Discussion
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- Question
The thermal efficiency of diesel engines on weak mixtures is
Options- A. unaffected
- B. lower
- C. higher
- D. dependent on other factors
- Correct Answer
- higher
- 1. Reactors for propulsion applications are designed for
Options- A. any form of uranium
- B. natura uranium
- C. enriched uranium
- D. plutonium Discuss
- 2. The detonating tendency in petrol engines increases with increase of compression ratio.
Options- A. True
- B. False Discuss
- 3. 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
- 4. The injection pressure in a diesel engine is about
Options- A. 10 bar
- B. 100 bar
- C. 150 bar
- D. 500 bar Discuss
- 5. 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
- 6. 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
- 7. 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
- 8. The increase in pressure in a roots blower is entirely due to back flow of air.
Options- A. Agree
- B. Disagree Discuss
- 9. 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
- 10. 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
IC Engines and Nuclear Power Plants problems
Search Results
Correct Answer: enriched uranium
Correct Answer: True
Correct Answer: U233 and Pu239
Correct Answer: 100 bar
Correct Answer: delay period
Correct Answer: Agree
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
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