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Compressors, Gas Turbines and Jet Engines

Compressors, Gas Turbines and Jet Engines
A rocket engine uses __________ for the combustion of its fuel.

Its own oxygen
Compressed atmospheric air
None of these
Surrounding air

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Compressors, Gas Turbines and Jet Engines
The overall thermal efficiency of an ideal gas turbine plant is (where r = Pressure ratio)

1 - (1/r) ɣ/ɣ-1
r ɣ-1
1 - (1/r) ɣ-1/ɣ
1 - r ɣ-1

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Compressors, Gas Turbines and Jet Engines
The compression ratio for the compressor is always _________ unity.

Less than
More than
Equal to
None of these

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Compressors, Gas Turbines and Jet Engines
The maximum delivery pressure in a rotary air compressor is

50 bar
10 bar
20 bar
30 bar

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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
Work factor
Degree of reaction
Slip factor

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Compressors, Gas Turbines and Jet Engines
High air-fuel ratio in gas turbines

Do not damage turbine blades
Reduces exhaust temperature
Improves thermal efficiency
Increases power output

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MORE MCQ ON Compressors, Gas Turbines and Jet Engines

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