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Compressors, Gas Turbines and Jet Engines

Compressors, Gas Turbines and Jet Engines
Gas turbine as compared to internal combustion engine

Has more efficiency
All of the listed here
Can be driven at a very high speed
Produces uniform torque

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Compressors, Gas Turbines and Jet Engines
For maximum work, the reheating should be done to an intermediate pressure of (Where p₁ = Maximum pressure, and p₂ = Minimum pressure)

p₁ p₂
p₁/p₂
(p₁ + p₂)/2
(p₁ - p₂)/2

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Compressors, Gas Turbines and Jet Engines
In a reciprocating air compressor, the compression work per kg of air

Decreases as clearance volume increases
Is independent of clearance volume
Increases as clearance volume decreases
Increases as clearance volume increases

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Compressors, Gas Turbines and Jet Engines
Isothermal compression though most efficient, but is not practicable because

It is impossible in practice
It does not increase pressure much
It requires very big cylinder
Compressor has to run at very slow speed to achieve it

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Compressors, Gas Turbines and Jet Engines
The ratio of work done per cycle to the swept volume in case of compressor is called

Compression index
Compressor efficiency
Compression ratio
Mean effective pressure

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Compressors, Gas Turbines and Jet Engines
A closed cycle gas turbine works on

Rankine cycle
Ericsson cycle
Joule cycle
Carnot cycle

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MORE MCQ ON Compressors, Gas Turbines and Jet Engines

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