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Compressors, Gas Turbines and Jet Engines

Compressors, Gas Turbines and Jet Engines
The ratio of outlet whirl velocity to blade velocity in case of centrifugal compressor is called

Velocity coefficient
None of these
Velocity factor
Slip factor

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Compressors, Gas Turbines and Jet Engines
The pressure ratio of an ideal vaned compressor with increase in mass flow rate

First decreases and then increases
Remain constant
Decreases
Increases

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Compressors, Gas Turbines and Jet Engines
In a single acting reciprocating air compressor, without clearance, the compression of air may be

Any one of these
Isentropic
Polytropic
Isothermal

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Compressors, Gas Turbines and Jet Engines
The ratio of specific weight/h.p. of gas turbine and I.C engines may be typically of the order of

0.042361111111111
0.16736111111111
0.084027777777778
0.045833333333333

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Compressors, Gas Turbines and Jet Engines
The ideal efficiency of simple gas turbine cycle depends on

Minimum cycle temperature
All of these
Maximum cycle temperature
Pressure ratio

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Compressors, Gas Turbines and Jet Engines
During peak load periods, the best method of controlling compressors is

Start-stop motor
Relief valve
Constant speed unloader
Variable speed

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