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Compressors, Gas Turbines and Jet Engines

Compressors, Gas Turbines and Jet Engines
The pressure of air at the beginning of the compression stroke is ___ the atmospheric pressure.

More than
Equal to
Less than
None of the listed here

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Compressors, Gas Turbines and Jet Engines
Maximum work is done in compressing air when the compression is

Polytropic
Adiabatic
Isothermal
None of these

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Compressors, Gas Turbines and Jet Engines
The absolute pressure of air at the outlet of a compressor is called

Critical pressure
Discharge pressure
None of the listed here
Back pressure

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Compressors, Gas Turbines and Jet Engines
A closed gas turbine in which fuel is burnt directly in the air is not possible because of

Paucity of O2
High specific volume
Increasing gas temperature
High friction losses

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Compressors, Gas Turbines and Jet Engines
In axial flow compressor, exit flow angle deviation from the blade angle is a function of

Blade camber and space-chord ratio
Blade camber
Space-chord ratio
Blade camber and incidence angle

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

Start-stop motor
Relief valve
Variable speed
Constant speed unloader

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