Compressors, Gas Turbines and Jet Engines
The following is true for an open cycle gas turbine having exhaust heat exchanger. Atmospheric air before entering the compressor is

Bled gas from turbine is heated and readmitted for complete expansion
Exhaust gases drive the compressor
Heated
Compressed air before entering the combustion chamber is heated

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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
Actual volume of the air delivered by the compressor when reduced to normal temperature and pressure conditions
Volume of air delivered by the compressor
None of these

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Compressors, Gas Turbines and Jet Engines
Volumetric efficiency of a compressor without clearance volume

Increases with increase in compression ratio
May increase/decrease depending on compressor capacity
Decreases with increase in compression ratio
Is not dependent upon compression ratio

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