Discussion
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- Question
The theoretically correct mixture of air and petrol is
Options- A. 10:1
- B. 15:1
- C. 20:1
- D. 25:1
- Correct Answer
- 15:1
- 1. If V1 is the jet velocity and V0 is the vehicle velocity, then the propulsive efficiency of a rocket is given by
Options- A.
- B.
- C.
- D.
Discuss
- 2. The frictional power (F.P.) is given by
Options- A. F.P. = B.P. - I.P.
- B. F.P. = I.P. - B.P.
- C. F.P. = B.P./I.P.
- D. F.P. = I.P./B.P. Discuss
- 3. The ratio of the brake power to the indicated power is called
Options- A. mechanical efficiency
- B. overall efficiency
- C. indicated thermal efficiency
- D. volumetric efficiency Discuss
- 4. A supercharged engine as compared to an ordinary engine
Options- A. requires smaller foundation
- B. is lighter
- C. consumes less lubricating oil
- D. all of these Discuss
- 5. For the same maximum pressure and heat input, the exhaust temperature of petrol engine is __________ than that of diesel engine.
Options- A. less
- B. more Discuss
- 6. The colour of exhaust from diesel engine is generally
Options- A. white
- B. bluish
- C. black
- D. violent Discuss
- 7. The advancing of spark timing in spark ignition engines will __________ knocking tendency.
Options- A. increase
- B. reduce
- C. not effect Discuss
- 8. Uranium has isotopes
Options- A. U234
- B. U235
- C. U238
- D. all of these Discuss
- 9. The maximum propulsive efficiency of a turbo-jet engine is at a speed of
Options- A. 1000 km/h
- B. 2000 km/h
- C. 2400 km/h
- D. 3000 km/h Discuss
- 10. In a four stroke cycle diesel engine, the exhaust valve
Options- A. opens at 30° before bottom dead cnetre and closes at 10° after top dead centre
- B. opens at 30° after bottom dead centre and closes at 10° before top dead centre
- C. opens at bottom dead centre and closes at top dead centre
- D. may open and close anywhere Discuss
IC Engines and Nuclear Power Plants problems
Search Results
Correct Answer:
Correct Answer: F.P. = I.P. - B.P.
Correct Answer: mechanical efficiency
Correct Answer: all of these
Correct Answer: more
Correct Answer: black
Correct Answer: increase
Correct Answer: all of these
Correct Answer: 2400 km/h
Correct Answer: opens at 30° before bottom dead cnetre and closes at 10° after top dead centre
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