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Compressors, Gas Turbines and Jet Engines

Compressors, Gas Turbines and Jet Engines
The area of actual indicator diagram on an air compressor as compared to area of ideal indicator diagram is

More
Same
Less
More/less depending on compressor capacity

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

0.4
0.3
0.2
0.5

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Compressors, Gas Turbines and Jet Engines
During base load operation, the best method of controlling compressor is

Constant speed unloader
Start-stop motor
Relief valve
Variable speed

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Compressors, Gas Turbines and Jet Engines
In a four stage compressor, if the pressure at the first and third stage is 1 bar and 16 bar, then the delivery pressure at the fourth stage will be

16 bar
256 bar
64 bar
1 bar

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Compressors, Gas Turbines and Jet Engines
There is a certain pressure ratio (optimum) for a gas turbine at which its thermal efficiency is maximum. With increase in turbine temperature, the value of pressure ratio for the peak efficiency would

None of these
Decrease
Remain same
Increase

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Compressors, Gas Turbines and Jet Engines
The compressor capacity with decrease in suction temperature

Decreases
May increase or decrease depending on compressor capacity
Increases
Remain unaffected

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