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Compressors, Gas Turbines and Jet Engines

Compressors, Gas Turbines and Jet Engines
A jet engine works on the principle of conservation of

Linear momentum
Flow
Energy
Mass

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Compressors, Gas Turbines and Jet Engines
In a centrifugal compressor, the ratio of the ________ to the blade velocity is called slip factor.

Inlet velocity of flow
Outlet whirl velocity
Outlet velocity of flow
Inlet whirl velocity

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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
In jet engines, paraffin is usually used as the fuel because of its

Low freezing point
Ease of atomisation
High calorific value
Both (A) and (C) above

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Compressors, Gas Turbines and Jet Engines
To avoid moisture troubles, the compressed air main line should

Be laid vertically
Rise gradually towards the point of use
Drop gradually towards the point of use
Be laid exactly horizontally

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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)/2
(p₁ + p₂)/2
p₁/p₂
p₁ p₂

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