Electrodes used in spot welding are made up of which material?(a) Only Copper(b) Copper and tungsten(c) Copper and chromium(d) Copper and aluminiumI got this question in an interview for job.The question is from Resistance Welding Methods topic in division Welding and Related Processes of Casting-Forming-Welding II

Electrodes used in spot welding are made up of which material?(a) Only

1.	Electrodes used in spot welding are made up of which material?(a) Only Copper(b) Copper and tungsten(c) Copper and chromium(d) Copper and aluminiumI got this question in an interview for job.The question is from Resistance Welding Methods topic in division Welding and Related Processes of Casting-Forming-Welding II
Answer» Correct option is (d) Copper and aluminium To ELABORATE: The electrodes that are employed in the spot welding are REQUIRED to possess a high AMOUNT of electrical and THERMAL conductivity. Hence, they are primarily made up of copper or copper and tungsten or copper and chromium.

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