MCQOPTIONS
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| 1. |
Water filtration rate in a rapid sand filter ranges from __________ kilolitres/m²/hr. |
| A. | 0.1 to 1 |
| B. | 3 to 6 |
| C. | 10 to 15 |
| D. | 15 to 20 |
| Answer» C. 10 to 15 | |