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Compressors, Gas Turbines and Jet Engines

Compressors, Gas Turbines and Jet Engines
In a centrifugal compressor, the highest Mach number leading to shock wave in the fluid flow occurs at

Impeller inlet radius
Impeller outlet radius
Diffuser inlet radius
Diffuser outlet radius

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Compressors, Gas Turbines and Jet Engines
The efficiency of roots blower ________ with the increase in pressure ratio.

Increases
Does not change
None of these
Decreases

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Compressors, Gas Turbines and Jet Engines
A jet engine works on the principle of conservation of

Linear momentum
Mass
Flow
Energy

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Compressors, Gas Turbines and Jet Engines
If the flow of air through the compressor is parallel to its axis, then the compressor is

Reciprocating compressor
Turbo compressor
Centrifugal compressor
Axial flow compressor

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Compressors, Gas Turbines and Jet Engines
Free air is the air at

Atmospheric conditions at any specific location
20°C and 1 kg/cm² and relative humidity of 36%
15°C and 1 kg/cm²
0°C and standard atmospheric conditions

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Compressors, Gas Turbines and Jet Engines
The air-fuel ratio in gas turbines is of the order of

30: 1
7: 1
50: 1.
15: 1

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