Workshop Technology
Which of the following welding method uses a pool of molten metal?

Submerged arc welding
TIG arc welding
MIG arc welding
Carbon arc welding

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Workshop Technology
Swab is used for

Smoothing and cleaning out depressions in the mould
Cleaning the moulding sand
Reinforcement of sand in the top part of the moulding box
Moistening the sand around the edge before removing pattern

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