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Compressors, Gas Turbines and Jet Engines

Compressors, Gas Turbines and Jet Engines
A rocket works with maximum overall efficiency when air craft velocity is equal to the

Twice the jet velocity
Jet velocity
Average of the jet velocity
Half the jet velocity

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Compressors, Gas Turbines and Jet Engines
In the aircraft propellers

All of these
The propulsive matter is caused to flow around the propelled body
Propulsive matter is ejected from within the propelled body
Its functioning does not depend on presence of air

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Compressors, Gas Turbines and Jet Engines
A rocket engine uses __________ for the combustion of its fuel.

Compressed atmospheric air
None of these
Its own oxygen
Surrounding air

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Compressors, Gas Turbines and Jet Engines
The ratio of the net work obtained from the gas turbine plant to the turbine work is known as

None of these
Pressure ratio
Work ratio
Compression ratio

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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

Centrifugal compressor
Reciprocating compressor
Axial flow compressor
Turbo compressor

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Compressors, Gas Turbines and Jet Engines
The closed cycle in gas turbines

Provides greater flexibility
Is used when gas is to be burnt
Provides lesser flexibility
In never used

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