Furnace Technology
The electric furnace in which heat is produced by a combination of induced current and skin effect is called __________ furnace.

Low frequency induction
High frequency induction
Arc
Resistance

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Furnace Technology
Which is not accomplished in an underfired furnace?

Increase in heating capacity/m² of floor space
Reduction in the temperature of furnace gases
Elimination of cold spot at the bottom of the charge
Portection of the periphery of the charge from excessive radiation

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Furnace Technology
In a furnace, the heat taken by the charge/stock and the heat lost to the furnace structure & flue gases depends on the

All of these
Rate of firing and emissivity of flame
Nature of process ; whether batch, continuous or intermittant
Thermal conductivity of the charge & structural materials of furnace

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