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Compressors, Gas Turbines and Jet Engines

Compressors, Gas Turbines and Jet Engines
The gas in cooling chamber of a closed cycle gas turbine is cooled at

Constant pressure
Constant temperature
None of the listed here
Constant volume

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Compressors, Gas Turbines and Jet Engines
If the clearance ratio for a reciprocating air compressor is 'K', then its volumetric efficiency is given by

1 + k - k (p₂/p₁) n-1/n
1 - k + k (p₁/p₂) n- 1/n
1 - k + k (p₁/p₂)1/n
1 + k - k (p₂/p₁)1/n

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Compressors, Gas Turbines and Jet Engines
Water is injected in gas turbine cycle to

Increase efficiency
Control fire hazards
Control temperature
Control output of turbine

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Compressors, Gas Turbines and Jet Engines
In a four stage compressor, if the pressure at the first and third stage is 1 bar and 16 bar, then the delivery pressure at the fourth stage will be

1 bar
16 bar
256 bar
64 bar

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Compressors, Gas Turbines and Jet Engines
When the outlet angle from the rotor of a centrifugal compressor is more than 90°, then the blades are said to be

Forward curved
Radial
Backward curved
None of the listed here

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Compressors, Gas Turbines and Jet Engines
Surging is the phenomenon of

Motion of air at sonic velocity
Unsteady, periodic and reversed flow
Air stream not able to follow the blade contour
Air stream blocking the passage

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MORE MCQ ON Compressors, Gas Turbines and Jet Engines

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