# Three soil specimens (Soil 1, Soil 2 and Soil 3), each $150 \mathrm{~mm}$ long and $100 \mathrm{~mm}$ diameter, are placed in series in a constant head flow set-up as shown in the figure. Suitable screens are provided at the boundaries of the specimens to keep them intact. The values of coefficient of permeability of Soil $1,$ Soil 2 and Soil 3 are 0.01,0.003 and $0.03 \mathrm{~cm} / \mathrm{s}$ respectively. The value of $h$ in the set-up is (A) $0 \mathrm{~mm}$ (B) $40 \mathrm{~mm}$ (C) $255 \mathrm{~mm}$ (D) $560 \mathrm{~mm}$

## Question ID - 156666 | Toppr Answer Three soil specimens (Soil 1, Soil 2 and Soil 3), each $150 \mathrm{~mm}$ long and $100 \mathrm{~mm}$ diameter, are placed in series in a constant head flow set-up as shown in the figure. Suitable screens are provided at the boundaries of the specimens to keep them intact. The values of coefficient of permeability of Soil $1,$ Soil 2 and Soil 3 are 0.01,0.003 and $0.03 \mathrm{~cm} / \mathrm{s}$ respectively. The value of $h$ in the set-up is (A) $0 \mathrm{~mm}$ (B) $40 \mathrm{~mm}$ (C) $255 \mathrm{~mm}$ (D) $560 \mathrm{~mm}$

$40 \mathrm{~mm}$