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Compressors, Gas Turbines and Jet Engines

Compressors, Gas Turbines and Jet Engines
The stagnation pressure rise in a centrifugal compressor takes place

In the inlet guide vanes only
In the impeller only
In the diffuser and impeller
In the diffuser only

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Compressors, Gas Turbines and Jet Engines
The degree of reaction of an axial flow turbine is the ratio of isentropic temperature drop in a blade row to the

Total temperature drop in the stage
Total adiabatic temperature drop
Adiabatic temperature drop in the stage
Total temperature drop

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Compressors, Gas Turbines and Jet Engines
The maximum propulsion efficiency of a turbojet is attained at around following speed

550 km/hr
1050 km/hr
1700 km/hr
2400 km/hr

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Compressors, Gas Turbines and Jet Engines
Reciprocating air compressor is best suited for

Small quantity of air at high pressure
Large quantity of air at high pressure
Small quantity of air at low pressure
Large quantity of air at low pressure

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Compressors, Gas Turbines and Jet Engines
A rocket works with maximum overall efficiency when air craft velocity is equal to the

Half the jet velocity
Average of the jet velocity
Twice the jet velocity
Jet velocity

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Compressors, Gas Turbines and Jet Engines
The type of rotary compressor used in aeroplanes, is of

Radial flow type
Axial flow type
Centrifugal type
None of these

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