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Compressors, Gas Turbines and Jet Engines

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

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

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Compressors, Gas Turbines and Jet Engines
In jet propulsion power unit, the inlet duct of diverging shape is used in order to

Provide robust structure
Collect more air
Convert kinetic energy of air into pressure energy
Beautify the shape

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Compressors, Gas Turbines and Jet Engines
For an irreversible gas turbine cycle, the efficiency and work ratio both depend on

Minimum cycle temperature alone
Both pressure ratio and maximum cycle temperature
Maximum cycle temperature alone
Pressure ratio alone

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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
There is a certain pressure ratio (optimum) for a gas turbine at which its thermal efficiency is maximum. With increase in turbine temperature, the value of pressure ratio for the peak efficiency would

Increase
Remain same
None of these
Decrease

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Compressors, Gas Turbines and Jet Engines
Rotary compressors are used for delivering

Small quantities of air at high pressures
Large quantities of air at high pressures
Small quantities of air at low pressures
Large quantities of air at low pressures

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