engineering recuitment DDA JE Civil 2023 Mock Test Environmental Engineering Water Treatment Filtration
The effective size of sand particles used in slow sand filters is
1
0.25 to 0.35 mm
2
0.35 to 0.50 mm
3
0.50 to 0.75 mm
4
0.75 to 1.10 mm
The effective size of sand particles used in slow sand filters is