Compressors, Gas Turbines and Jet Engines
For minimum work required to compress and deliver a quantity of air by multistage compression

The work-done in each stage should be same
All of the listed here
The compression ratio in each stage should be same
The intercooling should be perfect

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Compressors, Gas Turbines and Jet Engines
Which of the following statement is correct as regard to centrifugal 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
The maximum efficiency is higher than multistage axial flow compressors
The impeller rotates at high speeds

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