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The time of settlement of the finest particle of soil sample is 15hr20min49sec. calculate the height of the water tank. Take D=0.01 mm, γ=0.905D2.

(a) 5 m

(b) 7 m

(c) 12 m

(d) 4 m

The question was asked in an internship interview.

My doubt stems from Particle Size Distribution Curve topic in division Index Properties Determination of Geotechnical Engineering I

1 Answer

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Best answer
Right choice is (a) 5 m

Best explanation: γ=0.905(0.01)

                  γ=9.05×10^-5

                   t = 15hr 20min 49sec =55429 sec

                   t=h/v

                   55429=h/9.05×10^-5

                   h=55429×9.05×10^-5

                   h = 5.000034 m.

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