Q. Enriched uranium may contain fissionable contents from

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Q. In a four stroke engine, the working cycle is completed in

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Q. If the fuel is rich in fissionable material, the reactor can be made more compact than if the percentage of fissionable atoms is small.

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

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Q. The ignition quality of diesel oil is expressed by

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Q. In a four stroke cycle petrol engine, the expansion

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Q. A fuel of an octane number rating of 75 matches in knocking intensity as a mixture of

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Q. A two stroke cycle engine gives __________ the number of power strokes as compared to the four stroke cycle engine, at the same engine speed.

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Q. By higher octane number of spark ignition fuel, it is meant that the fuel has

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Q. During idling, a petrol engine requires __________ mixture.

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Q. In natural uranium, the constituents of three naturally occuring isotopes are

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Q. Stoichiometric ratio is

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Q. Which of the following fuel has little tendency towards detonation ?

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Q. In a petrol engine, the fuel supplied to the engine cylinder is mixed with required quantity of air and the mixture is ignited with a

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Q. In petrol engines, using a fixed octane rating fuel, the increase in compression ratio will not effect the knocking tendency.

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Q. Supercharging is the process of supplying the intake air to the engine cylinder at a density __________ the density of the surrounding atmosphere.

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Q. The method of determination of indicated power of a multi cylinder spark ignition engine is by the use of

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Q. In a four stroke cycle petrol engine, , the compression

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Q. Reflector in nuclear power plants is used to reflect neutrons back into the active core.

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

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