Pick out the wrong statement.

Question

Options:

A . Seam welding, projection welding & spot welding are the classification of electrical resistance welding

B . Electrode tip in spot welding is of copper and the tip diameter should be equal to t (where, t = plate thickness to be welded)

C . In spot welding, two pieces to be joined are overlapped and placed between two electrodes

D . Mild steel sheet can not be spot welded

Answer: Option D

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