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Compressors, Gas Turbines and Jet Engines

Compressors, Gas Turbines and Jet Engines
The hottest point in a gas turbine is

at the base
in the center
at the tip
between ~ to i of the blade height

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

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

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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
Plasma
Liquid
Solids

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Compressors, Gas Turbines and Jet Engines
During peak load periods, the best method of controlling compressors is

Variable speed
Relief valve
Start-stop motor
Constant speed unloader

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Compressors, Gas Turbines and Jet Engines
The efficiency of the vane blower is (where W₁ = Workdone due to compression, and W₂ = Workdone due to back flow)

W₁/(W₁ + W₂)
W₂/(W₁ + W₂)
(W₁ + W₂)/W₁
(W₁ + W₂)/W₂

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Compressors, Gas Turbines and Jet Engines
The effective power of gas turbines is increased by adding the following in compressor

Carbon dioxide
Nitrogen
Ammonia and water vapour
Hydrogen

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MORE MCQ ON Compressors, Gas Turbines and Jet Engines

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