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Furnace Technology

Furnace Technology
Which of the following is a periodic furnace?

Reheating furnace
Soaking pit
Tunnel kiln
Rotary kiln

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Furnace Technology
The resistance furnace produces heat by the

None of these
Flow of current through a heating element
Combination of induced current and skin effect
Electric arc struck between electrodes and the charge

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Furnace Technology
A refractory wall separating the stock and the source of heat is provided in a

Updraft kiln
Muffle furnace
None of these
Continuous furnace

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Furnace Technology
In a muffle furnace, the muffle

Permits the use of controlled atmosphere for the protection of stock
Assists in temperature equalisation in the charge
Retards the heat transfer
All of these

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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
Induction and resistance
None of these

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Furnace Technology
Fuel economy in an industrial furnace operation can not be achieved by the use of

Combustion air not enriched with oxygen
Stoichiometric combustion air
Recupterators
Non-preheated combustion air

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