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Compressors, Gas Turbines and Jet Engines

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

Polytropic compression
None of the listed here
Isentropic compression
Isothermal compression

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Compressors, Gas Turbines and Jet Engines
Turbofan engine employs

Two or more air streams
Solid fuel firing
One air stream
No air stream

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Compressors, Gas Turbines and Jet Engines
A closed cycle gas turbine gives ________ efficiency as compared to an open cycle gas turbine.

Same
Lower
Higher
None of these

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Compressors, Gas Turbines and Jet Engines
The volumetric efficiency of compressor with increase in compression ratio will

Increase
Decrease
Remain same
May increase or decrease depending on clearance volume

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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

150 KW
6000 KW
600 KW
15 KW

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Compressors, Gas Turbines and Jet Engines
The propulsive power of the rocket is (where v₁ = Jet velocity, and v₂ = Aircraft velocity)

(v₁ - v₂)²/2g
(v₁² -v₂²)/2g
(v₁² -v₂²)/g
(v₁ - v₂)²/g

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