Discussion
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- Question
In petrol engine, using a fixed octane rating fuel and fixed compression ratio, supercharging will __________ the knocking tendency.
Options- A. not effect
- B. decrease
- C. increase
- Correct Answer
- increase
- 1. A moderator, in nuclear power plants, is a medium introduced into the fuel mass in order to
Options- A. slow down the speed of fast moving neutrons
- B. control the reaction
- C. reduce the temperature
- D. extract heat from nuclear reaction Discuss
- 2. The pre-ignition occurs before the spark is produced whereas detonation develops after the introduction of spark.
Options- A. Agree
- B. Disagree Discuss
- 3. The effective inhibitor of pre-ignition is
Options- A. alcohol
- B. water
- C. lead
- D. none of these Discuss
- 4. The expansion of fuel in a four stroke cycle diesel engine
Options- A. starts at 15° before top dead centre and ends at 30° after top dead centre
- B. starts at top dead centre and ends at 30° after top dead centre
- C. starts at 15° after top dead centre and ends at 30° before bottom dead centre
- D. may start and end anywhere Discuss
- 5. The exhaust valve in a four stroke cycle petrol engine
Options- A. opens at 50° before bottom dead centre and closes at 15° after top dead centre
- B. opens at bottom dead centre and closes at top dead centre
- C. opens at 50° after bottom dead centre and closes at 15° before top dead centre
- D. may open and close anywhere Discuss
- 6. In hit and miss governing, the fuel supply is cut-off completely during one or more number of cycles.
Options- A. Yes
- B. No Discuss
- 7. The ratio of the volume of charge admitted at N.T.P. to the swept volume of the piston is called
Options- A. mechanical efficiency
- B. overall efficiency
- C. volumetric efficiency
- D. relative efficiency Discuss
- 8. The pressure at the end of compression, in diesel engines, is approximately
Options- A. 10 bar
- B. 20 bar
- C. 25 bar
- D. 35 bar Discuss
- 9. The energy released during the fission of one atom of Uranium - 235 in million electron volts is about
Options- A. 100
- B. 200
- C. 300
- D. 400 Discuss
- 10. In a four stroke cycle petrol engine, the charge is ignited at
Options- A. 30° before top dead centre
- B. 30° after top dead centre
- C. 30° before bottom dead centre
- D. 30° after bottom dead centre Discuss
IC Engines and Nuclear Power Plants problems
Search Results
Correct Answer: slow down the speed of fast moving neutrons
Correct Answer: Agree
Correct Answer: water
Correct Answer: starts at 15° after top dead centre and ends at 30° before bottom dead centre
Correct Answer: opens at 50° before bottom dead centre and closes at 15° after top dead centre
Correct Answer: Yes
Correct Answer: volumetric efficiency
Correct Answer: 35 bar
Correct Answer: 200
Correct Answer: 30° before top dead centre
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