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Steam Boilers, Engines, Nozzles and Turbines

Steam Boilers, Engines, Nozzles and Turbines
100% efficiency of a thermal cycle cannot be achieved because of

Frictional losses
Non availability of ideal substance
It is not possible to achieve 0°K temperature
Leakage

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Steam Boilers, Engines, Nozzles and Turbines
The effect of super-saturation is that the

Entropy and specific volume of the steam increases
Mass of the steam discharged increases
Exit velocity of steam reduces
All of these

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Steam Boilers, Engines, Nozzles and Turbines
The overall efficiency of thermal power plant is

Boiler efficiency, turbine efficiency, generator efficiency
Carnot cycle efficiency
Regenerative cycle efficiency
All the three above plus gas cycle efficiency

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Steam Boilers, Engines, Nozzles and Turbines
An economiser in a boiler

Decreases steam pressure
Increases steam flow
Increases steam pressure
Decreases fuel consumption

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Steam Boilers, Engines, Nozzles and Turbines
The length of Cornish boiler varies from

7 to 9 m
2 to 4.5 m
5 to 7.5 m
3 to 5 m

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Steam Boilers, Engines, Nozzles and Turbines
The effect of bleeding is that

All of these
It increases the thermodynamic efficiency of the turbine
It decreases the power developed by the turbine
Boiler is supplied with hot water

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MORE MCQ ON Steam Boilers, Engines, Nozzles and Turbines

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