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Pick out the wrong statement. | |
A. | Seam welding, projection welding & spot welding are the classification of electrical resistance welding. [Wrong Answer] |
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) [Wrong Answer] |
C. | In spot welding, two pieces to be joined are overlapped and placed between two electrodes. [Wrong Answer] |
D. | Mild steel sheet can not be spot welded. [Correct Answer] |