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Compressors, Gas Turbines and Jet Engines

Compressors, Gas Turbines and Jet Engines
In an axial flow compressor, the ratio of pressure in the rotor blades to the pressure rise in the compressor in one stage is known as

Pressure coefficient
Work factor
Slip factor
Degree of reaction

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Compressors, Gas Turbines and Jet Engines
The air-fuel ratio in gas turbines is of the order of

50: 1.
7: 1
30: 1
15: 1

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

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

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Compressors, Gas Turbines and Jet Engines
Efficiency of gas turbine is increased by

Inter cooling
Adding a regenerator
Reheating
All of the listed here

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Compressors, Gas Turbines and Jet Engines
If the clearance ratio for a reciprocating air compressor is 'K', then its volumetric efficiency is given by

1 - k + k (p₁/p₂) n- 1/n
1 + k - k (p₂/p₁)1/n
1 - k + k (p₁/p₂)1/n
1 + k - k (p₂/p₁) n-1/n

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Compressors, Gas Turbines and Jet Engines
In multistage compressor, the isothermal compression is achieved by

Employing inter-cooler
By running compressor at very slow speed
By constantly cooling the cylinder
By insulating the cylinder

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MORE MCQ ON Compressors, Gas Turbines and Jet Engines

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