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Compressors, Gas Turbines and Jet Engines

Compressors, Gas Turbines and Jet Engines
The work-done on a compressor will be minimum if air is taken from

A source of high temperature air
The atmosphere
A source of low temperature air
A source at 0° C

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Compressors, Gas Turbines and Jet Engines
The thermal efficiency of a simple gas turbine for a given turbine inlet temperature with increase in pressure ratio

Increases
Decreases
First increases and then decreases
First decreases and then increases

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Compressors, Gas Turbines and Jet Engines
The ratio of the discharge pressure to the inlet pressure of air is called

Compression ratio
Volumetric efficiency
Compressor efficiency
Expansion ratio

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Compressors, Gas Turbines and Jet Engines
The power available for takeoff and climb in case of turbojet engine as compared to reciprocating engine is

Less
May be less or more depending on ambient conditions
Same
More

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Compressors, Gas Turbines and Jet Engines
In jet propulsion power unit, the inlet duct of diverging shape is used in order to

Collect more air
Provide robust structure
Convert kinetic energy of air into pressure energy
Beautify the shape

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Compressors, Gas Turbines and Jet Engines
The maximum compression ratio in an actual single stage axial flow compressor is of the order of

0.048611111111111
0.045138888888889
0.043055555555556
0.00070833333333333

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MORE MCQ ON Compressors, Gas Turbines and Jet Engines

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