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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
Half the jet velocity
Average of the jet velocity

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Compressors, Gas Turbines and Jet Engines
High air-fuel ratio is used in gas turbines

To save fuel
To reduce the exit temperature
To increase the efficiency
To increase the output

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Compressors, Gas Turbines and Jet Engines
Cylinder clearance in a compressor should be

As small as possible
About 100% of swept volume
As large as possible
About 50% of swept volume

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

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

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Compressors, Gas Turbines and Jet Engines
A jet engine has

Propeller in front
Propeller on the top
No propeller
Propeller at back

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Compressors, Gas Turbines and Jet Engines
Losses in a centrifugal compressor are due to

Inlet losses
All of the listed here
Diffuser losses
Impeller channel losses

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MORE MCQ ON Compressors, Gas Turbines and Jet Engines

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