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Compressors, Gas Turbines and Jet Engines

Compressors, Gas Turbines and Jet Engines
The maximum combustion pressure in gas turbine as compared to I.C. engine is

More
Less
Same
Depends on other factors

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Compressors, Gas Turbines and Jet Engines
Reheating in multistage expansion gas turbine results in

Decrease of heat loss in exhaust
Maximum work output
High thermal efficiency
Reduction in compressor work

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

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

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Compressors, Gas Turbines and Jet Engines
A machine used to raise the pressure of air is called

I.C engine
Gas turbine
Compressor
Air motor

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Compressors, Gas Turbines and Jet Engines
If the clearance ratio for a reciprocating air compressor is 'K', then its volumetric efficiency is given by

1 - k + k (p₁/p₂) n- 1/n
1 - k + k (p₁/p₂)1/n
1 + k - k (p₂/p₁) n-1/n
1 + k - k (p₂/p₁)1/n

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Compressors, Gas Turbines and Jet Engines
The work ratio of simple gas turbine cycle depends on

Minimum cycle temperature
Pressure ratio
Maximum cycle temperature
All of these

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