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Compressors, Gas Turbines and Jet Engines

Compressors, Gas Turbines and Jet Engines
For supplying intermittent small quantity of air at high pressure, following compressor is best suited

Screw
Centrifugal
Reciprocating
Axial

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Compressors, Gas Turbines and Jet Engines
The indicated work per unit mass of air delivered is

Not affected by clearance volume
Greatly affected by clearance volume
Inversely proportional to clearance volume
Directly proportional to clearance volume

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Compressors, Gas Turbines and Jet Engines
Rotary compressors are suitable for

Low discharge at low pressure
Large discharge at low pressure
Large discharge at high pressure
Low discharge at high pressure

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Compressors, Gas Turbines and Jet Engines
The efficiency and work ratio of a gas turbine plant can be increased by

All of these
Adding heat exchanger
Reheating the air after partial expansion in the turbine
Injecting water in/around combustion chamber

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Compressors, Gas Turbines and Jet Engines
For perfect intercooling in a three stage compressor

p₁ p₃ = p₂ p₄
p₂/p₁ = p₃/p₂ = p₄/p₃
p₃/p₁ = p₄/p₂
p₁ p₂ = p₃ p₄

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Compressors, Gas Turbines and Jet Engines
Mechanical efficiency of gas turbines as compared to I.C engines is

Same
Higher
None of these
Lower

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MORE MCQ ON Compressors, Gas Turbines and Jet Engines

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