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Compressors, Gas Turbines and Jet Engines

Compressors, Gas Turbines and Jet Engines
The output of a gas turbine is 300 KW and its efficiency is 20 percent, the heat supplied is

600 KW
15 KW
6000 KW
150 KW

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Compressors, Gas Turbines and Jet Engines
Isothermal compression though most efficient, but is not practicable because

Compressor has to run at very slow speed to achieve it
It is impossible in practice
It does not increase pressure much
It requires very big cylinder

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Compressors, Gas Turbines and Jet Engines
The degree of reaction of an axial flow turbine is the ratio of isentropic temperature drop in a blade row to the

Total temperature drop
Total adiabatic temperature drop
Total temperature drop in the stage
Adiabatic temperature drop in the stage

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Compressors, Gas Turbines and Jet Engines
For supplying intermittent small quantity of air at high pressure, following compressor is best suited

Axial
Reciprocating
Centrifugal
Screw

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Compressors, Gas Turbines and Jet Engines
Inter cooling in compressors

Cools the delivered air
Enables compression in two stages
Results in saving of power in compressing a given volume to given pressure
Is the standard practice for big compressors

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Compressors, Gas Turbines and Jet Engines
The fuel consumption in gas turbines is accounted for by

Lower heating value
Higher calorific value
Heating value
Higher heating value

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MORE MCQ ON Compressors, Gas Turbines and Jet Engines

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