10) The predominent isotope of the naturally occuring element is

U₂₃₅

U₂₃₈

Pu₂₃₉

Pu₂₃₃

Answer is:

U₂₃₈

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11) The brake power of a diesel engine, keeping other parameters constant, can be increased by

decreasing the density of intake air

increasing the temperature of intake air

increasing the pressure of intake air

decreasing the pressure of intake air

Answer is:

increasing the pressure of intake air

12) 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.

Agree

Disagree

Answer is:

Agree

13) Pre-ignition is caused by the spontantaneous combustion of the mixture before the end of the compression stroke, and is due to

cylinder walls being too hot

overheated spark plug points

red hot carbon deposits on cylinder walls

any one of these

Answer is:

any one of these

14) The expansion of fuel in a four stroke cycle diesel engine

starts at 15 Degree before top dead centre and ends at 30 Degree after top dead centre

starts at top dead centre and ends at 30? after top dead centre

starts at 15 Degree after top dead centre and ends at 30 Degree before bottom dead centre

may start and end anywhere

Answer is:

starts at 15 Degree before top dead centre and ends at 30 Degree after top dead centre

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10) The predominent isotope of the naturally occuring element is

U238

IC Engines and Nuclear Power Plants MCQ with Answers

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11) The brake power of a diesel engine, keeping other parameters constant, can be increased by

increasing the pressure of intake air

12) 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.

Agree

13) Pre-ignition is caused by the spontantaneous combustion of the mixture before the end of the compression stroke, and is due to

any one of these

14) The expansion of fuel in a four stroke cycle diesel engine

starts at 15 Degree before top dead centre and ends at 30 Degree after top dead centre

IC Engines and Nuclear Power Plants MCQ with Answers

U₂₃₈