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Compressors, Gas Turbines and Jet Engines

Compressors, Gas Turbines and Jet Engines
In jet engines, paraffin is usually used as the fuel because of its

Both (A) and (C) above
Ease of atomisation
Low freezing point
High calorific value

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Compressors, Gas Turbines and Jet Engines
If the flow of air through the compressor is perpendicular to its axis, then it is a

Axial flow compressor
Turbo compressor
Reciprocating compressor
Centrifugal compressor

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Compressors, Gas Turbines and Jet Engines
The air power of the compressor is also known as

None of these
Indicated power
Brake power
Frictional power

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Compressors, Gas Turbines and Jet Engines
The volumetric efficiency for reciprocating air compressors is about

10 to 40%
70 to 90%
40 to 60%
60 to 70%

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Compressors, Gas Turbines and Jet Engines
An after-cooler is used to

Remove impurities from air
Cause moisture and oil vapour to drop out
Cool the air
Reduce volume of air

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Compressors, Gas Turbines and Jet Engines
For supplying intermittent small quantity of air at high pressure, following compressor is best suited

Screw
Axial
Centrifugal
Reciprocating

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