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Compressors, Gas Turbines and Jet Engines

Compressors, Gas Turbines and Jet Engines
Pick up wrong statement. Surging phenomenon in centrifugal compressor depends on

Pressure ratio
Change in load
Stagnation pressure at the outlet
Mass flow rate

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Compressors, Gas Turbines and Jet Engines
Losses in a centrifugal compressor are due to

Diffuser losses
Impeller channel losses
All of the listed here
Inlet losses

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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)

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

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

Radial flow
Centrifugal
None of these
Axial flow

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Compressors, Gas Turbines and Jet Engines
A compressor mostly used for supercharging of I.C. engines is

Axial flow compressor
Radial flow compressor
Roots blower
Reciprocating compressor

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Compressors, Gas Turbines and Jet Engines
If the flow of air through the compressor is parallel to its axis, then the compressor is

Centrifugal compressor
Turbo compressor
Axial flow compressor
Reciprocating compressor

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