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Compressors, Gas Turbines and Jet Engines

Compressors, Gas Turbines and Jet Engines
In a high pressure compressor, the delivery pressure is

5 to 8 bar
1 to 5 bar
10 to 15 bar
8 to 10 bar

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Compressors, Gas Turbines and Jet Engines
The main purpose of reheating in gas turbine is to

Increase power output
Increase temperature
Reduce turbine size
Increase speed

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Compressors, Gas Turbines and Jet Engines
Aeroplanes employ following type of compressor

Axial flow
Centrifugal
None of these
Radial flow

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Compressors, Gas Turbines and Jet Engines
The efficiency of the vane blower is (where W₁ = Workdone due to compression, and W₂ = Workdone due to back flow)

W₂/(W₁ + W₂)
(W₁ + W₂)/W₁
W₁/(W₁ + W₂)
(W₁ + W₂)/W₂

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Compressors, Gas Turbines and Jet Engines
If infinite number of heaters be used in a gas turbine, then expansion process in turbine approaches

Isothermal
Isochoric
Isentropic
Adiabatic

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Compressors, Gas Turbines and Jet Engines
Actual compression curve is

Same as adiabatic
Same as isothermal
In between isothermal and adiabatic
Better than isothermal and adiabatic

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