Workshop Technology
The welding process used to join the ends of two pipes of uniform cross-section, is

Upset butt welding
Projection welding
Spot welding
Seam welding

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Workshop Technology
In a compound die

Only one operation is performed at each stroke of the ram
Two or more cutting operations are performed at one station of the press in every stroke of the ram
Two or more operations are performed simultaneously at the single stroke of the ram
Both cutting and non-cutting operations are performed at one station of the press in every stroke of the ram

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