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Compressors, Gas Turbines and Jet Engines

Compressors, Gas Turbines and Jet Engines
Maximum delivery pressure is a rotary air compressor is of the order of

10 kg/cm²
16 kg/cm²
6 kg/cm²
25 kg/cm²

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Compressors, Gas Turbines and Jet Engines
The work ratio of simple gas turbine cycle depends on

Minimum cycle temperature
Pressure ratio
Maximum cycle temperature
All of these

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Compressors, Gas Turbines and Jet Engines
In a closed cycle gas turbine, the air is compressed

Isentropically
Polytropically
None of these
Isothermally

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Compressors, Gas Turbines and Jet Engines
In a single stage, single acting reciprocating air compressor without clearance volume, the work-done is maximum during

Isentropic compression
Polytropic compression
Isothermal compression
None of these

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Compressors, Gas Turbines and Jet Engines
Isothermal compression efficiency, even when running at high speed, can be approached by using

Multistage compression
Cold water spray
Both (A) and (B) above
Fully insulating the cylinder

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

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

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