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COMPRESSORS, GAS TURBINES AND JET ENGINES

Compressors, Gas Turbines and Jet Engines
The air is delivered ________ in one revolution in case of a three lobbed rotor.

Six times
Four times
Two times
Three times

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Compressors, Gas Turbines and Jet Engines
Losses in a centrifugal compressor are due to

Impeller channel losses
Diffuser losses
Inlet losses
All of the listed here

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Compressors, Gas Turbines and Jet Engines
Diffuser in a compressor is used to

Convert kinetic energy into pressure energy
Convert pressure energy into kinetic energy
Make the flow streamline
Increase velocity

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Compressors, Gas Turbines and Jet Engines
The ratio of the indicated power to the shaft power or brake power of the motor or engine required to drive the compressor, is called

Isothermal efficiency
Mechanical efficiency
Compressor efficiency
Volumetric efficiency

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Compressors, Gas Turbines and Jet Engines
Volumetric efficiency is

Index of compressor performance
Reciprocal of compression ratio
The ratio of the air actually delivered to the amount of piston displacement
The ratio of stroke volume to clearance volume

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