Compressors, Gas Turbines and Jet Engines
The volumetric efficiency of a compressor

Increases with increase in compression ratio
Increases with decrease in compression ratio
Decreases with decrease in compression ratio
Decreases with increase in compression ratio

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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?

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

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