Pick out the wrong statement ?

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

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

C. Mild steel sheet cannot be spot welded

D. te thickness to be welded)

E. ding

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

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