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Compressors, Gas Turbines and Jet Engines

Compressors, Gas Turbines and Jet Engines
The ratio of the volume of free air delivery per stroke to the swept volume of the piston, is known as

Volumetric efficiency
Mechanical efficiency
Isothermal efficiency
Compressor efficiency

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Compressors, Gas Turbines and Jet Engines
Axial flow compressor has the following advantage over centrifugal compressor

Higher pressure ratio per stage
Higher average velocities
Larger air handling ability per unit frontal area
Aerofoil blades are used

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

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

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Compressors, Gas Turbines and Jet Engines
The efficiency and work ratio of a gas turbine plant can be increased by

Injecting water in/around combustion chamber
Reheating the air after partial expansion in the turbine
All of these
Adding heat exchanger

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Compressors, Gas Turbines and Jet Engines
The thrust of a jet propulsion power unit can be increased by

All of these
Burning fuel after gas turbine
Injecting ammonia into the combustion chamber
Injecting water into the compressor

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Compressors, Gas Turbines and Jet Engines
Gas turbines for power generation are normally used

In emergency
To enable start thermal power plant
To supply peak load requirements
To supply base load requirements

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MORE MCQ ON Compressors, Gas Turbines and Jet Engines

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