Discussion
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- Question
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
- Correct Answer
- Agree
- 1. The thermal efficiency of diesel engines on weak mixtures is
Options- A. unaffected
- B. lower
- C. higher
- D. dependent on other factors Discuss
- 2. Reactors for propulsion applications are designed for
Options- A. any form of uranium
- B. natura uranium
- C. enriched uranium
- D. plutonium Discuss
- 3. The detonating tendency in petrol engines increases with increase of compression ratio.
Options- A. True
- B. False Discuss
- 4. 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
- 5. The injection pressure in a diesel engine is about
Options- A. 10 bar
- B. 100 bar
- C. 150 bar
- D. 500 bar Discuss
- 6. Only rocket engines can be propelled to space because
Options- A. they can generate very high thrust
- B. they have high propulsion efficiency
- C. these engines can work on several fuels
- D. they are not air-breathing engines Discuss
- 7. The increase in pressure in a roots blower is entirely due to back flow of air.
Options- A. Agree
- B. Disagree Discuss
- 8. A rocket works with maximum overall efficiency when air-craft velocity is __________ the jet velocity.
Options- A. equal to
- B. one-half
- C. double Discuss
- 9. The degree of reaction in an axial flow compressor is defined as the ratio of static enthalpy rise in the
Options- A. rotor to static enthalpy rise in the stator
- B. stator to static enthalpy rise in the rotor
- C. rotor to static enthalpy rise in the stage
- D. stator to static enthalpy rise in the stage Discuss
- 10. The compression ratio in a gas turbine is
Options- A. 4
- B. 1
- C. 9
- D. 12 Discuss
IC Engines and Nuclear Power Plants problems
Search Results
Correct Answer: higher
Correct Answer: enriched uranium
Correct Answer: True
Correct Answer: U233 and Pu239
Correct Answer: 100 bar
Correct Answer: they are not air-breathing engines
Correct Answer: Agree
Correct Answer: one-half
Correct Answer: rotor to static enthalpy rise in the stage
Correct Answer: 1
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