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Steam Boilers, Engines, Nozzles and Turbines

Steam Boilers, Engines, Nozzles and Turbines
The capacity of induced draft fan compared to forced draft fan in a boiler is

Same
More
Less or more depending on size of boiler
Less

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Steam Boilers, Engines, Nozzles and Turbines
With increase in load, radiant superheater has

Linear characteristic
Rising characteristic
Drooping characteristic
Flat characteristic

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Steam Boilers, Engines, Nozzles and Turbines
The artificial draught is produced by

Both (A) and (B)
Centrifugal fan
Chimney
Steam jet

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Steam Boilers, Engines, Nozzles and Turbines
When the cross-section of a nozzle __________ continuously from entrance to exit, it is called a convergent nozzle.

Increases
Decreases
Remain same
None of these

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Steam Boilers, Engines, Nozzles and Turbines
The cylindrical shell of a Lancashire boiler has diameter from

1.75 to 2.75 m
1.5 to 2.5 m
1.25 to 2.25 m
1 to 2 m

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Steam Boilers, Engines, Nozzles and Turbines
When the circulation of water, in a boiler, is by convection currents which are set up during the heating of water, then the boiler is known as

Forced circulation boiler
Natural circulation boiler
Internally fired boiler
Externally fired boiler

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