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Compressors, Gas Turbines and Jet Engines

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

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

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Compressors, Gas Turbines and Jet Engines
Pressure ratio in gas turbines is the ratio of

Inlet pressure to exhaust pressure
Pressures across the turbine
Highest pressure to exhaust pressure
Compressor pressure ratio

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Compressors, Gas Turbines and Jet Engines
High air-fuel ratio in gas turbines

Reduces exhaust temperature
Improves thermal efficiency
Do not damage turbine blades
Increases power output

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Compressors, Gas Turbines and Jet Engines
Rotary compressor is best suited for

Large quantity of air at high pressure
Large quantity of air at low pressure
Small quantity of air at high pressure
Small quantity of air at low pressure

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

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

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Compressors, Gas Turbines and Jet Engines
The pressure ratio of an ideal vaned compressor with increase in mass flow rate

Remain constant
Decreases
Increases
First decreases and then increases

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MORE MCQ ON Compressors, Gas Turbines and Jet Engines

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