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Steam Boilers, Engines, Nozzles and Turbines

Steam Boilers, Engines, Nozzles and Turbines
A binary vapor plant consists of

Mercury boiler
Steam turbine
All of the listed here
Steam condenser

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Steam Boilers, Engines, Nozzles and Turbines
An economiser _________ the steam raising capacity of a boiler.

Increases
Decreases
Has no effect on
None of these

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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

Blow off cock
Fusible plug
Superheater
Stop valve

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Steam Boilers, Engines, Nozzles and Turbines
The heat loss in a boiler takes place in the form of

All of these
Moisture present in fuel and steam formed by combustion of hydrogen in fuel
Heat carried away by ash
Heat carried away by flue gases

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Steam Boilers, Engines, Nozzles and Turbines
In a Parson's turbine stage, blade velocity is 320 m/s at the mean radius and rotor blade exit angle is 30°. For minimum kinetic energy of the steam leaving the stage, the steam velocity at the exit of the rotor will be

160/3 m/s
320/3 m/s
640 m/s
640/3 m/s

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Steam Boilers, Engines, Nozzles and Turbines
The effect of friction in the nozzle ___ dryness fraction of steam.

None of the listed here
Decreases
Increases
Has no effect on

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