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Compressors, Gas Turbines and Jet Engines

Compressors, Gas Turbines and Jet Engines
The ratio of isentropic work to Euler’s work is known as

Compressor efficiency
Pressure coefficient
Isentropic efficiency
Euler

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Compressors, Gas Turbines and Jet Engines
Gas turbine works on

Carnot cycle
Ericsson cycle
Brayton or Atkinson cycle
Rankine cycle

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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
Degree of reaction
Slip factor

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Compressors, Gas Turbines and Jet Engines
The efficiency of the vane blower is (where W₁ = Workdone due to compression, and W₂ = Workdone due to back flow)

(W₁ + W₂)/W₁
W₁/(W₁ + W₂)
(W₁ + W₂)/W₂
W₂/(W₁ + W₂)

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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

Forward curved
Backward curved
None of the listed here
Radial

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Compressors, Gas Turbines and Jet Engines
The following property is most important for material used for gas turbine blade

Fatigue
Creep
Toughness
Corrosion resistance

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