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Compressors, Gas Turbines and Jet Engines

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

Frictional power
Brake power
None of these
Indicated power

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Compressors, Gas Turbines and Jet Engines
The indicated work per unit mass of air delivered is

Greatly affected by clearance volume
Inversely proportional to clearance volume
Not affected by clearance volume
Directly proportional to clearance volume

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Compressors, Gas Turbines and Jet Engines
The air is delivered ________ in one revolution in case of a three lobbed rotor.

Four times
Two times
Six times
Three times

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

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

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Compressors, Gas Turbines and Jet Engines
The ratio of outlet whirl velocity to blade velocity in case of centrifugal compressor is called

Slip factor
Velocity factor
Velocity coefficient
None of these

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Compressors, Gas Turbines and Jet Engines
With the decrease in compression ratio, the volumetric efficiency

Increases
Decreases
Does not change
First decrease and then increase

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