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Compressors, Gas Turbines and Jet Engines

Compressors, Gas Turbines and Jet Engines
During peak load periods, the best method of controlling compressors is

Variable speed
Start-stop motor
Relief valve
Constant speed unloader

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Compressors, Gas Turbines and Jet Engines
Work ratio of a gas turbine may be improved by

Increasing the turbine work
Both (A) and (C) above
Increasing the compression work
Decreasing the compression work

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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

Mechanical efficiency
Volumetric efficiency
Compressor efficiency
Isothermal efficiency

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Compressors, Gas Turbines and Jet Engines
1 m of air at atmospheric condition weighs approximately

0.5 kg
2.2 kg
1.0 kg
1.3 kg

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Compressors, Gas Turbines and Jet Engines
The ratio of the discharge pressure to the inlet pressure of air is called

Compressor efficiency
Expansion ratio
Compression ratio
Volumetric efficiency

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Compressors, Gas Turbines and Jet Engines
Reciprocating air compressor is best suited for

Large quantity of air at low pressure
Small quantity of air at low pressure
Small quantity of air at high pressure
Large quantity of air at high pressure

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