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Furnace Technology

Furnace Technology
Reheating furnace (pusher type) is used for heating

Steel coils
Ingots
Slabs
Steel sheets

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Furnace Technology
To reduce the stack loss, heat recovery from flue gas can be done by

Preheating of cold stock
Steam generation in waste heat boilers
All of these
Preheating of combustion air

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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

Convection
Can not be predicted
Radiation
Conduction

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Furnace Technology
Oxygen percentage in the flue gas coming out of a gaseous fuel fired furnace should be ideally about __________ percent.

< 8
< 5
< 2
< 10

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Furnace Technology
The thermal efficiency of an air/fuel gas preheating recuperator may be as high as __________ percent.

65
50
99
85

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Furnace Technology
In which of the waste heat recovery equipment, the flow of flue gas and air is alternately reversed after a fixed interval of time?

Recuperator
None of these
Waste heat boiler
Regenerator

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