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Compressors, Gas Turbines and Jet Engines

Compressors, Gas Turbines and Jet Engines
The ratio of the volume of free air delivery per stroke to the swept volume of the piston, is known as

Compressor efficiency
Mechanical efficiency
Volumetric efficiency
Isothermal efficiency

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Compressors, Gas Turbines and Jet Engines
In a single acting reciprocating compressor, the suction, compression and delivery of air takes place in ________ of the piston.

Three strokes
One stroke
Four strokes
Two strokes

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

I.C engine
Air motor
Gas turbine
Compressor

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

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

Adiabatic
Polytropic
Isothermal
None of these

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Compressors, Gas Turbines and Jet Engines
The efficiency of jet engine is

Lower at low speed
Same at all altitudes
Higher at high altitudes
Higher at high speed

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