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Compressors, Gas Turbines and Jet Engines

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

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

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

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

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Compressors, Gas Turbines and Jet Engines
Maximum work is done in compressing air when the compression is

Polytropic
None of these
Isothermal
Adiabatic

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Compressors, Gas Turbines and Jet Engines
The process, which causes the air to enter the impeller blades of a centrifugal compressor at ________ velocity (without effecting the mass of air to flow and velocity of flow) is known as prewhirl.

Reduced
Zero
Increased
None of these

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Compressors, Gas Turbines and Jet Engines
Which of the following plants is smallest and lightest for generating a given amount of power?

Gas turbine plant
Petrol engine
Solar plant
Diesel engine

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Compressors, Gas Turbines and Jet Engines
There is a certain pressure ratio (optimum) for a gas turbine at which its thermal efficiency is maximum. With increase in turbine temperature, the value of pressure ratio for the peak efficiency would

None of these
Increase
Remain same
Decrease

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