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- Question
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
- Correct Answer
- opens at 20° before top dead centre and closes at 40° after bottom dead centre
- 1. 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
- 2. Reflector in nuclear power plants is used to reflect neutrons back into the active core.
Options- A. True
- B. False Discuss
- 3. 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
- 4. A nuclear power plant differs from a conventional steam power station only in the steam generating part.
Options- A. Agree
- B. Disagree Discuss
- 5. 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 Discuss
- 6. Special reactors, called breeder reactors, supply a net gain of fissionable material.
Options- A. True
- B. False Discuss
- 7. Which one of the following engines will have heavier flywheel than the remaining ones?
Options- A. 30 kW four-stroke petrol engine running at 1500 r.p.m.
- B. 30 kW two-stroke petrol engine running at 1500 r.p.m.
- C. 30 kW two-stroke diesel engine running at 750 r.p.m.
- D. 30 kW four-stroke diesel engine running at 750 r.p.m. Discuss
- 8. Materials which make good moderators do not make good reflectors.
Options- A. Correct
- B. Incorrect Discuss
- 9. The cetane number of diesel oil, generally available, is
Options- A. 20 to 25
- B. 25 to 30
- C. 30 to 40
- D. 40 to 55 Discuss
- 10. The octane number of petrol, generally available, is
Options- A. 20 to 40
- B. 40 to 60
- C. 60 to 80
- D. 80 to 100 Discuss
IC Engines and Nuclear Power Plants problems
Search Results
Correct Answer: Yes
Correct Answer: True
Correct Answer: U234 = 0.006%, U235 = 0.712% and U238 = 99.282%
Correct Answer: Agree
Correct Answer: enhanced by decreasing compression ratio
Correct Answer: True
Correct Answer: 30 kW four-stroke petrol engine running at 1500 r.p.m.
Correct Answer: Incorrect
Correct Answer: 40 to 55
Correct Answer: 80 to 100
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