Q. Ordinary water is sometimes used as moderator when enriched uranium is used as a fuel in nuclear power plants.

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Q. The compensating jet in a carburettor supplies almost constant amount of petrol at all speeds because the

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Q. The effective inhibitor of pre-ignition is

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Q. The purpose of testing an internal combustion engine is

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Q. The thermal efficiency of diesel engines is about

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

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Q. 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.

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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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