Workshop Technology
In submerged arc welding, an arc is produced between a

Bare metal electrode and the work
Two tungsten electrodes and the work
Metal electrode and the work
Carbon electrode and the work

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Workshop Technology
Spot welding is used for welding

Lap joints in plates having thickness above 3 mm
Lap joints in plates having 0.025 mm to 1.25 mm thickness
Butt joints in plates having thickness above 3 mm
Butt joints in plates having 0.025 mm to 1.25 mm thickness

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Workshop Technology
In a simple die

Both cutting and non-cutting operations are performed at one station of the press in every stroke of the ram
None of the listed here
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

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