Compressors, Gas Turbines and Jet Engines
The overall isothermal efficiency of the compressor is defined as the ratio of

Isothermal power to the shaft power or B.P. of the motor or engine required to drive the compressor
Volume of free air delivery per stroke to the swept volume of the piston
Isentropic power to the power required to drive the compressor
Work required to compress the air isothermally to the actual work required to compress the air for the same pressure ratio

ANSWER DOWNLOAD EXAMIANS APP

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
Forward curved blades has higher efficiency
Backward curved blades lead to stable performance

ANSWER DOWNLOAD EXAMIANS APP