Mechanical Engineering - IC Engines and Nuclear Power Plants

21. 

The detonating tendency in petrol engines increases with increase of compression ratio.

A. True
B. False

Answer: Option A

Explanation:

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22. 

Each fission of U235 produces on the average __________ fast neutrons as a product of reaction.

A. 2.46
B. 24.6
C. 246
D. 2460

Answer: Option A

Explanation:

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23. 

Reactors for propulsion applications are designed for

A. any form of uranium
B. natura uranium
C. enriched uranium
D. plutonium

Answer: Option C

Explanation:

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24. 

The primary fuel used in nuclear power plants is

A. U235
B. U238
C. Pu239
D. Pu233

Answer: Option A

Explanation:

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25. 

In petrol engine, using a fixed octane rating fuel and fixed compression ratio, supercharging will __________ the knocking tendency.

A. not effect
B. decrease
C. increase

Answer: Option C

Explanation:

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