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Compressors, Gas Turbines and Jet Engines

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

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

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Compressors, Gas Turbines and Jet Engines
A rocket engine uses __________ for the combustion of its fuel.

Compressed atmospheric air
None of these
Its own oxygen
Surrounding air

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Compressors, Gas Turbines and Jet Engines
The air-fuel ratio in gas turbines is of the order of

50: 1.
15: 1
7: 1
30: 1

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Compressors, Gas Turbines and Jet Engines
Ratio of indicated h.p. to shaft h.p. in known as

Compressor efficiency
Mechanical efficiency
Volumetric efficiency
Isothermal efficiency

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Compressors, Gas Turbines and Jet Engines
Work ratio of a gas turbine may be improved by

Decreasing the compression work
Both (A) and (C) above
Increasing the compression work
Increasing the turbine work

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Compressors, Gas Turbines and Jet Engines
In air breathing jet engine, the jet is formed by expanding

Highly heated atmospheric air
Solids
Liquid
Plasma

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