Compressors, Gas Turbines and Jet Engines
The advantage of multistage compression over single stage compression is

Decreased discharge temperature
Lower power consumption per unit of air delivered
Higher volumetric efficiency
All of these

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Compressors, Gas Turbines and Jet Engines
Which of the following statement is correct as regard to centrifugal compressors?

The impeller rotates at high speeds
The maximum efficiency is higher than multistage axial flow compressors
The flow of air is parallel to the axis of the compressor
The static pressure of air in the impeller increases in order to provide centripetal force on the air

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