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Compressors, Gas Turbines and Jet Engines

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/(W₁ + W₂)
(W₁ + W₂)/W₁
(W₁ + W₂)/W₂

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Compressors, Gas Turbines and Jet Engines
The air entry velocity m a rocket as compared to aircraft is

More
Zero
Same
Less

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

Air motor
I.C engine
Compressor
Gas turbine

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Compressors, Gas Turbines and Jet Engines
A compressor at high altitudes will require ___ power.

Less
Same
More
None of the listed here

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Compressors, Gas Turbines and Jet Engines
The compression ratio for the compressor is always _________ unity.

Less than
None of these
Equal to
More than

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Compressors, Gas Turbines and Jet Engines
The criterion of the thermodynamic efficiency for rotary compressor is

Isentropic compression
None of the listed here
Polytropic compression
Isothermal compression

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