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Compressors, Gas Turbines and Jet Engines

Compressors, Gas Turbines and Jet Engines
The degree of reaction is usually kept ________ for all types of axial flow compressors.

0.3
0.5
0.2
0.4

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Compressors, Gas Turbines and Jet Engines
The efficiency of a jet engine is higher at

High altitudes
Low speeds
Low altitudes
High speeds

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Compressors, Gas Turbines and Jet Engines
For perfect intercooling in a three stage compressor

p₁ p₂ = p₃ p₄
p₃/p₁ = p₄/p₂
p₂/p₁ = p₃/p₂ = p₄/p₃
p₁ p₃ = p₂ p₄

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Compressors, Gas Turbines and Jet Engines
Gas turbine works on

Rankine cycle
Carnot cycle
Brayton or Atkinson cycle
Ericsson cycle

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

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

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Compressors, Gas Turbines and Jet Engines
In a double acting compressor, the air is compressed

In one cylinder
In two cylinders
In two cylinders on both sides of the piston
In a single cylinder on both sides of the piston

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