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FURNACE TECHNOLOGY

Furnace Technology
Overfire burning in a furnace is a phenomenon characterised by

None of these
Supply of excess air
Supply of excess fuel
Burning carbon monoxide and other incombustible in upper zone of furnace by supplying more air

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Furnace Technology
Which of the following variables does not affect the furnace capacity?

Gas velocity in furnace
None of these
Size of the furnace
Ratio of wall surface to surface of stock

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Furnace Technology
__________ is an indirectly heated furnace.

Muffle furnace
Soaking pit
Reheating furnace
Open hearth furnace

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Furnace Technology
Reducing atmosphere is maintained in a

Blast furnace
Calcination kiln
Soaking pit
L.D. converter

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Furnace Technology
Thermal efficiency of a limestone calcination rotary kiln may be around __________ percent.

80
65
20
40

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