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Q. |
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 aluminium |
Answer» D. copper and aluminium | |
Explanation: 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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