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

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

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Workshop Technology
Sand wash is a casting defect which

Results in general enlargement of the casting
Occurs as sand patches on the upper surface of a casting
Results in a mismatching of the top and bottom parts of a casting
Occurs near the ingates as rough lumps on the surface of a casting

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