Compressors, Gas Turbines and Jet Engines
For minimum work in multistage compression, assuming same index of compression in all stages

Work done in all stages should be equal
Work done in subsequent stages should decrease
Work done in first stage should be more
Work done in subsequent stages should increase

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

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

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Compressors, Gas Turbines and Jet Engines
The compressor capacity is defined as the

Volume of air sucked by the compressor during its suction stroke
Volume of air delivered by the compressor
Actual volume of the air delivered by the compressor when reduced to normal temperature and pressure conditions
None of these

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