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

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Q. The expansion of fuel in a four stroke cycle diesel engine

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Q. The object of supercharging the engine is

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Q. The ratio of the volume of charge admitted at N.T.P. to the swept volume of the piston is called

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Q. The exhaust valve in a four stroke cycle petrol engine

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Q. Nuclear reactors are used

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Q. A moderator generally used in nuclear power plants is

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Q. The predominent isotope of the naturally occuring element is

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

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

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Q. Reactors for propulsion applications are designed for

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Q. The primary fuel used in nuclear power plants is

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

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Q. A turbo-jet does not require a turbine to drive the compressor.

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Q. For the same maximum pressure and heat input, the exhaust temperature of petrol engine is __________ than that of diesel engine.

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Q. The compression ratio in petrol engines is kept low as compared to diesel engines because higher compression ratio in petrol engines would lead to pre-ignition of fuel.

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Q. The cetane (C16H34) which is a straight chain paraffin is assigned a cetane number of

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Q. Morse test is used to determine the I.P. of a

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Q. The correct mixture strength (by weight) for petrol is about

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Q. The working pressure and temperature inside the cylinder of an internal combustion engine is __________ as compared to a steam engine.

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