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Compressors, Gas Turbines and Jet Engines

Compressors, Gas Turbines and Jet Engines
The combustion efficiency of a gas turbine using perfect combustion chamber is of the order of

0.9
0.75
0.99
0.85

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Compressors, Gas Turbines and Jet Engines
The pressure and temperature conditions of air at the suction of compressor are

Slightly less than atmospheric
Slightly more than atmospheric
Atmospheric
Pressure slightly less than atmospheric and temperature slightly more than atmospheric

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Compressors, Gas Turbines and Jet Engines
A turboprop is preferred to turbojet because

It has high propulsive efficiency at high speeds
It can fly at high elevations
It has high power for take off
It can fly at supersonic speeds

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

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

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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
Better mechanical balance
Less loss of air due to leakage past the cylinder

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Compressors, Gas Turbines and Jet Engines
An air receiver is to be placed outside. Should it be placed in

Rain
Sun
Enclosed room
Shade

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