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Compressors, Gas Turbines and Jet Engines

Compressors, Gas Turbines and Jet Engines
The mass of gas turbine per kW developed is about ________ as that of an I.C. engine.

One fourth
One sixth
One-half
Same

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Compressors, Gas Turbines and Jet Engines
If infinite number of heaters be used in a gas turbine, then expansion process in turbine approaches

Isochoric
Isothermal
Isentropic
Adiabatic

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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 isothermal
Same as adiabatic

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Compressors, Gas Turbines and Jet Engines
The efficiency and work ratio of a gas turbine plant can be increased by

All of these
Adding heat exchanger
Reheating the air after partial expansion in the turbine
Injecting water in/around combustion chamber

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

Decrease the delivery temperature for ease in handling
Cause moisture and oil vapour to drop out
Reduce volume
Cool the air

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Compressors, Gas Turbines and Jet Engines
In a high pressure compressor, the delivery pressure is

8 to 10 bar
1 to 5 bar
5 to 8 bar
10 to 15 bar

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