Workshop Technology
In arc welding, the temperature of heat produced by the electric arc is of the order of

3000°C to 4000°C
6000°C to 7000°C
5000°C to 6000°C
4000°C to 5000°C

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Workshop Technology
Sand wash is a casting defect which

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

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