Question

Cold shut is a defect in casting due to

• A. discontinuity resulting from hundred contraction
• B. sand sliding from the cope surface
• C. internal voids or surface depression due to excessive gas trapped
• D. two streams of material that are too cold to fuse properly

Answer 1

The correct option is D two streams of material that are too cold to fuse properly

Cold shut is a casting defect when two metal streams freezes before meeting and fusing properly. It can be prevented by assuming sufficient superheat in the poured metal and thick enough wall is casting design.