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In the given figure of thermit welding apparatus, what does the question mark represents which part? (a)Riser

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in Casting-Forming-Welding II by (119k points)
In the given figure of thermit welding apparatus, what does the question mark represents which part?

(a) Riser

(b) Workpiece

(c) Runner

(d) Wax pattern

I had been asked this question in unit test.

My question is based upon Thermit Welding topic in division Welding and Related Processes of Casting-Forming-Welding II

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The correct choice is (d) Wax pattern

Best explanation: In this apparatus of the thermit welding process, the question mark here represents the pattern made up of wax. This process is basically carried out in fusion welding.

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