Which of the following statement is correct as regard to centrifugal compressors? - Compressors, Gas Dynamics and Gas Turbines Quiz

Mechanical Engineering : Compressors, Gas Dynamics and Gas Turbines - Quiz(MCQ)

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 multi-stage axial flow compressors.

The static pressure of air in the impeller increases in order to provide centripetal force on the air.

Correct Answer : Option (D) : The static pressure of air in the impeller increases in order to provide centripetal force on the air.

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The work ratio of simple gas turbine cycle depends on

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All of the above

Correct Answer : All of the above

Knudsen number ranges in between 0.3 and 1 in ________

boundary region

boundary & transient region

transient region

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Correct Answer : transient region

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When altitude of earth is in between 90 km and 150 km Knudsen number can be in between 0.3 and _________

Correct Answer : 1

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