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Compressors, Gas Turbines and Jet Engines

Compressors, Gas Turbines and Jet Engines
The main purpose of reheating in gas turbine is to

Increase power output
Increase speed
Reduce turbine size
Increase temperature

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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

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

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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
Diffuser outlet radius
Impeller outlet radius
Diffuser inlet radius

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Compressors, Gas Turbines and Jet Engines
In multistage compressor, the isothermal compression is achieved by

By insulating the cylinder
Employing inter-cooler
By running compressor at very slow speed
By constantly cooling the cylinder

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Compressors, Gas Turbines and Jet Engines
Volumetric efficiency of air compressors is of the order of

40 - 50%
70 - 90%
20 - 30%
60 - 70%

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Compressors, Gas Turbines and Jet Engines
Maximum temperature in a gas turbine is of the order of

1500°C
1000°C
700°C
2000°C

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