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Compressors, Gas Turbines and Jet Engines

Compressors, Gas Turbines and Jet Engines
After-cooler is used to

Cause moisture and oil vapour to drop out
Decrease the delivery temperature for ease in handling
Reduce volume
Cool the air

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Compressors, Gas Turbines and Jet Engines
During base load operation, the best method of controlling compressor is

Relief valve
Variable speed
Constant speed unloader
Start-stop motor

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Compressors, Gas Turbines and Jet Engines
The work ratio of simple gas turbine cycle depends on

Pressure ratio
All of these
Maximum cycle temperature
Minimum cycle temperature

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

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

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Compressors, Gas Turbines and Jet Engines
The ratio of outlet whirl velocity to blade velocity in case of centrifugal compressor is called

None of these
Velocity coefficient
Velocity factor
Slip factor

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Compressors, Gas Turbines and Jet Engines
The volumetric efficiency of compressor with increase in compression ratio will

May increase or decrease depending on clearance volume
Increase
Remain same
Decrease

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MORE MCQ ON Compressors, Gas Turbines and Jet Engines

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