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Where does the diameter of the electrode, in rocking furnace become low?

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in Casting-Forming-Welding II by (119k points)
Where does the diameter of the electrode, in rocking furnace become low?

(a) Near cathode

(b) Near anode

(c) In the middle

(d) Between cathode and the mid

This question was addressed to me during an interview for a job.

Origin of the question is Rocking Furnace in division Metal Furnace and Practice of Casting-Forming-Welding II

1 Answer

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Best answer
Right option is (c) In the middle

Easiest explanation: The graphite electrode is designed in such a way that its diameter gets reduced at the middle of the electrode. This reduction in diameter causes a high amount of resistance in the electrode, hence generating large amount of heat.

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