Discussion
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- Question
The knocking tendency in compression ignition engines for a given fuel will be
Options- A. enhanced by decreasing compression ratio
- B. enhanced by increasing compression ratio
- C. dependent on other factors
- D. none of the above
- Correct Answer
- enhanced by decreasing compression ratio
- 1. The cylinder of a gas engine is made __________ than that of the petrol engine.
Options- A. smaller
- B. larger Discuss
- 2. In a petrol engine, the fuel supplied to the engine cylinder is mixed with required quantity of air and the mixture is ignited with a
Options- A. fuel pump
- B. fuel injector
- C. spark plug
- D. none of these Discuss
- 3. A fuel of an octane number rating of 75 matches in knocking intensity as a mixture of
Options- A. 75% iso-octane and 25% normal heptane
- B. 75% normal heptane and 25% iso-octane
- C. 75% petrol and 25% diesel
- D. 75% diesel and 25% petrol Discuss
- 4. The specific fuel consumption per B.P. hour for a diesel engine is about
Options- A. 0.2 kg
- B. 0.25 kg
- C. 0.3 kg
- D. 0.35 kg Discuss
- 5. A supercharger receives air from the atmosphere surrounding the engine, compresses it to a higher pressure and then feeds it into the inlet valve of the engine.
Options- A. Correct
- B. Incorrect Discuss
- 6. A nuclear power plant differs from a conventional steam power station only in the steam generating part.
Options- A. Agree
- B. Disagree Discuss
- 7. In natural uranium, the constituents of three naturally occuring isotopes are
Options- A. U234 = 0.006%, U235 = 0.712% and U238 = 99.282%
- B. U234 = 0.712%, U235 = 0.006% and U238 = 99.282%
- C. U234 = 99.282%, U235 = 0.006% and U238 = 0.712%
- D. U234 = 0.006%, U235 = 99.282% and U238 = 0.712% Discuss
- 8. Reflector in nuclear power plants is used to reflect neutrons back into the active core.
Options- A. True
- B. False Discuss
- 9. In petrol engines, using a fixed octane rating fuel, the increase in engine speed will decrease the knocking tendency.
Options- A. Yes
- B. No Discuss
- 10. In a four stroke cycle diesel engine, the inlet valve
Options- A. opens at 20° before top dead centre and closes at 40° after bottom dead centre
- B. opens at 20° after top dead centre and closes at 20° before bottom dead centre
- C. opens at top dead centre and closes at bottom dead centre
- D. may open and close anywhere Discuss
IC Engines and Nuclear Power Plants problems
Search Results
Correct Answer: larger
Correct Answer: spark plug
Correct Answer: 75% iso-octane and 25% normal heptane
Correct Answer: 0.2 kg
Correct Answer: Correct
Correct Answer: Agree
Correct Answer: U234 = 0.006%, U235 = 0.712% and U238 = 99.282%
Correct Answer: True
Correct Answer: Yes
Correct Answer: opens at 20° before top dead centre and closes at 40° after bottom dead centre
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