The air pressure at the fuel bed is reduced below that of atmosphere by means of a fan placed at or near the bottom of the chimney to produce a draught. Such a draught is called

A)
forced draught
B)
induced draught
C)
natural draught
D)
balanced draught

Correct Answer : Option (B) :   induced draught

Recently Updated in Steam Boilers and Engines Questions
In forced circulation steam boilers, the force is applied
A)
to circulate water
B)
to draw water
C)
to drain off the water
D)
All of the above

Correct Answer :   to circulate water

The amount of water evaporated in kg per kg of fuel burnt is called
A)
boiler efficiency
B)
equivalent evaporation from and at 100° C
C)
evaporative capacity of a boiler
D)
None of the above

Correct Answer :   evaporative capacity of a boiler

The ratio of the actual vacuum to the ideal vacuum in a condenser is called
A)
nozzle efficiency
B)
boiler efficiency
C)
vacuum efficiency
D)
condenser efficiency

Correct Answer :   vacuum efficiency

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