Workshop Technology
Thermit, used in Thermit welding, is a mixture of

Charcoal, iron oxide and aluminium
Iron oxide and aluminium
Charcoal and iron oxide
Charcoal and aluminium

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Workshop Technology
Shift is a casting defect which

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
Occurs as sand patches on the upper surface of a casting
Results in general enlargement of a casting

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