Workshop Technology
The machining allowance provided on patterns depends upon

Type of casting metal
All of these
Method of casting used
Size and shape of casting

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Workshop Technology
Sand wash is a casting defect which

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

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