MCQOPTIONS
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MCQOPTIONS
| 1. |
In a rapid sand filter, the filter head varies from |
| A. | 1 to 1.5 m |
| B. | 1.5 to 2 m |
| C. | 2 to 4 m |
| D. | 4 to 5 m |
| Answer» D. 4 to 5 m | |