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Compressors, Gas Turbines and Jet Engines

Compressors, Gas Turbines and Jet Engines
The net work input required for compressor with increase in clearance volume

Increases/decreases depending on compressor capacity
Increases
Remains same
Decreases

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Compressors, Gas Turbines and Jet Engines
Separators are generally used in air compressor installations

After the inter-cooler
Before first stage suction
Between the after-cooler and receiver
Before the inter-cooler

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Compressors, Gas Turbines and Jet Engines
The pressure and temperature conditions of air at the suction of compressor are

Atmospheric
Slightly more than atmospheric
Slightly less than atmospheric
Pressure slightly less than atmospheric and temperature slightly more than atmospheric

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Compressors, Gas Turbines and Jet Engines
Ram compression in turbojet involves

Reduction of speed of incoming air and conversion of part of it into pressure energy
Increasing speed of incoming air
Compression of inlet air
Lost work

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

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

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

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MORE MCQ ON Compressors, Gas Turbines and Jet Engines

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