Q. Uranium has isotopes

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Q. The colour of exhaust from diesel engine is generally

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Q. In compression ignition engines, swirl denotes a

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Q. A mixture containing 65% of iso-octane and 35% of normal heptane will have

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Q. Which of the following statement is wrong ?

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Q. The maximum propulsive efficiency of a turbo-jet engine is at a speed of

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Q. In order to mix air and petrol in the required proportion and to supply it to the engine during suction stroke, then __________ is employed.

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Q. The indicated power for multi-cylinder engine will be same as that of a single cylinder engine.

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Q. In order to prevent knocking in spark ignition engines, the charge away from the spark plug should have

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Q. The size of a reactor at which the chain reaction can be initiated (i.e. when system becomes critical) with just enough fissionable material (called critical mass of fuel) is known as critical size of reactor.

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Q. The mechanical efficiency (ηm) of the engine is given by

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Q. A gas engine has a swept volume of 300 cm³ and clearance volume of 25 cm³. Its volumetric efficiency is 0.88 and mechanical efficiency is 0.90. The volume of the mixture taken in per stroke is

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Q. The correct sequence of the decreasing order of brake thermal efficiency of the three given basic types of engines is

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Q. The engines in which the combustion of fuel takes place inside the engine cylinder are called internal combustion engines.

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Q. A fuel will detonate less if it has higher self ignition temperature.

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Q. The combustion in compression ignition engines is

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Q. Which of the following fuel detonates readily ?

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Q. If the speed of the engine is increased, the indicated power will

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Q. The petrol engines are also known as __________ engines.

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Q. The specific fuel consumption per B.P. hour for a petrol engine is about

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