IC Engines and Nuclear Power Plants problems
- 1. Ordinary water is sometimes used as moderator when enriched uranium is used as a fuel in nuclear power plants.
Options- A. Yes
- B. No Discuss
Correct Answer: Yes
- 2. The object of supercharging the engine is
Options- A. to reduce mass ofthe engine per brake power
- B. to reduce space occupied by the engine
- C. to increase the power output of an engine when greater power is required
- D. all ofthe above Discuss
Correct Answer: all ofthe above
- 3. The basic requirement of a good combustion chamber is
Options- A. minimum turbulence
- B. low compression ratio
- C. high thermal efficiency and power output
- D. low volumetric efficiency Discuss
Correct Answer: high thermal efficiency and power output
- 4. In a diesel engine, the duration between the time of injection and ignition, is known as
Options- A. pre-ignition period
- B. delay period
- C. period of ignition
- D. burning period Discuss
Correct Answer: delay period
- 5. The injection pressure in a diesel engine is about
Options- A. 10 bar
- B. 100 bar
- C. 150 bar
- D. 500 bar Discuss
Correct Answer: 100 bar
- 6. The secondary fuel used in nuclear power plants is
Options- A. U233 and Pu239
- B. U235 and Th232
- C. U235 and Pu238
- D. U233 and Pu238 Discuss
Correct Answer: U233 and Pu239
- 7. The detonating tendency in petrol engines increases with increase of compression ratio.
Options- A. True
- B. False Discuss
Correct Answer: True
- 8. Reactors for propulsion applications are designed for
Options- A. any form of uranium
- B. natura uranium
- C. enriched uranium
- D. plutonium Discuss
Correct Answer: enriched uranium
- 9. The thermal efficiency of diesel engines on weak mixtures is
Options- A. unaffected
- B. lower
- C. higher
- D. dependent on other factors Discuss
Correct Answer: higher
- 10. In diesel engines, the fuel is injected in the form of very fine spray, into the engine cylinder, which gets ignited due to high temperature of the compressed air.
Options- A. Agree
- B. Disagree Discuss
Correct Answer: Agree
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