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Compressors, Gas Turbines and Jet Engines

Compressors, Gas Turbines and Jet Engines
In gas turbines, high thermal efficiency is obtained in

Closed cycle & Open cycle
Closed cycle
Open cycle
Closed/open depending on other considerations

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Compressors, Gas Turbines and Jet Engines
The working fluid in a turbine is

In the form of air and water mixture
In a single phase
In three phases
In two phases

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Compressors, Gas Turbines and Jet Engines
Isothermal compression efficiency, even when running at high speed, can be approached by using

Both (A) and (B) above
Fully insulating the cylinder
Multistage compression
Cold water spray

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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

Mechanical efficiency
Volumetric efficiency
Isothermal efficiency
Compressor efficiency

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Compressors, Gas Turbines and Jet Engines
In a centrifugal compressor, an increase in speed at a given pressure ratio causes

Decrease in flow
Increase in flow
Increase in flow and decrease in efficiency
Increase in efficiency

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Compressors, Gas Turbines and Jet Engines
The work ratio of simple gas turbine cycle depends on

Maximum cycle temperature
All of these
Minimum cycle temperature
Pressure ratio

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