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Compressors, Gas Turbines and Jet Engines

Compressors, Gas Turbines and Jet Engines
In an axial flow compressor, the ratio of pressure in the rotor blades to the pressure rise in the compressor in one stage is known as

Pressure coefficient
Slip factor
Degree of reaction
Work factor

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Compressors, Gas Turbines and Jet Engines
For an irreversible gas turbine cycle, the efficiency and work ratio both depend on

Pressure ratio alone
Minimum cycle temperature alone
Both pressure ratio and maximum cycle temperature
Maximum cycle temperature alone

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Compressors, Gas Turbines and Jet Engines
The compressor efficiency is the

Isothermal H.P./shaft H.R
Total output/air input
Isothermal H.P/indicated H.R
Compression work/motor input

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

Increases
None of these
Has no effect on
Decreases

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Compressors, Gas Turbines and Jet Engines
Which is false statement about advantages of multistage compressor in comparison to single stage compressor?

Lower volumetric efficiency
Less power requirement
Less loss of air due to leakage past the cylinder
Better mechanical balance

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Compressors, Gas Turbines and Jet Engines
A closed gas turbine in which fuel is burnt directly in the air is not possible because of

High friction losses
Increasing gas temperature
High specific volume
Paucity of O2

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