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MEO Class 4 Oral Questions

MEO Class 4 Oral Questions 

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?

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?

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