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Compressors, Gas Turbines and Jet Engines

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

Gas turbine
Air motor
I.C engine
Compressor

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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
Isothermal efficiency
Compressor efficiency

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Compressors, Gas Turbines and Jet Engines
The net work input required for compressor with increase in clearance volume

Decreases
Increases
Remains same
Increases/decreases depending on compressor capacity

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Compressors, Gas Turbines and Jet Engines
The weight per horse power ratio for gas in Turbine as compared to I.C. engine and steam turbine is

Same
None of these
Higher
Lower

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Compressors, Gas Turbines and Jet Engines
The blades of gas turbine are made of

High alloy steel
Stainless steel
Carbon steel
High nickel alloy

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Compressors, Gas Turbines and Jet Engines
Pick up the wrong statement about advantages of multistage compression

Air can be cooled perfectly in between
More loss of air due to leakage past the cylinder
Better lubrication is possible advantages of multistage
Mechanical balance is better

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