41. An auxiliary engine turbocharger makes strange noises when the load changes. The engine parameters however are absolutely fine. An external examination of turbocharger parameters as stated in the manual also reveals nothing. Would you

A. Continue to run the engine and wait for some time

B. Stop the engine for a while and make some checks

C. Reduce the load of the engine

D. Run it on steady load to make some checks.

[bg_collapse view=”button-orange” color=”#49494a” expand_text=”View Answer” collapse_text=”Hide Answer” ]B. Stop the engine for a while and make some checks[/bg_collapse]

42. When preparing to light off a cold boiler equipped with a return flow fuel oil system, the recirculating valve directs the flow of oil

A. directly to the fuel oil heater inlet for further warm-up

B. back to the fuel oil settler for further filtration

C. back to the suction side of the service pump

D. directly to the deep tanks

[bg_collapse view=”button-orange” color=”#49494a” expand_text=”View Answer” collapse_text=”Hide Answer” ]
C. back to the suction side of the service pump[/bg_collapse]

43. External fouling of boiler tubes can lead to:

A. Greater steam generation

B. Tube corrosion

C. Tube Erosion

D. Protection of tube against corrosion

[bg_collapse view=”button-orange” color=”#49494a” expand_text=”View Answer” collapse_text=”Hide Answer” ][/bg_collapse]

44. Types of corrosion in fresh water of D/E

A. Stress

B. hot corrosion

C. bimetallic

D. selective phase corrosion

[bg_collapse view=”button-orange” color=”#49494a” expand_text=”View Answer” collapse_text=”Hide Answer” ]D. selective phase corrosion[/bg_collapse]

45. Which of the following will be required to be done in order to reduce sulphur corrosion of main Engine Components? (Multiple Choice)

A. Increasing the atomization pressure of fuel injectors

B. Fitting exhaust valves with valve rotators

C. Running engine at or near normal sea load

D. Decreasing the F.O. purifier feed rate, running two purifier in series one acting as purifier and other as clarifier

[bg_collapse view=”button-orange” color=”#49494a” expand_text=”View Answer” collapse_text=”Hide Answer” ]A,C,D[/bg_collapse]

46. Most steam traps respond well to cleaning. But when a thermodynamic trap fails to operate after cleaning, the next course of action should be

A. throttle the steam outlet valve

B. renew the trap

C. lap the disc and seat the trap

D. throttle the steam inlet valve

[bg_collapse view=”button-orange” color=”#49494a” expand_text=”View Answer” collapse_text=”Hide Answer” ]C. lap the disc and seat the trap[/bg_collapse]

47. Why does a chain stretch in service?

A. Due to plastic elongation

B. Due to high temperature expansion

C. Due to wear on rollers and bushes

D. Due to the phenomenon of creep

[bg_collapse view=”button-orange” color=”#49494a” expand_text=”View Answer” collapse_text=”Hide Answer” ]C. Due to wear on rollers and bushes[/bg_collapse]

48. Which of the following functions is done by a cam operating an exhaust valve?

A. It governs the timing of opening and closing of the valve.

B. It governs the speed at which the valve operates

C. It governs the amount of opening of the valve

D. All of the above

[bg_collapse view=”button-orange” color=”#49494a” expand_text=”View Answer” collapse_text=”Hide Answer” ]D. All of the above[/bg_collapse]

49. Supercharging an existing medium speed naturally aspirated engine will (Multiple Choice)

A. Reduce weight of the engine.

B. Reduce bulk of the engine.

C. Increase existing power.

D. Increase piston speed.

E. Reduce fuel consumption.

[bg_collapse view=”button-orange” color=”#49494a” expand_text=”View Answer” collapse_text=”Hide Answer” ]C,E[/bg_collapse]

50. Use of Halon as fire extinguishing medium has been discontinued because

A. It is highly toxic

B. It is expensive

C. It has high Ozone depleting potential

D. It leads to acid rains

[bg_collapse view=”button-orange” color=”#49494a” expand_text=”View Answer” collapse_text=”Hide Answer” ]C. It has high Ozone depleting potential[/bg_collapse]

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