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WorksheetsFINAL TERM: QUIZ No.2 - PERMEABILITY
Total questions: 11
Worksheet time: 2hrs 55mins
The hydraulic conductivity of a clayey soil is 4 x 10-7 cm/sec. The viscosity of water at 25oC is 0.0911 x 10-4
g-sec/cm2. Calculate the absolute permeability K ?
3.644 x 10-12 cm2
0.3644 x 10-12 cm2
3.644 x 10-11 cm2
3.644 x 10-11 cm2
Find the flow rate in m3/sec/m length (at right angles to the cross section shown) through the permeable soil layer shown in the figure. given H = 7 m, H1 = 2 m, h = 3 m, L = 40 m, ∝ = 7o and k = 0.07 cm/sec.
1.0344 x 10-4 m3/sec/m
1.1988 x 10-4 m3/sec/m
1.0344 x 10-3 m3/sec/m
1.1988 x 10-3 m3/sec/m
Refer to the constant-head permeability test arrangement shown in the figure. A test gives these values:
L = 18 in
A = 3.5 in2
Constant head difference , h = 28 in
Water collected in 3 min = 21.58 in3
Calculate the hydraulic conductivity in in/sec.
0.022 in/sec
0.22 in/sec
0.022 cm/sec
0.22 cm/sec
Refer to the constant-head permeability test arrangement shown in the figure. A test gives these values:
L = 18 in
A = 3.5 in2
Constant head difference , h = 28 in
Water collected in 3 min = 21.58 in3
Void ratio = 0.58
Calculate the discharge velocity in in/sec.
0.0342 in/sec
0.342 in/sec
0.0342 cm/sec
0.342 cm/sec
Refer to the constant-head permeability test arrangement shown in the figure. A test gives these values:
L = 18 in
A = 3.5 in2
Constant head difference , h = 28 in
Water collected in 3 min = 21.58 in3
Void ratio = 0.58
Calculate the seepage velocity in in/sec.
0.093 n/sec
0.93 in/sec
0.093 cm/sec
0.93 cm/sec
1.53 x 10-4 in/sec
9.16 x 10-3 in/min
0.153 x 10-4 in/sec
0.916 x 10-3 in/min
18.96 in
19.97 in
20.96 in
17.97 in
A layered soil is shown in Figure. Given that:
H1 = 1.5 m , K = 10-5 cm/sec
H2 = 2.5 m, K = 3.0 x 10-3 cm/sec
H3 = 3.0 m, K = 3.5 x 10-5 cm/sec
Calculate the equivalent horizontal hydraulic conductivity.
1.088 x 10-3 cm/sec
0.1088 x 10-3 cm/sec
10.88 x 10-3 cm/sec
108.8 x 10-3 cm/sec
A layered soil is shown in Figure. Given that:
H1 = 1.5 m , K = 10-5 cm/sec
H2 = 2.5 m, K = 3.0 x 10-3 cm/sec
H3 = 3.0 m, K = 3.5 x 10-5 cm/sec
Calculate the equivalent vertical hydraulic conductivity.
2.96 x 10-5 cm/sec
0.296 x 10-5 cm/sec
29.60 x 10-5 cm/sec
296.00 x 10-5 cm/sec
A layered soil is shown in Figure. Given that:
H1 = 1.5 m , K = 10-5 cm/sec
H2 = 2.5 m, K = 3.0 x 10-3 cm/sec
H3 = 3.0 m, K = 3.5 x 10-5 cm/sec
Estimate the ratio of equivalent hydraulic conductivity , KH(eq)/Hv(eq).
36.79
366.79
136.79
73.57
A permeable soil layer is underlain by an impervious layer as shown in figure, with K = 4.5 x 10-5 m/sec for the permeable layer, calculate the rate of seepage through it in m3/hr/m width if H = 4 m and ∝ = 10o
0.1108 m3/hr/m
0.0789 m3/hr/m
1.108 m3/hr/m
0.789 m3/hr/m
