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Compressors, Gas Turbines and Jet Engines

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

Constant speed unloader
Relief valve
Start-stop motor
Variable speed

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Compressors, Gas Turbines and Jet Engines
The degree of reaction of an axial flow turbine is the ratio of isentropic temperature drop in a blade row to the

Total temperature drop
Adiabatic temperature drop in the stage
Total adiabatic temperature drop
Total temperature drop in the stage

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Compressors, Gas Turbines and Jet Engines
In open cycle turbojet engines used in military aircraft, reheating the exhaust gas from the turbine by burning, more fuel is used to increase the

Both (A) and (B)
None of these
Efficiency of the engine
Thrust and range of aircraft

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Compressors, Gas Turbines and Jet Engines
In a single acting reciprocating air compressor, without clearance, the compression of air may be

Polytropic
Isothermal
Isentropic
Any one of these

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Compressors, Gas Turbines and Jet Engines
The indicated work per unit mass of air delivered is

Directly proportional to clearance volume
Inversely proportional to clearance volume
Not affected by clearance volume
Greatly affected by clearance volume

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

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

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