MCQOPTIONS
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MCQOPTIONS
| 1. |
_The effective size of sand particles used in slow sand filters is$? |
| A. | 0.25 to 0.35 mm |
| B. | 0.35 to 0.60 mm |
| C. | 0.60 to 1.00 mm |
| D. | 1.00 to 1.80 mm |
| Answer» B. 0.35 to 0.60 mm | |