In a furnace, the heat taken by the charge/stock and the heat lost to the furnace structure & flue gases depends on the
A. Rate of firing and emissivity of flame
B. Thermal conductivity of the charge & structural materials of furnace
C. Nature of process ; whether batch, continuous or intermittant
D. All of the above
Answer: Option D
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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