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Compressors, Gas Turbines and Jet Engines

Compressors, Gas Turbines and Jet Engines
Volumetric efficiency of a compressor decreases with ________ in compression ratio.

Remain same
Decrease
Increase
Does not change

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Compressors, Gas Turbines and Jet Engines
Only rocket engines can be propelled to space because

These engines can work on several fuels
They are not air breathing engines
They have high propulsion efficiency
They can generate very high thrust

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Compressors, Gas Turbines and Jet Engines
Axial flow compressor has the following advantage over centrifugal compressor

Higher pressure ratio per stage
Aerofoil blades are used
Larger air handling ability per unit frontal area
Higher average velocities

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Compressors, Gas Turbines and Jet Engines
Which is false statement about advantages of multistage compressor in comparison to single stage compressor?

Better mechanical balance
Less power requirement
Lower volumetric efficiency
Less loss of air due to leakage past the cylinder

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Compressors, Gas Turbines and Jet Engines
Gas turbines use following type of air compressor

Axial flow type
Lobe type
Reciprocating type
Centrifugal type

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Compressors, Gas Turbines and Jet Engines
Rotary compressor is best suited for

Small quantity of air at high pressure
Large quantity of air at low pressure
Small quantity of air at low pressure
Large quantity of air at high pressure

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