11. 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.


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

12. The muffling of exhaust gas noise in 4 stroke auxiliary engines in achieved by (Multiple Choice)

A. Allowing the gas to expand.

B. Change the direction of their flow.

C. Cool the gas with injected water.

D. Cool the gas with scavenge air.

A,B

13. Which of the following factors governs the lower limit of thrust bearing clearance?

A. To allow some oil leakage to prevent overheating

B. Reduction of oil viscosity

C. Alignment of crankshaft

D. To allow the thrust pads to tilt and generate the oil wedge

D. To allow the thrust pads to tilt and generate the oil wedge

14. When m/e is running in emergency condition which of the alarms can’t be bypassed

A. LO low pressure

B. Jacket water high temp

C. Piston cooling water high temp

D. All the above


D. All the above

15. Which of the following types of damages are metal seatings of a valve subject to?

Choose the correct alternative.

A. Corrosion, Erosion, Abrasion, Deformation

B. Corrosion, Fatigue failure, brittle fracture, caustic cracking

C. Erosion, caustic cracking, brittle fracture, Clover leafing

D. None of the above

A. Corrosion, Erosion, Abrasion, Deformation

16. Which of the following statements is true?

A. The rotary vane type steering gear generally operates at higher oil pressures than the ram type.

B. The ram type steering gear generally operates at higher oil pressures than the rotary vane type.

C. Both ram type and rotary vane type steering gears generally operate at similar oil pressures

D. None of the above

B. The ram type steering gear generally operates at higher oil pressures than the rotary vane type

17. Which of the following types of damages are metal seatings of a valve subject to?

Choose the correct alternative.

A. Corrosion, Erosion, Abrasion, Deformation

B. Corrosion, Fatigue failure, brittle fracture, caustic cracking

C. Erosion, caustic cracking, brittle fracture, Clover leafing

D. None of the above

A. Corrosion, Erosion, Abrasion, Deformation

18. Even if there is an oil mist concentration inside a crankcase, and there is also a hot spot, crankcase explosion will only take place when?

A. The hot spot provides the ignition temperature for the oil mist concentration

B. When the oil mist – air mixture is in the flammable range

C. Both A and B

D. None of the above


C. Both A and B

19. 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.

C,E

20. Which of the following layers of a thin shell bearing gives it its fatigue strength?

A. The overlay

B. The interlay

C. The backing

D. The barrier layer

A. The overlay

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