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

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

Which one of the following is the effect of blade shape on performance of a centrifugal compressor?

Forward curved blades has higher efficiency

Forward curved blades produce lower pressure ratio

Backward curved blades has poor efficiency

Backward curved blades lead to stable performance

Correct Answer : Option (B) : Forward curved blades produce lower pressure ratio

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The work ratio of simple gas turbine cycle depends on

Pressure ratio

Minimum cycle temperature

Maximum cycle temperature

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

None of the above

Correct Answer : transient region

Explanation : Knudsen number ranges in between 0.3 and 1 in transient region.

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

Correct Answer : 1

Explanation : When altitude of earth is in between 90 km and 150 km Knudsen number can be in between 0.3 and 1.