing 44. Pumps o'haul? 45. Type of drill bits? 46. Types of threads? 47. Pipe schedule? 48. Important dimensions of flanges? Types of flanges? 49. Indications of scavenge fire? What action will you take? 50. Where are wear rings used? What is their purpose? 51. Boiler gauge glass? Reflex type? Blow through procedure? 52. .ISSA code book? 53. SG hunting gear? 54. Axe blade? How fitted? 55. Load test?
56. SCBA pressure testing 57. Welding surface preparation 58. No water in GG ? What action 59. Flaring tool 60. What is an ermato joint? 61. Why is a copper gasket annealed ? 62. How will you supervise a lub oil Filter cleaning? 63. What precautions have to be taken during cleaning of SW line filters? 64. What is a Dead mans alarm 65. What will be your action if your Reliever appears drunk 66. Your oiler appears drunk. What is your action? 67. Compound gauge? 68. Method of blowing through gauge glass 69. Pump shaft broken? Suggest epairs? 70. What is Gear Back lash? 71. What are different types of gears seen in ship? 72. What is hunting tooth 73. Why is gear oil different others? 74. What are the different types of Taps and Dies? 75. Why do you take Ullages? How do you calculate liquid quantity? 76. What is VRF? 77. What do you check up while opening piston? 78. Q closing valve operation? Why do you shut the valve again before opening? 79. Start airline getting hot - what action?
80. Draw a LS of ball bearing fitted on a shaft. 81. What is a lip seal? Sketch 82. Sketch a mechanical seal. 83. Exhaust bellow sketch? 84. What is a dresser coupling 85. What is Bumping Clearance? How do you measure it? 86. Why is a centrifugal pump started with its discharge valve shut? 87. How will you align a pump to its motor? 88. What checks will you make on a bottom end bearing bolt? 89. How do you measure ovality of a crank pin? 90. How does hydraulic tightening work? 91. Why is the jack turned back a little while slackening? 92. What will you check in UP space inspection? 93. How will you do crankcase inspection? 94. Shipside valve is leaking into E/R. What will you do?
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FUNCTION : Electro technology and control enginee HOME
1. What is KVA? 2. What is special about Steering gear Overload safety? 3. Explain the condition for Paralleling of Alternators? 4. What does different position of the synchroscope needle mean; what is the difference between 6 o clock and 12 cloc 5. Why do we close the switch at 11 o'clock and not at 12 o' clock? 6. Why is a Megger used for insulation test and not a multi meter? 7. What are the safeties on MSB? 8. When does Reverse power flow?
9. What is the harm if reverse power flows? 10. How is the protection against reverse power given? 11. How do you test reverse power trip? 12. What is the full form of ACB? 13. If you press the ACB Close button on an idle generator what will happen? 14. What is Under-voltage protection? 15. What is the meaning of preferential trip? Why is it provided? 16. What is the purpose of the earth fault indication on the switch board? 17. If you get an earth fault alarm what will you do? 18. What is Direct Current? 19. What is alternating current? 20. What is meant by phase in AC? 21. Is there phase in DC? 22. Why is DC not much in use now? 23. Where are you likely to see it used? 24. What does three-phase current mean? 25. What is rms value? 26. What is the meaning of power factor? 27. What is the usual value you see onboard? 28. What is the best value possible? 29. What is the benefit of improving power factor? 30. How can it be improved? 31. What is the meaning of saying I and V are in phase? 32. What is the difference between KW, KVA and KVAR? 33. Why are motor ratings given in KW and that of alternator and transformer given in KVA? 34. Where does reactive power go? 35. What is a semi conductor? 36. What is doping? 37. What happens to insulation when temperature rises? 38. What happens to resistance of conductors when temperature rises 39. What is an induction motor? 40. What is "slip"? 41. What is a synchronous motor? 42. Where is it used? 43. How do you use a multimeter? 44. What is an AVO meter? 45. How do you check continuity? 46. What limits the electrical load? 47. What is the voltage used in a meggar? 48. How does current flow during welding? 49. What do we use for welding on sh ips? AC or DC? 50. What is the voltage? 51. What is the voltage used for ignition in boilers/incinerators etc.? 52. Why is it different from that for welding? 53. Does current flow through hull during welding? 54. If so why don't you get a shock? 55. What is safe voltage to prevent shock? 56. What is the meaning of earthing in a ship? 57. What is the meaning of Star winding/ Delta winding? 58. Is the ship's alternator Star wound or Delta wound? 59. What is the meaning of ACB, MCCB, NFB? 60. What is a magnetic contactor? Where is it used? 61. What is a relay? How is it different from a magnetic contactor? 62. Can you draw a DOL starter circuit?
63. What is the meaning of overload? 64. What is meaning of short circuit? 65. How is protection provided for OL and SC? 66. What is the function of a fuse? 67. What is the normal setting of overload relays? 68. How does a thermal overload relay work? 69. What is single phasing? 70. How can it happen? 71. What is the harm caused by this? 72. What protection is provided against this? 73. Why is it necessary that incoming alternator frequency is more than bus bar? 74. What is dark lamp and bright lamp method for synchronizing? How is the connection made? 75. Apart from renewing bearings is there any reason for opening up motors for maintenance? 76. Why is reverse power protection required? 77. Why is this reverse power used instead of reverse current in a lternators? 78. What is the meaning of excitation in an alternator? 79. Is the field current in an alternator AC or DC ? 80. Is the field rotating or stationary? 81. How is it supplied? 82. What is a brush less alternator? 83. How is the excitation achieved in this? 84. What is the meaning of residual magnetism? 85. Why is an air compressor started unloaded? 86. How is the speed of a 3 -phase induction motor varied? 87. How is the direction of rotation varied? 88. How does this cause a rotation to change? 89. How is the speed of a DC motor varied? 90. How is the direction varied? 91. What is a diode? 92. What is a zener diode? 93. What is a thyristor? What is an SCR? 94. How does an inverter work? 95. How does a tube light work? 96. What is the function of the starter in a tube light? 97. What is the function of the choke? 98. Where is a slip ring used and where is a commutator used? 99. What is capacitance? 100. Does current flow though a capacitor? 101. What is the unit for capacitance ? 102. What is a neutral? 103. What is the difference between neutral and earth? 104. What is a synchronous condenser? 105. Where and why is it used? 106. If a motor is wound star and you want to change to delta what should you do? 100 If the AVR, is defective, when additional loads come on will the generator be able to take it? How do you test, reverse power trip, high current trip, preferential trip? 102. What is residual magnetism? Where is it important? 103. Sometimes, when you change the running direction of a E/R blower (from supply to exhaust) it trips. Why? 104. What is the function of the friction clutch mechanism used in purifiers? 105. What is the regular maintenance done on batteries? 106. What safety precautions need to be taken during maintenance on b atteries? 107. Why is special lighting used in battery rooms? 108. What is the voltage available from each cell in a lead acid battery? 109. What is the full battery voltage ?
110. How is this voltage achieved? 111. What is the meaning of a normally open contact? 112. How does a Salinometer function? 113. How does the air compressor start and stop automatically? 114. How is the cold room temperature maintained? 115. What is a self-monitoring alarm circuit? 116. Out at sea, if there is a black o ut during your watch, what action will you take? 117. After a black out the emergency generator comes on; On restoring the main supply we are closing the circuit brea generator with out bothering about synchronizing. How is this possible? 118. How does the emergency generator start automatically? 119. If all your air bottles are at low pressure and there is a blackout how do you start the generators? 120. What is a shaft generator? 121. Even though the main engine runs at varying speeds, h ow does the alternator maintain constant frequency? 122. Is the alternator connected star or delta 123. Why is 440 V used for motors and 110/220 V used for lighting?
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FUNCTION: OPERATION OF THE VESSEL AND SAFETY PERSONNEL ONBOARD
1. Fire main line fittings 2. Purifier room fire 3. Paint locker fire 4. CO2 flooding procedure 5. Uptake fires 6. O2 and C2H2 storage and operation safety 7. EPIRB and SART
8. SOPEP 9. LB brake/ lowering procedure 10. 103.Deck foam system? 11. 104.Where isolation valves given in fire main? 12. What is hydrogen fire? 13. What are the indications of EGB fire? 14. 2.DCP fire extinguisher? 15. Routine checks on FFA 16. Flammability diagram 17. In your kitchen what fuel is used 18. Why is the flame not traveling to the cylinder 19. LEL, UEL 20. Flammability range? 21. Between a log and a small stick which burns faster 22. When you blow on a matchstick the fire goes out. In a stove/or a black smith's hearth blowing air increases the fire. 23. Why is a Relief Valve fitted on fire main? 24. International shore connection; Size? Where fitted? Which part is standard? 25. Enclosed entry procedure 26. ELSA, EEBD 27. 33 Fire main line isolating valves 28. How does a flame screen work? What is the difference between a flame screen and a flame arrestor? 29. What is a flashback arrestor? 30. Why should Acetylene bottles be used in the upright position? 31. What is the correct position for using a portable foam extinguisher?
32. Why is a sand box provided on the boiler flat? 33. What are gas-free conditions for man entry? 34. Should the ventilation blower be running in supply mode or exhaust mode, when the Oxygen check is made? 35. In a tanker, why are bonding straps used on cargo pipelines? 36. What is the rating of the electrical hand glove? 37. What is the important first aid for an electrical shock victim? 38. Is there any protection for a CO2 cylinder in case of a fire in the CO2 room itself? 39. Is the CO2 in the bottle in liquid condition or gas? 40. How does the CO2 alarm ring when the panel door is opened? 41. Can engine room bilges be pumped out in special areas? 42. What will be your action when you discover smoke coming out of 43. During your watch, if you get a under p iston temperature high alarm, what will you do? 44. During your night duty on a UMS vessel, there is a fire alarm from E/R. What will be your action in case of Top a. Purifier room fire b. Running generator exh manifold on fire c. Boiler front on fire d. Bilges on fire 45. 102.CO2 and DCP difference? 46. Man overboard drill 47. Oil spill drill 48. Life raft floatation 49. Ship's Whistle? How does it work? Where is it fitted? 50. L boat tricing pendant / Bowsing in tackles; Purpose.
51. What is HRU? How does it work? Where is if fitted? 52. What is a Life buoy? Where is it fitted? 53. What is flash point, firepoint and auto ignition temp. 54. What are the tests done before enclosed space entry? 55. What spaces are defined as such? 56. What is the acceptable HC level for man entry? 57. What is TLV? How many types are there?
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FUNCTION: SHIP CONSTRUCTION AND STABILITY HOME 1. Deep tank construction 2. Garboard strake, sheer strake 3. Stability and buoyancy 4. Collision bulkhead 5. Camber, margin plate, intercoastal? 6. Free surface effect? 7. Static and dynamic stability? 8. LOLL, GZ,righting lever 9. Pounding effect on rudder 10. What are Skates? 11. Types of floor 12. How ship turns? Rudder function?
13. Why is rudder angle not more than 36 deg? 14. How does the ship move? Propeller function? 15. Why is the thrust bearing fitted aft? 16. What action will you take if there is a thrust bearing high tr alarm? 17. What is a "Torsion Box" in a container ship? 18. Protection/safeties on a generator 19. What is metacentric height? What is its importance? 20. What is dynamic stability? What is its importance? 21. What is a chain stopper? 22. What is a dead man b rake? 23. How many brakes are there on a life boat winch?
N GITTE
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1.What is stroke? 2.RPM of Low, Medium and High speed engines? 3.Discuss Otto cycle, Diesel cycle, Dual cycle and Actual cycle 4.Timing diagram of 2-stroke engine 5.Timing diagram of 4-stroke engine 6.Difference between 2-stroke and 4-stroke engine? 7.Material of Piston, Connecting Rod, etc. 8.What is Cross flow, Loop flow and Uniflow scavenging?
9.What is over speed trip and how it works? 10.
Types of IC engines
11.
What is stroke to bore ratio?
12.
What is mean effective pressure?
13.
What is turbocharger?
14.
Why air is passes through the air cooler?
15.
How you prepare Main engine in 1 hour notice?
16.
What is the purpose of cylinder relief valve?
17.
At what speed air break for main engine can be given?
18.
Causes of water coming out during blow through?
19.
Procedure to take over a watch?
20.
What is dead man's alarm?
21.
How to take the liner calibration?
22.
How many types of fuel pumps are used in marine diesel
engines? 23.
What action you will do after De-carbonization of an auxiliary
engine? 24.
What will be your action on a vibrating turbocharger?
25.
How to overhaul a fuel injector?
26.
What are main engine safety devices?
27.
How differential pressure switch works?
28.
What is CPP?
29.
What is the difference between SMC and ordinary engine?
30.
How will you decarbonise your main engine?
31.
Why noises coming from telescopic pipes?
32.
How oil mist detector works?
33.
How to remove crankshaft?
34.
How to take crankshaft deflection?
35.
How will you take tappet clearance?
36.
How will you check main, big end, thrust and cross head
bearing clearances? 37.
What are the normal clearances obtained?
38.
What are the causes of sudden over speed of main engine?
39.
What are the causes of engine power loss?
40.
What are the causes of speed fluctuation of engine?
41.
What are the causes of reduced compression pressure?
42.
What are the causes of knocking?
43.
What is ignition delay and how to reduce it?
44.
What will you do for proper atomisation?
45.
What is the difference between clearance volume and swept
volume? 46.
What is overlapping in fuel timing?
47.
What is the material of cooler tubes?
48.
What is stuffing box?
49.
What are the rotating mechanism of exhaust valves?
50.
How is lube oil for cross head is delivered?
51.
What is the difference between stuffing box drain
and scavenge drain oil? 52.
What is the role of thrust bearing and location?
53.
Why fuel timing is important and how the same is checked?
54.
How BHP is calculated with indicator diagram?
55.
Why expansion tank is provided in jacket water system?
56.
What is the difference between auxiliary and main engine
governor? 57.
What do you understand by specific cylinder oil consumption?
58.
What inspection you carry out after grounding of the vessel?
59.
What is supercharging?
60.
What is the difference between RTA and RND engine?
61.
Describe rudder dismantling?
62.
Describe propeller dismantling?
63.
What are main engine interlocks?
64.
What is crank case explosion and how it occurs?
65.
Scavenge fire reasons and remedy?
66.
Explain about exhaust gas heat recovery system?
67.
Causes of starting air line explosion?
68.
Why tappet clearance is needed?
69.
Describe crankcase relief valve?
70.
What is starting air overlapping
71.
What are the difference between naturally aspirated engine
and supercharged engine? 72.
What are the functions of turbocharger inducer, diffuser,
diaphram and labyrinth seal? 73.
What is turbo charger surging?
74.
Describe constant pressure and pulse type turbo charger.
75.
What is the quantity of lube oil in 4 stroke and 2 stroke
engines?
General Engineering Knowledge 1.What is glide? 2.Describe bunkering procedure? 3.How the tail shaft sealing arrangement is done? 4.What are the measures you will take if the gland packing leaks continuously? 5.Why intermediate shaft is given? 6.How will you take out the valves of air compressor?
7.During dry dock what will you check in seachest valves? 8.What are the safeties of air compressor? 9.What is Heleshaw pump? 10.
Define valves and cocks and their functions
11.
Which valve is suitable for remote controlled operation and
why? 12.
What is rudder drop and jumping clearance?
13.
Where and why bursting disc is provided in an air
compressor? 14.
What are reasons of lifting up inter stages safety valves in an
air compressor? 15.
How to test compressor safety valve?
16.
How will you overhaul a globe valve?
17.
What are the reasons for a sticking gate valve?
18.
What is the theory of density correction?
19.
How does quick closing valve function?
20.
How do you specify pipe sizes?
21.
How do you select correct current setting for welding?
22.
What is the common size between different schedules of
pipes? 23.
Where telescopic feeler gauges are used?
24.
What are the safeties of cargo crane?
25.
What are the safeties provided on engine room overhead
crane? 26.
Where are wear rings used?
27.
What is hunting gear?
28.
Explain welding surface preparation?
29.
Draw a lip seal and how it works?
30.
Who will you align a pump and its motor?
31.
Sketch exhaust bellow?
32.
What are the testings carried out on steering gear during a
drill? 33.
Mention fresh water generator shell temperature, vacuum, and
other parameters? 34.
What is the significance of stern tube header tank?
35.
What are the advantages of four ram steering gear?
36.
Describe checks on fresh water generator during watch?
37.
What is the significance of greasing steering gear?
38.
What is reverse osmosis?
39.
What is purifier and clarifier?
40.
Discuss purifier operation?
41.
What are fuel oil testings done on board ships?
42.
What on board tests are done in lube oil?
43.
What is the correct procedure to collect lube oil for testing?
44.
What is the temperature of fuel oil entering and leaving
purifier? 45.
What are the safeties of fresh water generator, steering gear
and oily water separator? 46.
Why purifier overflows?
47.
What is viscometer?
48.
What is the function of air compressor unloader?
49.
What is the function of expansion valve?
50.
How the unloader works in an ac compressor?
51.
Why fridge compressor is belt driven?
52.
How is the temperature of cold rooms maintained?
53.
What is he difference between air compressor and ac
compressor? 54.
What is critical temperature and pressure?
55.
What is latent heat?
56.
What is meant by short cycling in fridge compressor?
57.
Different types of pumps and where they are used?
58.
What is the discharge pattern of reciprocating pumps and
other pumps? 59.
What is jumping clearance?
60.
How many types of steering gear are there?
61.
Describe arrangement of stern tube?
62.
How stern tube cooling is done?
63.
How to take crank shaft deflection?
64.
Why the suction pressure of refrigeration plant and ac plant
are different? 65.
What is the function of rudder carrier bearing?
66.
How many types of fresh water generator are there?
67.
Why centrifugal pump has no relief valve?
68.
Arrangements for relieving shocks in the steering gear?
69.
What is bell mouth?
70.
What is interface of purifier?
71.
What are swash plate pumps?
72.
Why is oil coming from the water side of purifier?
73.
Explain the significance of heat treatment in steels?
74.
Hosing down procedure for engine room tank top?
75.
What are the precautions before entering inside an air
reservoir?
General Engineering Knowledge
1.Why certain back pressure is maintained for purifier?
2.What is the use of purifier breaks? 3.Explain the functions of purifier centrifugal clutch? 4.What are ALCAP purifiers? 5.Explain the importance of gravity disc in a purifier? 6.How will you manage your air compressor without automatic unloader? 7.How will you confirm that air compressor valves are not leaking after overhauling? 8.Why oil film is coated on a compressor air filter? 9.
Effect of air filter mesh size in an air compressor?
10.
What is the working principle of an air drier?
11.
Name five non metals used on board ships?
12.
Routine checks on a fixed foam fire fighting system?
13.
How many types of steels and brief their carbon contents?
14.
What is the material of safety valve?
15.
Define flash point, fire point, viscosity?
16.
How many types of propeller?
17.
What will you do if emergency alarm raise?
18.
What is the function of fire detector?
19.
What is saturation temperature?
20.
What is humidity?
21.
What is the material of cooler tubes?
22.
What is specific gravity?
23.
What is vacuum?
24.
What is meant by critical speed?
25.
What do you know about 'M' notices?
26.
What s the function of poker gauge?
27.
What s the function of lubricating oil?
28.
What is hydrostatic lubrication?
29.
What is inerting, purging and gas freeing in inert gas system?
30.
What are fire man's outfit?
31.
What is cetane number and calorific value of a fuel?
32.
How will you buy a boiler?
33.
What is the formula of stress in longitudinal and
circumferential joint? 34.
Describe boiler starting procedure from cold?
35.
Why boiler water treatment is required?
36.
How many types of marine boilers are used on ships?
37.
What are the tests carried out for a low pressure boiler water?
38.
What is your action on finding high chloride levels in a boiler?
39.
What will you do if no water level in the gauge glass?
40.
How would you blow down a boiler gauge glass?
41.
What are boiler mountings?
42.
What will you check while watch on a boiler?
43.
What is allowable chloride content in boiler water?
44.
If the steam nozzle of the gauge glass is chocked then how
will you confirm water level? 45.
Why purge a boiler furnace?
46.
What is superheated steam?
47.
How many types of boiler safety valve?
48.
Describe boiler survey procedure?
49.
How to check alkalinity, acidity, chloride content in boiler?
50.
Draw the lip clearance of safety valve?
51.
What is the difference between safety valve and relief valve?
52.
What is corrosion, erosion, and abrasion?
53.
Comment on materials of boiler construction?
54.
Why and how soot blowing is done?
55.
Describe automatic combustion system in a boiler?
56.
Why flame failure alarm comes and what will be your action?
57.
When do you start the boiler circulating water pump?
58.
How will you know that EGB is leaking and how to arrest the
leak? 59.
How boiler safety valve is set?
60.
Show the calculation of safety valve area?
61.
What do you know about economiser?
62.
Describe setting of safety valve?
63.
What is steam hammering?
64.
What is manometer?
65.
What is steam trap?
66.
How will you prevent uptake fire?
67.
What is dry distillation?
68.
What action o be taken if oil is found in the cascade tank?
69.
What colour flame indicates efficient or poor combustion?
70.
What is Ogee ring?
71.
Where the boiler fusible plugs are used?
72.
What are the densities of boiler water and seawater?
73.
What is the diameter of safety valve?
74.
What is the purpose of blow down ring?
75.
Is there any arrangement for boiler safety valve draining?
Marine Electro Technology
1.What is the use of 'kvar' meter fitted on the MSB? 2.Where auto transformer starter is used on board ships and why? 3.Explain star delta starter? 4.Why starters are not used for land based installations?
5.Any two applications of zener diode on board ships? 6.How will you come to know whether a fuse is blown out or not, explain two methods? 7.What is meant by intrinsically safe? 8.Name any three intrinsically safe equipments on board other than a torch light and lamp? 9.Explain the working principle of an explosimeter and reasons for false readings? 10.
How will you check reverse power and overload relay in the
MSB? 11.
What are the routine maintenance in an alternator?
12.
How will you confirm a solenoid is working or not?
13.
What kind of starter could be used for force draught fan for the
boiler? 14.
How to check the insulation resistance of a DC motor?
15.
How to use a voltmeter for synchronization in the absence of
synchroscope and synchronizing lamps? 16.
How does earth fault detector work?
17.
Explain the conditions of paralleling alternators?
18.
Draw the synchronizing method?
19.
What is he difference between a megger and a multimeter?
20.
Comment on air circuit breakers?
21.
What are the safeties provided on Main Switch Board?
22.
Describe how a self excited generator works?
23.
What is the function of AVR?
24.
How will you find out earth fault in the system?
25.
What is reverse power protection for?
26.
What is Wheatstone bridge?
27.
Draw the synchroscope system?
28.
What do you understand by preferential trip and when they
operate? 29.
Describe AC and DC? Where DC is used on board ships?
30.
What is induction motor?
31.
What are star delta windings?
32.
What is a short circuit?
33.
What is meant by earth fault?
34.
What is meant by overload?
35.
What is single phasing and how it happens?
36.
What is fuse and how many types of fuses have seen before?
37.
Why an air compressor is started unloaded?
38.
What is the difference between ordinary diode and zener
diode? 39.
What is the function of starter and choke in a tube light?
40.
What is the regular maintenance done on batteries?
41.
How does salinometer work?
42.
What will be your action on a blackout a sea?
43.
How does emergency generator starts on its own?
44.
What are the cut out provided on the OWS and checks to be
done before putting it into operation? 45.
Draw star, delta 3 phase connections?
46.
What are the motor safeties, deck crane safeties, and engine
room over head safeties to be checked? 47.
What is relay? How it is different from a magnetic contactor?
48.
What is ohm's law?
49.
What is the expression for resistance in terms of length and
area of conductor? 50.
What is sequential starting?
51.
What is the function of circuit breaker?
52.
What essentials are supplied from emergency switchboard?
53.
How will you confirm a minimum insulation resistance
reading? 54.
Describe steering power supply regulations?
55.
What is Coulomb's law?
56.
Describe Fleming's left and right hand rule?
57.
Describe lenz's law?
58.
What is the difference between electric and magnetic circuit?
59.
Describe and Draw battery charging method?
60.
How many types of DC motors are there?
61.
How many types of AC motors are there?
62.
What is magnetic hysteresis?
63.
What is eddy current and how to minimize it?
64.
How many types of electric circuits are there?
65.
Describe Kirchoff's laws?
66.
How many types of battery used on board ships?
67.
What is the constructional difference between AC and DC
generators? 68.
How to calculate number of poles of a generator?
69.
What are the causes of zero voltage in a running generator?
70.
What is the difference between an induction motor and
synchronous motor? 71.
What is the reading of hydrometer reading in full charge and
discharge? 72.
What is meant by transformer and rectifier?
73.
What is he units for voltage, current, power and resistance?
74.
Comment on the starting current while using a direct online
starter for an induction motor? 75.
What is reluctance?
Fuel Oil Viscosity Controller
The basic principle of the Viscotherm viscosity monitoring device is shown in the figure below. A continuous sample of the fuel is pumped at a constant rate through a fine capillary tube. As the flow through the tube is laminar, pressure drop across the tube is proportional to viscosity.
In this unit an electric motor drives the gear pump through a reduction gear at a speed of 40 rpm. The pump is positioned in the chamber through which fuel is passing from the heater to the fuel pumps or combustion equipment. Tapping points are provided to enable the pressure difference to be measured by means of a differential pressure gauge. The gauge is calibrated directly in terms of viscosity. Parts in contact with the fuel are of stainless steel for corrosive resistance.
A differential pressure transmitter shown below provides an analogue of viscosity to a pneumatic controller, which regulates the supply of fuel heating steam through a control valve.
How to Measure Indicated Power in Diesel Engine with Indicator Diagram The burning of fuel in an engine cylinder (2 stroke or 4 stroke diesel engine) will result in the production of power at an output shaft, some of the power produced in the cylinder will be used to drive the rotating masses of the engine. Typical indicator diagram for a 2 stroke engine is shown in figure below. The area within the diagram represents the work done within the cylinder in one cycle.
Indicator Diagram (PV Diagram) The area can be measured by an instrument known as 'Planimeter ' or by the use of the mid ordinates rule. [On modern engines this diagram can be continuously taken by employing two transducers, one pressure transducer in the combustion space and other transducer on the shaft. Through the computer we can thus get on line indicated diagram and power of all cylinders.] The area is then divided by the length of the diagram in order to obtain mean height. This mean height, when multiplied by the spring scale of the indicator mechanism, gives the indicated mean effective pressures for the
cylinder. The mean effective or average pressure [Pm] can now be used to determine the workdone in the cylinder.
Calculations Area of the indicator diagram = a [mm 2] Average height of the diagram = a [mm 2] / l [mm] Average mean indicator pressure = a [mm 2] / l [mm] x k [bar / mm]
or Pm = ( a / l ) x k [bar] where k = spring scale in bar per mm
Work done in one cycle = Mean Indicated Pressure x Area of the Piston x Length of stroke
= [Pm] x [A] x [L]
To obtain the power of this unit, it is necessary to determine the rate at which work is done, i.e. multiply work by number of power strokes in one second.
Now, Indicated Power of Unit [i p] =
Mean Indicated Pressure [P m] x Area of Piston [A] x Length of Stroke [L] x Number of Power Strokes per Second [N]
or
Indicated Power of Unit = Pm L A N
Unit of Final Result Indicated Power = P m L A N = ( a / l ) x k [bar] x L [m] x A [m2] x N [1/s] = [bar] x [m] x [m 2] x [1/s] = 105 N/m2 x m x m2 x 1/s = 105 Nm/s = 105 Joules/s = 105 Watts
Hence, multiply the result obtained from calculating indicated power with 105 and the final unit will be in Watts.
