Compressors, Gas Turbines and Jet Engines
Which is false statement about multistage compression?

Power consumption per unit of air delivered is low
The moisture in air is condensed in the inter-cooler
It is best suited for compression ratios around 7:1
Volumetric efficiency is high

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Compressors, Gas Turbines and Jet Engines
The overall efficiency of the compressed air system is the

Ratio of shaft output of the air motor to the shaft input to the compressor
None of these
Ratio of shaft input to the compressor to the shaft output of air motor
Product of shaft output of air motor and shaft input to the compressor

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Compressors, Gas Turbines and Jet Engines
Clearance volume in actual reciprocating compressors is essential

To attain high volumetric efficiency
To provide cushioning effect and also to avoid mechanical bang of piston with cylinder head
To accommodate Valves in the cylinder head
To provide cushioning effect

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