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FURNACE TECHNOLOGY

Furnace Technology
Heat transfer rate to the stock/charge in the furnace does not depend upon the

Size of the furance
Use of waste heat recovery equipments
Emissivity of the refactory walls
Thickness of the stock

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Furnace Technology
Heat transfer rate to the charge/stock in a furnace does not depend upon the

Flue gas temperature
Initial temperature of the charged stock
Type of fuels viz solid, liquid or gaseous
Emissivity of refractory walls

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Furnace Technology
Which of the following is not an additive for flue gases from furnace to reduce its dew-point?

Fine dolomite
None of these
Ammonia
Alkaline powders

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Furnace Technology
In low or standard frequency induction furnace, heat is produced by the

Current flow through a heating element
Combination of induced current and skin effect
None of these
Induction and resistance

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Furnace Technology
Combustion of furnace oil in a furnace (soaking pit) with preheated combustion air at 400°C results in saving of about __________ percent furnace oil as compared to its combustion with atmospheric air, if the flue gas outlet temperature from the soaking pit is 1200°C.

40
5
20
60

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