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Compressors, Gas Turbines and Jet Engines

Compressors, Gas Turbines and Jet Engines
An air receiver is to be placed outside. Should it be placed in

Shade
Rain
Enclosed room
Sun

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Compressors, Gas Turbines and Jet Engines
In a single stage, single acting reciprocating air compressor, without clearance volume, the work-done is minimum during

Isothermal compression
Polytropic compression
Isentropic compression
None of these

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

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

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Compressors, Gas Turbines and Jet Engines
Reheating in a gas turbine

Increases the compressor work
Increases the turbine work
Increases the thermal efficiency
Decreases the thermal efficiency

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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)/2
p₁/p₂
(p₁ - p₂)/2

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Compressors, Gas Turbines and Jet Engines
The ratio of specific weight/h.p. of gas turbine and I.C engines may be typically of the order of

0.084027777777778
0.16736111111111
0.042361111111111
0.045833333333333

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