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Compressors, Gas Turbines and Jet Engines

Compressors, Gas Turbines and Jet Engines
The criterion of the thermodynamic efficiency for rotary compressor is

Isentropic compression
Isothermal compression
Polytropic compression
None of the listed here

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Compressors, Gas Turbines and Jet Engines
The indicated work per unit mass of air delivered is

Greatly affected by clearance volume
Not affected by clearance volume
Inversely proportional to clearance volume
Directly proportional to clearance volume

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Compressors, Gas Turbines and Jet Engines
The reason for volumetric efficiency of reciprocating compressor being less than 100 percent is

Clearance volume and leakages
Pressure drop across the valves
Superheating in compressor
All of these

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Compressors, Gas Turbines and Jet Engines
If the flow of air through the compressor is perpendicular to its axis, then it is a

Axial flow compressor
Turbo compressor
Reciprocating compressor
Centrifugal compressor

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Compressors, Gas Turbines and Jet Engines
Rotary compressors are used for delivering

Large quantities of air at low pressures
Small quantities of air at low pressures
Large quantities of air at high pressures
Small quantities of air at high pressures

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Compressors, Gas Turbines and Jet Engines
Reheating in multistage expansion gas turbine results in

Reduction in compressor work
Decrease of heat loss in exhaust
Maximum work output
High thermal efficiency

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