Mechanical Engineering - Workshop Technology - Discussion
Discussion Forum : Workshop Technology - Section 2 (Q.No. 45)
45.
Scab is a casting defect which occurs as sand patches on the upper surface of a casting.
Discussion:
4 comments Page 1 of 1.
S. Ata said:
8 years ago
A run out occurs when the liquid metal leaks out of the mold because of a faulty mold or flask. Scabs are a thin layer of metal that sits proud of the casting. They are easy to remove and always reveal a buckle underneath, which is an indentation in the casting surface.
(1)
Viral said:
9 years ago
No @Vijay.
The given answer is right.
The given answer is right.
Pavan said:
9 years ago
Why scab happens?
Vijay said:
9 years ago
Answer- B.
Scabs are sort of projection on the casting that occurs when a portion of the face of the mould or core lifts and metal flows underneath in a thin layer.
Scabs are sort of projection on the casting that occurs when a portion of the face of the mould or core lifts and metal flows underneath in a thin layer.
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