Q. The ratio of the work obtained at the crankshaft in a given time to the energy supplied during the same time is called

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Q. Plutonium (Pu239) is produced

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Q. A petrol engine has compression ratio from

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Q. Detonation is harmful due to

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Q. The brake power (B.P.) of the engine is given by (where W = Brake load or dead load in newtons, l = Length of arm in metres, N = Speed of engine in r.p.m., S - Spring balance reading in newtons, D = Dia. of brake drum in metres, and d = Dia. of rope in metres)

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Q. A power plant giving least running cost of production of electrical power is

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Q. The thermal efficiency of petrol and gas engines is about

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Q. The firing order in an I.C. engine depends upon

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Q. The cetane number of diesel oil, generally available, is

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Q. The object of providing masked inlet valve in the air passage of compression ignition engines is to

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Q. During suction stroke of a four stroke petrol engine, the inlet valve opens and the charge is sucked into the cylinder as the piston moves upwards from the bottom dead centre.

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Q. The power actually developed by the engine cylinder of an I.C. engine is known as

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Q. A nuclear reactor is said to be critical when the neutron population in the reactor core is

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Q. A long delay period in compression ignition engines gives a more rapid rise in pressure which causes knocking.

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Q. A fission chain reaction in uranium can be developed

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Q. Thermal efficiency of a two stroke cycle engine is __________ a four stroke cycle engine.

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Q. A supercharged engine as compared to an ordinary engine

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Q. Which one of the following engines will have heavier flywheel than the remaining ones?

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Q. In petrol engines, using a fixed octane rating fuel, the increase in engine speed will decrease the knocking tendency.

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Q. Materials which make good moderators do not make good reflectors.

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