GENERAL ENGINEERING KNOWLEDGE – MEO CLASS 4 MMD PAPER

41. When oil carried over in steam drum
    1. overheating of tubes,
    2. corrosion of tubes
    3. density of water is reduced
    4. all of the above

ANS.: D

42. Steam drum is used for
    1. collecting of steam
    2. collecting of water
    3. equalising water in the tubes
    4. collecting of precipitated salts of water

ANS.: A

43. Steam drains should be
    1. drained by gravity
    2. short lateral length
    3. should cover less head space
    4. all of the above

ANS.: A

44. Which of the group of method are used for priming of centrifugal pumps onboard ships?
    1. Gravity tank, attached vacuum pump
    2. Attached Vacuum pump, filling pump casing using a fresh water hose
    3. Central priming system, attached vacuum pump, sea water priming
    4. None of the above

ANS.: C

45. The crank web deflection readings of a diesel engine would be erroneous in which of the following conditions?
    1. When the draught of the vessel has changed while readings were being taken
    2. When cargo loading and discharging has been too rapid
    3. When the crankcase temperature has changed substantially during the process of taking the readings.
    4. None of the above

ANS.: A,B,C

46. Which of the following will be required to be done in order to reduce sulphur corrosion of Main Engine Components?
    1. Increasing the atomization pressure of fuel injectors
    2. Fitting exhaust valves with valve rotators
    3. Running engine at or near normal sea load
    4. Decreasing the F.O. purifier feed rate, running two purifier in series one acting as purifier and other as clarifier

ANS.: A,C,D

47. Vacuum priming pumps which work on the principle of fixed vane pumps require ______  for ________  clearance between vane tips and casing.
    1. Lube oil, lubricating
    2. Lube oil, sealing
    3. Water, sealing
    4. Gland packing, sealing

ANS.: C

48. The common term used for failure of metal and alloys in a corrosive environment , when subject to high stresses is known as :
    1. Fatigue failure
    2. Corrosion fatigue
    3. Stress corrosion cracking
    4. Fretting Corrosion

ANS.: C

49. About emergency fire pump…?
    1. out of engine room
    2. self priming
    3. power should be outside e/r
    4. all the above

ANS.: D

50. Double entry impellers have a distinct advantage over single entry impeller. What is it?
    1. They balance out the axial thrust
    2. It gives a higher pumping efficiency
    3. It is cheaper and easier to manufacture
    4. The need of installing line bearing onto the pump shaft is eliminated

ANS.: 1,2

51. A refrigerant compressor will run continuously when there is
    1. Too heavy cooling load on the system
    2. Air in the system
    3. Insufficient refrigerant in the system
    4. Any of the above

ANS.: A

52. Cause why cascade tank water temperature is high? OR What could be the reason why the feed pump can hardly pump in water to the auxiliary boiler causing the cascade tank water level to rise & temperature too high?
    1. High ambient temperature
    2. Clogged condenser water tubes
    3. Filter dirty
    4. Low cascade water level

ANS.: B

53. Where is the location of the backfire valve?
    1. Boiler furnace
    2. Scavenging area
    3. Gas cylinder

ANS.: C

54. During departure from a 2 weeks anchorage, the reason why the windlass cannot lift the anchor up is
    1. Low lube oil tank level
    2. Windlass defective by pass valve
    3. Anchor drag sunken object
    4. Too cold hydraulic oil

ANS.: C

55. A ballast pump is being used to deballast a fore peak tank which is full. It is seen that suction pressure is positive and discharge pressure is very low compared to rated discharge head. It indicates that:
    1. Pump is not operating satisfactorily and pumping capacity is too low 
    2. Pump is not operating satisfactorily and pumping capacity is higher than rated, throttling of discharge valve is required 
    3. Pumping capacity is not affected by suction and discharge pressures 
    4. Pump is operating normally

ANS.: B

56. What attachment can you find in air reservoir?
    1. Safety/Relief valve
    2. Fusible plug
    3. Bursting disc

ANS.: A,B

57. Cavitation erosion occurs due to
    1. Chemical action
    2. Physical action
    3. Chemical OR physical action
    4. Combination of chemical or physical action

ANS.: B

58. The lowest temperature at which a liquid as listed on the MSDS, gives off enough vapor to ignite in the presence of an ignition source is called its _______.
    1. Flash point
    2. Fire point
    3. Ignition point
    4. None

ANS.: A

59. Boiler secondary drum pressure …………than primary drum pressure
    1. Less
    2. More
    3. Equal

ANS.:  B

61. When main engine is running in emergency condition which of the alarm can’t be bypassed.
    1. LO low pressure
    2. JCW high temp
    3. Piston cooling water high temp
    4. All

ANS.: D

62.Why we do not prefer to run air two compressor together because

1. All below points
2. Too much maintenance
3. Too much power consumption
4. Loss of lube oil

ANS.: A