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Compressors, Gas Turbines and Jet Engines

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

Work factor
Pressure coefficient
Degree of reaction
Slip factor

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

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

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Compressors, Gas Turbines and Jet Engines
An air compressor may be controlled by

Any one of the above
Blow off control
Clearance control
Throttle control

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Compressors, Gas Turbines and Jet Engines
The work ratio of a gas turbine plant is defined as the ratio of

Net work output and isentropic heat drop
Net work output and work done by turbine
Actual heat drop and isentropic heat drop
Net work output and heat supplied

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Compressors, Gas Turbines and Jet Engines
Which is false statement about advantages of multistage compressor in comparison to single stage compressor?

Less loss of air due to leakage past the cylinder
Better mechanical balance
Less power requirement
Lower volumetric efficiency

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Compressors, Gas Turbines and Jet Engines
In gas turbines, high thermal efficiency is obtained in

Closed cycle & Open cycle
Closed/open depending on other considerations
Open cycle
Closed cycle

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