Q. The effective size of sand particles for slow sand filters varies from (Solved)
1. 0.30 to 0.35 mm
2. 0.35 to 0.50 mm
3. 0.50 to 0.65 mm
4. 0.65 to 0.75 mm
- a. 0.30 to 0.35 mm
1. 0.30 to 0.35 mm
2. 0.35 to 0.50 mm
3. 0.50 to 0.65 mm
4. 0.65 to 0.75 mm