Furnace Technology
The heating capacity of continuous reheating furnace depends upon the

Emissivity of the stock
Hearth area and furnace temperature
Ratio of wall surface to stock surface
All of these

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Furnace Technology
In a furnace employing forced draught as compared to induced draught,

None of these
Positive pressure exists in the furnace
Air is sucked in, so air leaks are more and hence the furnace efficiency is reduced
The fan operates hot and hence blades are liable to corrosion and erosion

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