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

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Compressors, Gas Turbines and Jet Engines
Ratio of compression is the ratio of

Pressures at discharge and suction corresponding to same temperature
Stroke volume and clearance volume
Gauge discharge pressure to the gauge intake pressure
Absolute discharge pressure to the absolute intake pressure

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