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Compressors, Gas Turbines and Jet Engines

Compressors, Gas Turbines and Jet Engines
For speed above 3000 km/hour, it is more advantageous to use

Turbojet engine
Ramjet engine
Rockets
Propellers

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Compressors, Gas Turbines and Jet Engines
Adiabatic compression is one in which

No heat leaves or enters the compressor cylinder during compression
Temperature rise follows a linear relationship
Temperature during compression remains constant
Work done is maximum

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Compressors, Gas Turbines and Jet Engines
A centrifugal compressor works on the principle of

Conversion of kinetic energy into pressure energy
Conversion of pressure energy into kinetic energy
Centripetal action
Generating pressure directly

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Compressors, Gas Turbines and Jet Engines
Actual compression curve is

Better than isothermal and adiabatic
In between isothermal and adiabatic
Same as adiabatic
Same as isothermal

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Compressors, Gas Turbines and Jet Engines
An after-cooler is used to

Remove impurities from air
Reduce volume of air
Cool the air
Cause moisture and oil vapour to drop out

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Compressors, Gas Turbines and Jet Engines
In a single stage, single acting reciprocating air compressor, without clearance, the work-done on the air during isentropic compression is ________ the heat required to raise the temperature of air from T₁ to T₂ at a constant pressure.

Greater than
Less than
None of these
Equal to

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