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Steam Boilers, Engines, Nozzles and Turbines

Steam Boilers, Engines, Nozzles and Turbines
A device used in a boiler to control the flow of steam from the boiler to the main pipe and to shut off the steam completely when required, is known as

Superheater
Fusible plug
Stop valve
Blow off cock

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Steam Boilers, Engines, Nozzles and Turbines
The selection of type and size of a steam boiler depends upon

The fuel and water available
The geographical position of the power house
All of these
The power required and working pressure

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Steam Boilers, Engines, Nozzles and Turbines
De-Laval turbine is a

Impulse-reaction turbine
Simple impulse turbine
None of these
Simple reaction turbine

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Steam Boilers, Engines, Nozzles and Turbines
The state of vapor under saturation condition is described by

Pressure and dryness fraction
Pressure alone
Pressure and temperature
Temperature alone

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Steam Boilers, Engines, Nozzles and Turbines
Film boiling occurs at

Very high pressures
Medium pressures
Very low pressure
Atmospheric pressures

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Steam Boilers, Engines, Nozzles and Turbines
The ratio of total useful heat drop to the total isentropic heat drop, is called

Stage efficiency
Internal efficiency
Rankine efficiency
None of these

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