Q. The air-fuel ratio of the petrol engine is controlled by

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Q. If the compression ratio in I.C. engine increases, then its thermal efficiency will

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Q. The relative efficiency of an I.C. engine is the ratio of the indicated thermal efficiency to the air standard efficiency.

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Q. The volumetric efficiency ofa well designed engine may be

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Q. Which of the following statement is correct regarding the features of a Breeder reactor?

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Q. In diesel engines, the ignition takes place due to the heat produced in the engine cylinder at the end of compression.

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Q. The fuels in order of decreasing knock tendency for spark ignition engines are

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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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