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Compressors, Gas Turbines and Jet Engines

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

Pressure coefficient
Polytropic reaction
Slip factor
Work coefficient

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

Fatigue
Toughness
Corrosion resistance
Creep

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Compressors, Gas Turbines and Jet Engines
The volume of air delivered in a medium capacity air compressor per unit time is

Above 5 m³/s
None of these
0.1 to 1.2 m³/s
0.15 to 5 m³/s

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Compressors, Gas Turbines and Jet Engines
In a compressor, free air delivered is the actual volume delivered at the stated pressure reduced to

N.T.P. conditions
20°C and 1 kg/cm²
Intake temperature and pressure conditions
0°C and 1 kg/cm²

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Compressors, Gas Turbines and Jet Engines
As the turbine inlet temperature increases, the thermal efficiency of gas turbine for the optimum pressure ratio

Decreases
Remain same
First increases and then decreases
Increases

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Compressors, Gas Turbines and Jet Engines
Work ratio of a gas turbine plant is ratio of

Work done by turbine and heat supplied
Work done by turbine and net work output
Net work output and heat supplied
Net work output and work done by turbine

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