Q. The effective size of sand particles for rapid 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
- b. 0.35 to 0.50 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