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 boiler 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 blowing? 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?
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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 boiler 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 ship14. 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 blowing?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 breaks?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 compressors?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 of this?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 treatment39. 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 case 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 diagram68. What are the strokes in 2 stroke and four stroke engines69. Difference between purifier and clarifier70. 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 engines83. Are there engines w/o cylhead?
84. Draw 2s timing diagram85. 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 Governors89. 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 practice HOME1. Explain how will you o'haul a fuel injector
2. Explain how you will change gland packing of a pump.
4. What does different position of the synchroscope needle mean; what is the difference between 6 o clock and 12 clock?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 rises39. 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 ships? 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 alternators?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 batteries?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 out 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 breaker of the main 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, how does the alternator maintain constant frequency?122. Is the alternator connected star or delta123. 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 OF PERSONNEL ONBOARD HOME