MCQOPTIONS
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| 1. |
What is the height of the anthracite maintained in a dual media filter? |
| A. | 1.5-1.8 m |
| B. | 2.2 -2.4 m |
| C. | 2.5-2.8 m |
| D. | 2.8-3.0 m |
| Answer» B. 2.2 -2.4 m | |