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Compressors, Gas Turbines and Jet Engines

Compressors, Gas Turbines and Jet Engines
The compression ratio in a gas turbine is of the order of

0.20902777777778
3.5 : 1
0.33402777777778
0.50069444444444

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Compressors, Gas Turbines and Jet Engines
High air-fuel ratio in gas turbines

Reduces exhaust temperature
Improves thermal efficiency
Do not damage turbine blades
Increases power output

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Compressors, Gas Turbines and Jet Engines
High air-fuel ratio is used in gas turbines

To save fuel
To increase the efficiency
To reduce the exit temperature
To increase the output

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Compressors, Gas Turbines and Jet Engines
Mechanical efficiency of gas turbines as compared to I.C engines is

Higher
Lower
Same
None of these

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Compressors, Gas Turbines and Jet Engines
The criterion of the thermodynamic efficiency for rotary compressor is

None of the listed here
Polytropic compression
Isothermal compression
Isentropic compression

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Compressors, Gas Turbines and Jet Engines
Efficiency of gas turbine is increased by

Adding a regenerator
Inter cooling
Reheating
All of the listed here

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