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Compressors, Gas Turbines and Jet Engines

Compressors, Gas Turbines and Jet Engines
When the outlet angle from the rotor of a centrifugal compressor is more than 90°, then the blades are said to be

Radial
Backward curved
None of the listed here
Forward curved

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Compressors, Gas Turbines and Jet Engines
Actual compression curve is

Better than isothermal and adiabatic
In between isothermal and adiabatic
Same as isothermal
Same as adiabatic

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

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

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

Does not change
Increases
None of these
Decreases

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Compressors, Gas Turbines and Jet Engines
Volumetric efficiency of a compressor decreases with ________ in compression ratio.

Remain same
Decrease
Increase
Does not change

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Compressors, Gas Turbines and Jet Engines
The indicated work per unit mass of air delivered is

Not affected by clearance volume
Directly proportional to clearance volume
Greatly affected by clearance volume
Inversely proportional to clearance volume

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