Discussion
Seam-welding is.........
Answer: B
Seam welding is a continuous spot welding process.
Instead of stick-shaped electrodes, seam welding uses two rotating copper wheels. The sheets pass between them while current is applied in pulses, producing a row of overlapping spot welds that forms a continuous, leak-tight seam. It is used for fuel tanks, drums and similar containers.
Making several spots at once is projection welding, and welding mesh is done by cross-wire (projection) welding. Cylindrical objects can be seam welded, but that is a use, not what seam welding is.
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