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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

Stop valve
Superheater
Fusible plug
Blow off cock

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Steam Boilers, Engines, Nozzles and Turbines
Tertiary air is the air used to

Transport and dry the coal
Cool the scanners
Convert CO (formed in lower zone of furnace) into CO₂ at higher zone
Provide air around burners for obtaining optimum combustion

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Steam Boilers, Engines, Nozzles and Turbines
Parson's turbine is a

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

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Steam Boilers, Engines, Nozzles and Turbines
In an impulse turbine, steam expands

Wholly in nozzle
Partly in the nozzle and partly in blades
None of these
Wholly in blades

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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.

Same as
4 times
2 times
8 times

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Steam Boilers, Engines, Nozzles and Turbines
Lancashire boiler is

Internally fired boiler
All of these
Stationary fire tube boiler
Horizontal boiler

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