Ingress of cold air in the furnaces through cracks, charging doors, openings etc.
A. Reduces the flue gas temperature and makes the furnace atmosphere oxidising
B. Increases the load on the induced draft fan
C. Reduces the furnace draught
D. All of the above
Answer: Option D
This Question Belongs to Chemical Engineering >> Furnace Technology
Overfire burning in a furnace is a phenomenon characterised by
A. Supply of excess fuel
B. Supply of excess air
C. Burning carbon monoxide and other incombustible in upper zone of furnace by supplying more air
D. None of these
Which of the following variables does not affect the furnace capacity?
A. Size of the furnace
B. Gas velocity in furnace
C. Ratio of wall surface to surface of stock
D. None of these
__________ is an indirectly heated furnace.
A. Open hearth furnace
B. Muffle furnace
C. Soaking pit
D. Reheating furnace
Reducing atmosphere is maintained in a
A. Calcination kiln
B. Blast furnace
C. Soaking pit
D. L.D. converter
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