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

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Compressors, Gas Turbines and Jet Engines
Clearance volume in actual reciprocating compressors is essential

To accommodate Valves in the cylinder head
To provide cushioning effect
To attain high volumetric efficiency
To provide cushioning effect and also to avoid mechanical bang of piston with cylinder head

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