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- Question
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.
- Correct Answer
- 30 kW four-stroke petrol engine running at 1500 r.p.m.
- 1. Special reactors, called breeder reactors, supply a net gain of fissionable material.
Options- A. True
- B. False Discuss
- 2. 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
- 3. 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
- 4. Reflector in nuclear power plants is used to reflect neutrons back into the active core.
Options- A. True
- B. False Discuss
- 5. 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
- 6. Materials which make good moderators do not make good reflectors.
Options- A. Correct
- B. Incorrect Discuss
- 7. 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
- 8. 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
- 9. The air standard efficiency ofan I.C. engine is given by (where r = Compression ratio, and ? = Ratio of specific heats)
Options- A. 1 - r? - 1
- B. 1 + r? - 1
- C.
- D. none of these Discuss
- 10. In a four stroke cycle diesel engine, the compression
Options- A. starts at 40° after bottom dead centre and ends at 10° before top dead centre
- B. starts at 40° before top dead centre and ends at 40° after top dead centre
- C. starts at top dead centre and ends at 40° before bottom dead centre
- D. may start and end anywhere Discuss
IC Engines and Nuclear Power Plants problems
Search Results
Correct Answer: True
Correct Answer: opens at 20° before top dead centre and closes at 40° after bottom dead centre
Correct Answer: Yes
Correct Answer: True
Correct Answer: U234 = 0.006%, U235 = 0.712% and U238 = 99.282%
Correct Answer: Incorrect
Correct Answer: 40 to 55
Correct Answer: 80 to 100
Correct Answer:
Correct Answer: starts at 40° after bottom dead centre and ends at 10° before top dead centre
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