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Compressors, Gas Turbines and Jet Engines

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

Roots blower
Reciprocating compressor
Radial flow compressor
Axial flow compressor

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Compressors, Gas Turbines and Jet Engines
The thermodynamic efficiency of rotary compressor is based on

Polytropic compression
Adiabatic compression
Isothermal compression
Isentropic compression

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Compressors, Gas Turbines and Jet Engines
A centrifugal compressor works on the principle of

Generating pressure directly
Conversion of pressure energy into kinetic energy
Centripetal action
Conversion of kinetic energy into pressure energy

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Compressors, Gas Turbines and Jet Engines
In a reciprocating air compressor, the compression work per kg of air

Increases as clearance volume decreases
Increases as clearance volume increases
Is independent of clearance volume
Decreases as clearance volume increases

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Compressors, Gas Turbines and Jet Engines
For maximum work, the reheating should be done to an intermediate pressure of (Where p₁ = Maximum pressure, and p₂ = Minimum pressure)

p₁ p₂
(p₁ - p₂)/2
(p₁ + p₂)/2
p₁/p₂

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Compressors, Gas Turbines and Jet Engines
Which is false statement about multistage compression?

Volumetric efficiency is high
It is best suited for compression ratios around 7:1
Power consumption per unit of air delivered is low
The moisture in air is condensed in the inter-cooler

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