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Steam Boilers, Engines, Nozzles and Turbines

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

Pressure only
Pressure and dryness fraction
Dryness fraction only
Temperature only

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Steam Boilers, Engines, Nozzles and Turbines
The density of supersaturated steam is about __________ that of the ordinary saturated vapor at the corresponding pressure.

4 times
Same as
2 times
8 times

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Steam Boilers, Engines, Nozzles and Turbines
Water at pressure of 4 kg/cm² and 160°C temperature when exposed to atmosphere will

Remain as it was
Flash i.e. get converted into steam
Cool down
Boil

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Steam Boilers, Engines, Nozzles and Turbines
The value of the reheat factor varies from

1.08 to 1.10
1.2 to 1.6
1.6 to 2
1.02 to 1.06

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Steam Boilers, Engines, Nozzles and Turbines
Reheating of steam in a turbine

Reduces wear on the blades
Increases the work-done through the turbine
Increases the efficiency of the turbine
All of these

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Steam Boilers, Engines, Nozzles and Turbines
Expanding steam to a very low pressure (high vacuum) in steam engines is

Uneconomical
Economical
Essential
Desirable

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MORE MCQ ON Steam Boilers, Engines, Nozzles and Turbines

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