Manufacturing And Production Technology
What type of fusion welding process is used for welding sheet metals of all engineering metals (except Cu, Ag) in automobile and air craft industries, pipe and tubing production?

Electroslag welding
Submerged arc Welding
Resistance welding
Thermit welding

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Manufacturing And Production Technology
The facing is an operation of

Beveling the extreme end of a workpiece
Machining the ends of a workpiece to produce a flat surface square with the axis
Embossing a diamond shaped pattern on the surface of a workpiece
Reducing the diameter of a workpiece over a very narrow surface

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