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Compressors, Gas Turbines and Jet Engines

Compressors, Gas Turbines and Jet Engines
The degree of reaction is usually kept ________ for all types of axial flow compressors.

0.3
0.5
0.4
0.2

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Compressors, Gas Turbines and Jet Engines
Water is injected in gas turbine cycle to

Control fire hazards
Control output of turbine
Increase efficiency
Control temperature

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Compressors, Gas Turbines and Jet Engines
The clearance volume of the air compressor is kept minimum because

It permits isothermal compression
It results in minimum work
It allows maximum compression to be achieved
It greatly affects volumetric efficiency

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Compressors, Gas Turbines and Jet Engines
The thermal efficiency of a gas turbine as compared to a diesel plant is

Depends on other factors
Same
Less
More

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Compressors, Gas Turbines and Jet Engines
The volumetric efficiency of compressor with increase in compression ratio will

Increase
May increase or decrease depending on clearance volume
Remain same
Decrease

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Compressors, Gas Turbines and Jet Engines
Maximum delivery pressure is a rotary air compressor is of the order of

6 kg/cm²
10 kg/cm²
25 kg/cm²
16 kg/cm²

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