MCQOPTIONS
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| 1. |
Trommels are revolving screens which normally operate in the range of __________ rpm. |
| A. | 1 - 2 |
| B. | 15 - 20 |
| C. | 40 - 50 |
| D. | 60 - 75 |
| Answer» C. 40 - 50 | |