MCQOPTIONS
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| 1. |
To avoid difficulties in making of molds, sand should be cooled below what temperature? |
| A. | 100°F |
| B. | 120°F |
| C. | 140°F |
| D. | 160°F |
| Answer» B. 120¬¨¬®‚Äö√†√ªF | |