Question
Match the following sand mold casting defects with their respective causes.
| Defect | Cause | ||
| P | Blow hole | 1 | Poor collapsibility |
| Q | Misrun | 2 | Mold erosion |
| R | Hot tearing | 3 | Poor permeability |
| S | Wash | 4 | Insufficient fluidity |
Options :
P-4, Q-3,R-1,S-2
P-3,Q-4, R-2, S-1
P-2, Q-4,R-1,S-3
P-3, Q-4,R-1, S-2
Answer :
P-3, Q-4,R-1, S-2
Solution :
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