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Compressors, Gas Turbines and Jet Engines

Compressors, Gas Turbines and Jet Engines
Maximum work is done in compressing air when the compression is

Adiabatic
Isothermal
Polytropic
None of these

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Compressors, Gas Turbines and Jet Engines
A jet engine has

Propeller in front
Propeller on the top
Propeller at back
No propeller

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Compressors, Gas Turbines and Jet Engines
A machine used to raise the pressure of air is called

Gas turbine
Air motor
Compressor
I.C engine

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

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Compressors, Gas Turbines and Jet Engines
The thermodynamic efficiency of rotary compressor is based on

Polytropic compression
Adiabatic compression
Isentropic compression
Isothermal compression

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Compressors, Gas Turbines and Jet Engines
Pick up wrong statement. Surging phenomenon in centrifugal compressor depends on

Stagnation pressure at the outlet
Change in load
Mass flow rate
Pressure ratio

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