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Compressors, Gas Turbines and Jet Engines

Compressors, Gas Turbines and Jet Engines
The volumetric efficiency for reciprocating air compressors is about

40 to 60%
10 to 40%
60 to 70%
70 to 90%

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Compressors, Gas Turbines and Jet Engines
The performance of air compressor at high altitudes will be ________ as compared to that at sea level.

Same
Lower
None of these
Higher

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Compressors, Gas Turbines and Jet Engines
Gas turbine as compared to steam turbine

All of these
Has compressor and combustion chamber
Requires less space for installation
Has less efficiency

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Compressors, Gas Turbines and Jet Engines
Adiabatic compression is one in which

Temperature rise follows a linear relationship
Work done is maximum
Temperature during compression remains constant
No heat leaves or enters the compressor cylinder during compression

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Compressors, Gas Turbines and Jet Engines
In the aircraft propellers

Propulsive matter is ejected from within the propelled body
The propulsive matter is caused to flow around the propelled body
All of these
Its functioning does not depend on presence of air

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Compressors, Gas Turbines and Jet Engines
For perfect intercooling in a three stage compressor

p₃/p₁ = p₄/p₂
p₁ p₂ = p₃ p₄
p₂/p₁ = p₃/p₂ = p₄/p₃
p₁ p₃ = p₂ p₄

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