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Compressors, Gas Turbines and Jet Engines

Compressors, Gas Turbines and Jet Engines
A machine used to raise the pressure of air is called

Gas turbine
Air motor
Compressor
I.C engine

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Compressors, Gas Turbines and Jet Engines
In axial flow compressor, exit flow angle deviation from the blade angle is a function of

Blade camber and incidence angle
Blade camber and space-chord ratio
Blade camber
Space-chord ratio

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Compressors, Gas Turbines and Jet Engines
The clearance volume of the air compressor is kept minimum because

It greatly affects volumetric efficiency
It results in minimum work
It permits isothermal compression
It allows maximum compression to be achieved

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Compressors, Gas Turbines and Jet Engines
The performance of air compressor at high altitudes will be ________ as compared to that at sea level.

None of these
Higher
Lower
Same

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Compressors, Gas Turbines and Jet Engines
Inter cooling in compressors

Results in saving of power in compressing a given volume to given pressure
Is the standard practice for big compressors
Enables compression in two stages
Cools the delivered air

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

Increases
Does not change
Decreases
First decrease and then increase

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