Compressors, Gas Turbines and Jet Engines
The volumetric efficiency of a compressor

Increases with increase in compression ratio
Decreases with decrease in compression ratio
Decreases with increase in compression ratio
Increases with decrease in compression ratio

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Compressors, Gas Turbines and Jet Engines
Ratio of compression is the ratio of

Pressures at discharge and suction corresponding to same temperature
Stroke volume and clearance volume
Absolute discharge pressure to the absolute intake pressure
Gauge discharge pressure to the gauge intake pressure

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Compressors, Gas Turbines and Jet Engines
Inter-cooling in gas turbine results in

Increase in net output but decrease in thermal efficiency
Decrease in both thermal efficiency and net output
Increase in both thermal efficiency and net output
Increase in thermal efficiency but decrease in net output

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