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Steam Boilers, Engines, Nozzles and Turbines

Steam Boilers, Engines, Nozzles and Turbines
A wet vapor can be completely specified by

Dryness fraction only
Temperature only
Pressure only
Pressure and dryness fraction

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

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

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Steam Boilers, Engines, Nozzles and Turbines
The critical pressure at which latent heat of vaporisation is zero is

100 kgf/ cm²
225.65 kgf/ cm²
1 kgf/ cm²
273 kgf/ cm²

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Steam Boilers, Engines, Nozzles and Turbines
Hard coke is used in

Cement industry
Domestic use
Blast furnace
Thermal power plant

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Steam Boilers, Engines, Nozzles and Turbines
Natural water circulation, by convection in water tube boilers, with increase in pressure of boiler

First increases and then decreases
Decreases
Remain unaffected
Increases

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Steam Boilers, Engines, Nozzles and Turbines
The heat balance sheet for the boiler shows the

All of these
Steam formed by combustion of hydrogen per kg of fuel
Moisture present in the fuel
Complete account of heat supplied by 1 kg of dry fuel and the heat consumed

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