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Compressors, Gas Turbines and Jet Engines

Compressors, Gas Turbines and Jet Engines
In jet engines the products of combustion after passing through the gas turbine are discharged into

Vacuum
Discharge nozzle
Back to the compressor
Atmosphere

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Compressors, Gas Turbines and Jet Engines
The efficiency of roots blower ________ with the increase in pressure ratio.

Increases
Does not change
Decreases
None of these

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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)²/2g
(v₁² -v₂²)/g
(v₁ - v₂)²/g

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Compressors, Gas Turbines and Jet Engines
The following property is most important for material used for gas turbine blade

Fatigue
Creep
Toughness
Corrosion resistance

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Compressors, Gas Turbines and Jet Engines
A closed cycle gas turbine consists of a

Compressor
All of these
Heating chamber
Cooling chamber

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Compressors, Gas Turbines and Jet Engines
In a single acting reciprocating air compressor, without clearance, the compression of air may be

Isothermal
Isentropic
Any one of these
Polytropic

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MORE MCQ ON Compressors, Gas Turbines and Jet Engines

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