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Furnace Technology

Furnace Technology
An improved and fuel efficient version of the pusher type reheating furnace is the __________ furnace.

Walking beam
Shaft
Rotary hearth
Tunnel

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Furnace Technology
Fuel used in B.F. stove is

Furnace oil
Pulverised coal
Coke oven gas
Blast furnace gas/mixed gas

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Furnace Technology
In furnaces operating at very high temperature (say) 1250°C, e.g. soaking pit), the maximum heat transfer takes place by

Conduction
Radiation
Convection
Can not be predicted

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Furnace Technology
In a furnace operation, which is not preheated?

Neither A nor B
Solid fuels
Both A and B
Hydrocarbon containing fuel gases (e.g. coke oven gas, refinery gas etc.)

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Furnace Technology
Ceramic recuperators compared to metallic recuperators for the same duty

Occupy more space
Are lighter
Are less costly
Have higher pressure differential between flue gas & air side

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Furnace Technology
In order to maintain an oxidising atmosphere in a furnace, it should have

Less of excess air
More of CO₂ in flue gas
More of CO in flue gas
More of excess air

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