Metallurgical Engineering > GATE 2025 > Casting Defects
Match the casting defects in Column I with the characteristic features in Column II.
| Column I | Column II |
| P. Misrun | 1. Penetration of liquid metal behind surface layer of sand moulds |
| Q. Expansion scab | 2. Metal solidifies prematurely in the mould and some sections of the casting are not filled |
| R. Pin holes | 3. Cracking because of restraint to contraction in certain areas of the casting during solidification and cooling to room temperature |
| S. Hot tearing | 4. Evolution of gases during solidification resulting in porosity |
Correct : d
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