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

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Compressors, Gas Turbines and Jet Engines
Which one of the following is the effect of blade shape on performance of a centrifugal compressor?

Forward curved blades produce lower pressure ratio
Backward curved blades lead to stable performance
Forward curved blades has higher efficiency
Backward curved blades has poor efficiency

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