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Steam Boilers, Engines, Nozzles and Turbines

Steam Boilers, Engines, Nozzles and Turbines
The number of flue tubes in Lancashire boiler is

Four
Two
One
Zero

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Steam Boilers, Engines, Nozzles and Turbines
The relative heat absorption for successively added equal areas of boiler convection heating surfaces

First increases and then decreases
Decreases
Increases
Remain unaffected

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Steam Boilers, Engines, Nozzles and Turbines
A steam nozzle converts

Heat energy of steam into potential energy
Potential energy into heat energy of steam
Kinetic energy into heat energy of steam
Heat energy of steam into kinetic energy

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Steam Boilers, Engines, Nozzles and Turbines
The draught produced by a steam jet issuing from a nozzle placed in the ash-pit under the fire grate of the furnace is called

Forced steam jet draught
Induced steam jet draught
None of these
Chimney draught

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Steam Boilers, Engines, Nozzles and Turbines
The chimney draught varies with

Temperature of furnace gases
Height of chimney
All of these
Climatic conditions

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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
Stop valve
Superheater
Fusible plug

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