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Compressors, Gas Turbines and Jet Engines

Compressors, Gas Turbines and Jet Engines
Pick up wrong statement. Surging phenomenon in centrifugal compressor depends on

Mass flow rate
Change in load
Stagnation pressure at the outlet
Pressure ratio

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Compressors, Gas Turbines and Jet Engines
In air breathing jet engine, the jet is formed by expanding

Liquid
Highly heated atmospheric air
Solids
Plasma

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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
p₁ p₂
(p₁ - p₂)/2

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Compressors, Gas Turbines and Jet Engines
Propulsive efficiency is defined as ratio of

Thrust power and fuel energy
Thrust power and propulsive power
Propulsive power and fuel input
Engine output and propulsive power

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Compressors, Gas Turbines and Jet Engines
Volumetric efficiency is

Reciprocal of compression ratio
The ratio of stroke volume to clearance volume
The ratio of the air actually delivered to the amount of piston displacement
Index of compressor performance

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Compressors, Gas Turbines and Jet Engines
The working fluid in a turbine is

In a single phase
In two phases
In three phases
In the form of air and water mixture

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MORE MCQ ON Compressors, Gas Turbines and Jet Engines

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