PURIFIER
| 1. | Explain the basic principle of purifier and clarifier. |
| 2. | What is the need of purification? |
| 3. | What is gravity disc? |
| 4. | How to choose correct size of gravity disc? |
| 5. | What is the function of paring disc? |
| 6. | What is the difference between purifier and clarifier? |
| 7. | How do you change purifier to clarifier? |
| 8. | What are the causes of excessive vibration on purifier? |
| 9. | What are the possible reasons of purifier overflowing? |
| 10. | How to adjust bowl height? |
| 11. | Why multi disc are provided? |
| 12. | Why we need water sealing in purifier? |
| 13. | How does the bowl closes by bowl closing water although it is too heavy? |
| 14. | How to manually start the purifier and checks done before starting and stopping of the purifier? |
| 15. | Explain the principle of working of ALCAP? |
| 16. | What is the reason of providing the clutch in purifier and why it is not directly coupled? |
| 17. | If the electrical officer interchanges the motor connection of purifier, what will happen? |
| 18. | What is wobbling and how to check it in purifier and where? |
| 19. | What things will you check in purifier gear case inspection? |
| 20. | Why friction pad is used in purifier? |
| 21. | How will you measure vertical shaft height? |
| 22. | Draw purifier clutch working with diagram. |
| 23. | What is the use of friction pad in purifier? |
| 24. | Why purifier vertical shaft arrangement has two bearings at bottom? |
| 25. | What is the effect of reduced purifier bowl height? |
| 26. | Why we don’t use gravity disc in clarifier? |
| 27. | Where we find spring in purifier? |
REFRIGERATION & AIR CONDITION
| 1. | Explain the general vapour compression cycle for refrigeration system. |
| 2. | What are the desired properties of a refrigerant ? What is oil differential pressure cutout? |
| 3. | What are the safeties in refrigeration system? |
| 4. | What are the different methods of charging refrigerant in the system? |
| 5. | What is critical temperature? |
| 6. | What is primary refrigerant? |
| 7. | What is secondary refrigerant? |
| 8. | What is the principle of refrigeration? Name some refrigerants used onboard. |
| 9. | What is solenoid valve? Its function? Why it is fitted? |
| 10. | What is the function of thermostatic expansion valve? What maintenance are to be done on TEV? |
| 11. | What do you understand by the term internal equalizing and external equalizing? |
| 12. | What are tests to detect leakage of refrigerant in the system? |
| 13. | What is refrigeration and air conditioning? |
| 14. | What is the purpose of ventilation of cargo hold? |
| 15. | What is short cycling of refrigeration compressor? |
| 16. | Why superheat is required at evaporator outlet? |
| 17. | What could be the reason of HP cut out in the refrigeration system? |
| 18. | What are the causes of:
|
| 19. | How will you get to know out air in the system and how to remove it? |
| 20. | What is the function of backpressure valve in refrigeration system and why it is fitted inside vegetable room only? |
| 21. | How unloader works in refrigeration system? |
| 22. | Why compound gauge fitted in refrigeration system? |
| 23. | Icing on evaporator coil. What are the possible reasons? |
| 24. | Why refer compressor is generally belt driven? |
| 25. | How will you come to know if there is air in the refer system. And how to remove it? |
| 26. | How to check if refer belts are slack or tight? |
| 27. | How will you check performance of unloader? |
| 28. | If unloader valve of your air compressor not working, what action shall you take? |
| 29. | Why crankcase relief door not fitted in refrigeration compressor crankcase? |
| 30. | Why a heater is provided in refer compressor crankcase? |
FRESH WATER GENERATOR
| 1. | What are different types of fresh water generator and explain the working of fresh water generator that you have onboard? |
| 2. | What could be the reason for loss of vacuum in FWG? |
| 3. | Why scale formation is not the major concern in FWG as compared to boiler? |
| 4. | What could be the reason of high salinity in FWG? |
| 5. | Explain the procedure of starting the FWG? |
| 6. | Explain the procedure of stopping the FWG. |
| 7. | How to regulate the capacity of FWG? |
| 8. | How scale formation takes place in FWG and how to minimize it? |
| 9. | At what sea water temperature, water production will be more? 10 degrees or 25 degrees. Explain. |
| 10. | Fresh water discharge capacity decreases. Reasons? |
| 11. | Fresh water salinity alarm comes. What may be the reasons? |
| 12. | How do you test a FWG plant for leak? |
MISC.
| 1. | How steam trap works? |
| 2. | Draw the diagram of hydraulic jack and how it works? |
| 3. | What surface preparation you shall do before welding? |
| 4. | What are non destructive tests? Explain them. |
| 5. | Draw the diagram of retainer ring or circlip. |
| 6. | What are different types of welding process? |
| 7. | Name and explain some welding defects. |
| 8. | What precautions should be taken during welding? |
| 9. | How accommodation is welded to hull? Name the type of welding. |
| 10. | What is heat treatment? What are different heat treatment methods? |
| 11. | What is annealing and brazing? |
| 12. | How to order a bolt? |
| 13. | What are types of washer? |
| 14. | What checks are carried out in spring? |
| 15. | How to detect surface cracks? |
| 16. | How to prevent crack from propagating? |
| 17. | Explain different types of threads. |
| 18. | Explain stud ordering procedure. |
| 19. | How to check the strength of bolt? |
| 20. | What are the safeties on Auxiliary Engine? |
| 21. | Why vacuum condenser and atmospheric condenser is needed? |
| 22. | Define enthalpy and entropy. |
| 23. | What are the reasons for dry docking? |
| 24. | What inspections we make during dry docking? |
| 25. | What is rudder drop? How to check rudder drop and what instrument do we use to check it? |
| 26. | What is propeller drop? How to check propeller drop and what instrument do we use to check it? |
| 27. | What is poker gauge, trammel gauge and bridge gauge? |
| 28. | What is ICCP? Which is anode and cathode in it? What is the difference between sacrificial anode cathodic protection method and ICCP? |
| 29. | What is fitted bolt? |
| 30. | What are different types of washers? |
| 31. | How will you measure whether piston burnt out or not? |
| 32. | Draw and explain profile gauge. |
| 33. | Your sea water pipe near main cooler has to be replaced. How shall you order the pipe? |
| 34. | What is cascade tank and what inspections you will carry out in it? |
| 35. | What are destructive tests? Explain. |
| 36. | How shall you detect leak in AE L.O cooler? |
| 37. | What is dowel pin and its uses? |
| 38. | What are different arrangements for emergency generator starting? |
| 39. | How shall you test JCW for its suitability or further use? |
| 40. | What is the procedure of bunker line pressure testing? |
| 41. | Explain the procedure of AE decarb? |
| 42. | Name the parts of lathe machine. What jobs can be performed on lathe machine? |
| 43. | What are advantages and disadvantages of 3 jaw chuck and 4 jaw chuck? |
| 44. | What are different types of thread and its application? |
| 45. | What are steering gear room safeties? |
| 46. | What are the reasons for error between the helm order & angle shown locally on steering gear unit? |
| 47. | What are emergencies in steering gear system? |
| 48. | What is sluggish movement of rudder? |
| 49. | What is hunting of rudder? |
| 50. | What is the function of buffer spring? |
| 51. | Explain hunting gear mechanism. |
| 52. | What are the safeties in steering gear system? |
| 53. | What is steering gear regulation as per SOLAS? |
| 54. | What is safematic system in steering gear? |
| 55. | What is follow up and non follow up system? |
| 56. | What are the causes of air entering into steering gear hydraulic system? How to remove air from system? |
| 57. | Explain radial piston or hele saw pump. |
| 58. | Explain the working of axial piston pump or swash plate pump. |
| 59. | What are the safeties on windlass? |
| 60. | What are steering motor safeties? |
| 61. | What is shaft earthing device? |
| 62. | Explain different types of taps with drawing. |
| 63. | What is hot working and cold working? |
| 64. | What are the safeties on milling machine? |
| 65. | How shall you take over a watch? |
| 66. | How shall you prepare main engine for departure from port? |
| 67. | What is meant by M18 bolt? |
| 68. | Draw the diagram of mechanical seal? |
| 69. | What is emergency bilge suction? How to test its working? |
| 70. | What are safeties on engine room crane? |
| 71. | What maintenance we should carry out on engine room crane? |
| 72. | How to detect leak in shell and tube type heat exchanger? |
| 73. | How to perform survey of plate type cooler? |
| 74. | Explain different types of corrosion. |
| 75. | What is MGPS system? |
| 76. | What expansion arrangement is given in shell and tube type heat exchanger for the expansion of tubes. |
| 77. | What are oxygen scavengers? |
| 78. | What is steam jetting? |
| 79. | What checks we carry out on chain block? |
| 80. | What is ERMATO JOINT? |
| 81. | How to stop aux engine if not stopping by stop handle? |
| 82. | What is go gauge? |
| 83. | Why emergency bilge suction is bell mouthed? |
| 84. | What are safeties on tanker? |
| 85. | Hydrophore cut in and cut out frequently? What may be the reasons? |
| 86. | How to calibrate inside micrometer? |
| 87. | How to order grinding wheel? |
| 88. | What are the safeties on oxy acetylene cylinder? |
| 89. | While using how we keep acetylene bottle? |
| 90. | Which type of sewage treatment plant is used onboard on your ship? How vacuum is created? What may be the reasons for vacuum not creating? |
| 91. | Explain oily water separator (OWS) working in full detail. What all mountings are there on it and why placed in OWS? |
| 92. | Which tap you will use in 10 mm plate? |
| 93. | What does M8 bolt mean? |
| 94. | What are different types of fit ? Explain with example types of fit used in engine room. |
| 95. | How to pressure test a heat exchanger? |
| 96. | How to calculate vernier scale least count? |
| 97. | How to advance fuel pump timing of a particular unit? |
| 98. | How to put threads on wooden plate? |
| 99. | Sea water pipe line onboard your ship developed hole. How to rectify? State permanent and temporary solutions. |
| 100. | How will you fabricate new pipe having S-shape in workshop and welding procedure on the same pipe. |
| 101. | What is the function of pintle bearing? |
| 102. | How vibration is produced in engine? What is first order and second order moment? |
| 103. | When we use static balancing and dynamic balancing? |
| 104. | Explain plate type heat exchanger overhaul procedure. |
| 105. | What shock absorbing provision is present in rotary vane steering gear? |
| 106. | What maintenance you do on AE 1000 hrs routine? |
| 107. | Draw phase change curve for heat treatment process. |
| 108. | What is the difference between hypo and hyper eutectic steel? |
| 109. | What affect does change in carbon% bring in the nature of a compound? |
| 110. | How to find leak in heat exchanger? |
| 111. | What is bolt extractor? How it works? |
| 112. | Name all lathe parts and their function. |
| 113. | Type of steam trap in cargo heating line? |
| 114. | What is Fitting bolts and where to use? |
| 115. | What maintenance we carry out on scrubber tower? |
PUMP
| 1. | What are different types of pump and their uses? |
| 2. | What is NPSH? |
| 3. | Draw the diagram of internal and external gear pump. |
| 4. | What is the principle on which centrifugal pump works? |
| 5. | What is the function of wear ring and casing ring? |
| 6. | Explain the working of centrifugal pump with graph. |
| 7. | What check we need to perform before starting centrifugal pump? |
| 8. | Centrifugal pump trips on overload. Reasons? |
| 9. | Why centrifugal pump is called roto dynamic pump? |
| 10. | Draw the characteristic curve of centrifugal pump for series and parallel operation. |
| 11. | Why reciprocating pump is called positive displacement pump? |
| 12. | What do you understand by the term cavitation & briefly tell causes of cavitation. |
| 13. | Explain centrifugal pump starting procedure. |
| 14. | Why centrifugal pump can’t handle air? |
| 15. | What is squat phenomenon? |
| 16. | How wear ring is fitted on impeller? |
| 17. | Why centrifugal pump is not self priming? |
| 18. | What are the causes of centrifugal pump reduced output. |
| 19. | What are the reasons for vibration in centrifugal pump? |
| 20. | What is the purpose of inducer? |
| 21. | What is the purpose of mechanical seal? |
| 22. | How to check clearance between wear ring and casing ring? |
| 23. | What is the purpose of lantern ring? |
| 24. | How to cut the gland packing? |
| 25. | What are the disadvantages of gland packing? |
| 26. | Pump is not taking suction. How to know? |
| 27. | What is the function of water ring ? |
| 28. | What are cargo pump room safeties? |
| 29. | Complete procedure of overhauling of centrifugal pump? |
| 30. | How to check different alignment in centrifugal pump? |
| 31. | Which pump is used as bilge pump and why? |
| 32. | What is single acting and double acting reciprocating pump? |
| 33. | What is role of air vessel at the outlet of reciprocating pump? |
| 34. | Pump is not able to take suction from aft bilge well. Reasons? |
| 35. | Explain the basic principle of gear pump and importance of backlash. |
| 36. | Explain the basic principle of screw pump and importance of timing gear in it. |
| 37. | Explain axial displacement pump. |
| 38. | Explain hele shaw pump. |
| 39. | Explain the procedure of gear pump overhaul and checks made after overhaul. |
| 40. | Why we are using double volute casing now a days? |
| 41. | How to fit wear ring on impeller and casing? |
VALVE
| 1. | Explain the procedure of gate valve overhauling. |
| 2. | What is the procedure of bilge well valve and SDNR overhaul? |
| 3. | Explain the procedure of globe valve overhauling. |
| 4. | If seat of valve have big groove what will you do? |
| 5. | What is the difference between SDR valve and SDNR valve? |
| 6. | How lapping of sea water valve and compressor valve? How tocheck correct lapping? |
| 7. | How will you check that valves are leaking? |
TROUBLESHOOTING
| 1. | Reasons of smoky exhaust? |
| 2. | ME one unit exhaust temperature rise. Reasons? |
| 3. | Engine speed drop. Reasons? |
| 4. | ME one unit exhaust temp drops. Reasons? |
| 5. | Charge air pressure drops. Reasons? |
| 6. | Jacket water pressure fluctuates. Reasons? |
| 7. | Jacket water temp increases. Reasons? |
| 8. | Engine fails to start on fuel. Reasons? |
| 9. | Running gear hot. Reasons? |
| 10. | Engine turns on air, but not on fuel. Reasons? |
| 11. | Engine doesn’t fire. Reasons? |
| 12. | Piston running hot. Indications and action? |
| 13. | Cracked cylinder head. Causes and indications? |
| 14. | Individual piston knocking at TDC. Causes? |
| 15. | Bearing temperature increases. Reasons? |
| 16. | You give the kick but engine fails to come on air. What might be the reasons? |
| 17. | Lub oil temperature is abnormally high. What will be your action? |
| 18. | What will be your action when lub oil level is increased in sump? |
| 19. | What will be your action when lub oil level is decreased in sump? |
| 20. | ME all units exhaust temperatures are going high. What may be the reasons? |
| 21. | Refrigeration compressor is short cycling frequently. List the possible reasons. |
| 22. | Scavenge air temp of one unit goes high. What may be the reasons? |
| 23. | AE cooler fouled? What are the possible reasons? |
| 24. | Generator surges at low load. Reasons? |
| 25. | What action you take in case stern tube starts leaking? |
| 26. | What are the reasons of black smoke from diesel engine? |
| 27. | What are the reasons for error between helm order and angle shown locally on the steering gear unit? |
