Discussion
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- Question
In a four stroke cycle petrol engine, the charge is compressed when both the valves (i.e. inlet valve and exit valve) are closed,
Options- A. Agree
- B. Disagree
- Correct Answer
- Agree
- 1. The reference fuels for knock rating of spark ignition engines would include
Options- A. iso-octane and alpha-methyl naphthalene
- B. normal octane and aniline
- C. iso-octane and normal hexane
- D. normal heptane and iso-octane Discuss
- 2. The detonation is also called knocking or pinking.
Options- A. Yes
- B. No Discuss
- 3. The increase of cooling water temperature in petrol engine will __________ the knocking tendency.
Options- A. not effect
- B. decrease
- C. increase Discuss
- 4. The primary fuel used in nuclear power plants is
Options- A. U235
- B. U238
- C. Pu239
- D. Pu233 Discuss
- 5. The brake power of a diesel engine, keeping other parameters constant, can be increased by
Options- A. decreasing the density of intake air
- B. increasing the temperature of intake air
- C. increasing the pressure of intake air
- D. decreasing the pressure of intake air Discuss
- 6. 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
- 7. 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
- 8. 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
- 9. 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
- 10. The injection pressure in a diesel engine is about
Options- A. 10 bar
- B. 100 bar
- C. 150 bar
- D. 500 bar Discuss
IC Engines and Nuclear Power Plants problems
Search Results
Correct Answer: normal heptane and iso-octane
Correct Answer: Yes
Correct Answer: increase
Correct Answer: U235
Correct Answer: increasing the pressure of intake air
Correct Answer: Yes
Correct Answer: all ofthe above
Correct Answer: high thermal efficiency and power output
Correct Answer: delay period
Correct Answer: 100 bar
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