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Compressors, Gas Turbines and Jet Engines

Compressors, Gas Turbines and Jet Engines
Ratio of indicated H.P. and brake H.P. is known as

Adiabatic efficiency
Volumetric efficiency
Isothermal efficiency
Mechanical efficiency

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Compressors, Gas Turbines and Jet Engines
Reheating in a multistage expansion gas turbine ________ compressor work.

Has no effect on
Decreases
None of these
Increases

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Compressors, Gas Turbines and Jet Engines
The efficiency of the vane blower is (where W₁ = Workdone due to compression, and W₂ = Workdone due to back flow)

W₁/(W₁ + W₂)
W₂/(W₁ + W₂)
(W₁ + W₂)/W₁
(W₁ + W₂)/W₂

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Compressors, Gas Turbines and Jet Engines
Which is false statement about air receivers?

These increase compressor efficiency
These knock out some oil and moisture
These are used to dampen pulsations
These act as reservoir to take care of sudden demands

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Compressors, Gas Turbines and Jet Engines
Gas turbine as compared to steam turbine

Requires less space for installation
Has compressor and combustion chamber
Has less efficiency
All of these

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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
None of these
Less than
Equal to

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