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Compressors, Gas Turbines and Jet Engines

Compressors, Gas Turbines and Jet Engines
The inlet pressure is always ___ the discharge pressure.

Equal to
More than
None of the listed here
Less than

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Compressors, Gas Turbines and Jet Engines
The degree of reaction of an axial flow turbine is the ratio of isentropic temperature drop in a blade row to the

Adiabatic temperature drop in the stage
Total temperature drop
Total temperature drop in the stage
Total adiabatic temperature drop

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Compressors, Gas Turbines and Jet Engines
The maximum delivery pressure in a rotary air compressor is

10 bar
50 bar
30 bar
20 bar

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Compressors, Gas Turbines and Jet Engines
In a centrifugal compressor, the highest Mach number leading to shock wave in the fluid flow occurs at

Impeller inlet radius
Impeller outlet radius
Diffuser inlet radius
Diffuser outlet radius

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Compressors, Gas Turbines and Jet Engines
The mass of gas turbine per kW developed is about ________ as that of an I.C. engine.

One sixth
One fourth
One-half
Same

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Compressors, Gas Turbines and Jet Engines
The overall thermal efficiency of an ideal gas turbine plant is (where r = Pressure ratio)

r ɣ-1
1 - (1/r) ɣ-1/ɣ
1 - (1/r) ɣ/ɣ-1
1 - r ɣ-1

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