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Compressors, Gas Turbines and Jet Engines

Compressors, Gas Turbines and Jet Engines
The most efficient method of compressing air is to compress it

Isentropically
Isothermally
Isochronically
Adiabatically

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Compressors, Gas Turbines and Jet Engines
The main purpose of reheating in gas turbine is to

Reduce turbine size
Increase speed
Increase temperature
Increase power output

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

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

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Compressors, Gas Turbines and Jet Engines
After-cooler is used to

Cool the air
Reduce volume
Cause moisture and oil vapour to drop out
Decrease the delivery temperature for ease in handling

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Compressors, Gas Turbines and Jet Engines
Ratio of indicated H.P. and brake H.P. is known as

Adiabatic efficiency
Volumetric efficiency
Mechanical efficiency
Isothermal efficiency

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Compressors, Gas Turbines and Jet Engines
The propulsive power of the rocket is (where v₁ = Jet velocity, and v₂ = Aircraft velocity)

(v₁² -v₂²)/2g
(v₁ - v₂)²/g
(v₁ - v₂)²/2g
(v₁² -v₂²)/g

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MORE MCQ ON Compressors, Gas Turbines and Jet Engines

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