Workshop Technology
Green sand is a mixture of

70% sand and 30% clay
30% sand and 70% clay
90% sand and 10% clay
50% sand and 50% clay

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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
Results in general enlargement of the casting
Occurs as sand patches on the upper surface of a casting
Occurs near the ingates as rough lumps on the surface of a casting

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