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| Q.13 | When a pattern is to be withdrawn from the mould, it is first shaken, by striking over it from side to side, so that its surface may be free of the adjoining sand wall of the mould. That causes the size of the mould cavity increases a little and a negative allowance is to be provided in the pattern to compensate the same, is known as: | |
| Ans | 1. Shrinkage allowance | |
| 2. Rapping allowance | ||
| 3. Machining allowance | ||
| 4. Draft allowance |
Correct Ans: 2
