Motor Engineering – MEO CLASS 4 MMD PAPER

SECTION 5

1. Which is true?
   1. Rotary vane steering gear generally operates at high oil pressure than RAM type
   2. RT > RV
   3. RT=RV
   4. None of the above

ANS.: B

2. Besides raising the liner wall temperature to sulphur corrosion
   1. Increase cylinder feed
   2. Increase scavenge air temperature
   3. Improved separation of water
   4. All the above

ANS.: D

3. Functions of attemprator
   1. Increase boiler feed water temperature
   2. Decrease super heated steam out temp and protect secondary stage superheat
   3. Control super heat steam out temp and protect secondary stage superheat
   4. Increase the combustion air temperature

ANS.: C

4. Resin chokes
   1. Better vibration damping
   2. Better compressive strength
   3. Unaffected by fuel oil and sea water chemicals
   4. None of the above.

ANS.: A,C

5. Exhaust grouping in main engine
   1. Better starting
   2. No need for auxiliary blowers
   3. Pure prime

ANS.: A,B

6. No change in speed in governor
   1. Fine
   2. Coarse
   3. Isochronous
   4. Unichronous

ANS.: C

8. Crank case ventilation fan function as
   1. Prevent acc. Of combustion gases
   2. Temp. links oil loading

ANS.: A

9. In a fully built or semi built type crankshaft, how can any slippage at shrink fit be identified?
   1. By inspecting the locking arrangement provided
   2. By checking the dowel provided.
   3. By checking the witness mark provided for reference .
   4. By checking the performance of the engine

ANS.: C

10. The flow rate through a F.O. transfer pump will not be affected by which of the following factors?
    1. Low F.O. temperature
    2. Low sounding in F.O. tank
    3. Internal leakage within the pump
    4. Leaking discharge valve

ANS.: D

11. The use of ball and roller bearings in internal combustion engines is becoming more and more popular for some or all of the following
    1. The low coefficient of friction
    2. The absence of wear under favorable conditions
    3. The independence in lubrication
    4. The extreme reliability of such bearings

ANS.: D

12. 2 stroke exhaust valve rotates by
    1. rotocap
    2. vanes

ANS.: B

13. Sulphur and vanadium in F.O

1. Hot corrosion
2. Cold corrosion
3. Caustic corrosion
4. Acidic corrosion

ANS.: A

14. Cyl liner material
    1. Cast iron
    2. Cast steel
    3. Mild steel
    4. Stainless steel

ANS.: A

15. As per regulations, the velocity capacity of a steering gear system should be such so as to be able to turn the rudder__________
    1. 35 degrees one side to 35 degrees on the other side, in 28 seconds at maximum service speed
    2. 35 degrees one side to 30 degrees on the other side in 28 seconds at maximum service speed
    3. 35 degrees one side to 35 degrees on the other side, in 28 seconds at normal service speed
    4. 35 degrees one side to 30 degrees on the other side, in 28 seconds at normal service speed

ANS.: B

16. Governor paralleling for generators requires
    1. Fine droop/some droop
    2. No droop
    3. Course droop

ANS.: A

17. In diesel generator, increasing the fuel due to drop in load , which will ——————–save machine from damage

1. Limiting load switch
2. Limiting shredded switch
3. Limiting sensor
4. Limiting transmitter

ANS.: A

18. In 2s, getting normal combustion pr. but reduced max pr. due to

1. faulty fuel injection timing
2. exh. valve leaking
3. Piston rings faulty
4. Faulty cam

ANS.: A

19. Efficiency of constant pressure T/C is _______ than pulse type T/C
    1. less
    2. Equal
    3. slightly more
    4. Very high

ANS.: C

21.Thrust block bearings

1. Tilted
2. Flat pad
3. Roller
4. all bearing

ANS.: A

23. Shims are added to the fuel pump

1. retarding injection
2. Advancing injection

ANS.: B

25.Use of economizer

1. to reduce exh. Gas temp. so that NOx will reduce
2. To reduce Sox
3. To increase the efficiency of propulsion unit

ANS.: C

26. When A/E stand by F.O. heater in use of main engine
    1. Sudden opening F.O. inlet valve pressurized and damage the heater
    2. F.O. in vapour lock inside heater allow steam
    3. F.O. inlet valve causes pressure drop M/E F.O. pressure standby water is not pressurized may cause sudden change in engine /per load/rpm
    4. heater leaking.

ANS.: C