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Compressors, Gas Turbines and Jet Engines

Compressors, Gas Turbines and Jet Engines
The weight per horse power ratio for gas in Turbine as compared to I.C. engine and steam turbine is

None of these
Lower
Higher
Same

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

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

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Compressors, Gas Turbines and Jet Engines
Propulsion efficiency of the following order is obtained in practice

0.5
0.72
0.6
0.34

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Compressors, Gas Turbines and Jet Engines
The temperature of air at the beginning of the compression stroke is ________ the atmospheric temperature.

More than
Less than
None of these
Equal to

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Compressors, Gas Turbines and Jet Engines
The absolute pressure of air at the outlet of a compressor is called

None of the listed here
Back pressure
Critical pressure
Discharge pressure

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Compressors, Gas Turbines and Jet Engines
Ratio of indicated h.p. to shaft h.p. in known as

Isothermal efficiency
Mechanical efficiency
Compressor efficiency
Volumetric efficiency

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