Please could you help me solve this question and if it's possible to give me step by step solution. 3. A settling tank has an overflow rate of 100,000 gal/ft²-d. Water carryingsediment of various sizes enters the tank. The sediment has the followingdistribution of settling velocities.Settling velocity (ft/min)10.05.02.01.0Mass fraction remaining0.540.450.350.200.100.030.750.50What is the gravimetric percentage of sediment particles completely removed?(A) 32%(B) 39%(C) 47%(D) 55%

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Answered: 3. A settling tank has an overflow rate…

Principles of Geotechnical Engineering (MindTap Course List)

9th Edition

ISBN:9781305970939

Author:Braja M. Das, Khaled Sobhan

Publisher:Braja M. Das, Khaled Sobhan

Chapter7: Permeability

Section: Chapter Questions

Problem 7.5P

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A glass container with pervious bottom containing fine sand in loose state (void ratio = 0.8) is subjected to hydrostatic pressure from underneath until quick condition occurs in the sand. If the specific gravity of sand particles = 2.65, area of cross-section of sand sample= 10 cm2 and height of sample = 10 cm, compute the seepage force in N acting from below. a. 9.17. b. 0.9 c. 0.45 d 7.29
A settling basin is designed with a loading rate of 25 m³ /m².day. The depth of basin is 2 m deep, Determine the overall removal obtained for a suspension for data are shown below. Time (min) 80 100 130 200 240 420 F 111 78 27 The specific gravity of the particles is 1.2 and water = 0.997, and µ= 1.027. 0 60 Concentration (ppm) 300 189 180 168 156
Problem 5. Estimate the terminal settling velocity (m/s) of a spherical particle (density 2650 kg/m') with a diameter of 0.5 mm in water. Assume the water is at 20°C (density = 998.2 kg/m', dynamic viscosity = 1.002x10* kgm's'). [Hint: to solve this problem, initially assume laminar flow and use Stoke's law to estimate the settling velocity of the particle. Then check the Reynolds number. If it is out of the laminar range, use the Stoke's law estimate and Reynolds number as your initial estimates in solving the problem iteratively using Newton's law. Perform your iterative solution with Newton's law using Excel, either “by hand," or using the iterative calculation function, and attach your spreadsheet). -3 %3D
Profile is shown in the figure A zone of capillary rise of 3.0m is on the sand layer overlaying clay. In this zone, the average degree of saturation is 70% 4m 3.0m 3.5m A Dry Sand & Capillary Zone CLAY Ground surface Ya 17.39KN/m³ e=0.5 Gs=2.71 Ground Water Table e=0.95 G-2.75 f a.) Compute for the effective stress right below B. b.) Compute the effective stress of C c.) Compute the effective stress of D d.) Compute the pore pressure at Point C
Q.3. Find the size for particles of specific gravity 1.001, of which 80% are expected to be removed in a very good settling basin at a surface overflow rate of 40.8 m³/d.m2, if water temperature is 10 °C (u=1.307x103 N.S/m²) mm 200mm and 300 mm, Hazen-
Umniah 4:25 PM P HW.1-1.pdf 1 of 4 PROBLEMS Determine the void ratio of a soil if its bulk density is 120 lb/ft° and has a moisture content of 25%. The specific gravity of the soil particles is 2.7. Also, determine its dry density and degree of saturation. A soil has a bulk density of 135 lb/ft° and a dry density of 120 lb/lft, and the specific gravity of the soil particles is 2.75. Determine (a) moisture content, (b) degree of sat- uration, (c) void ratio, and (d) porosity. The weight fa sample of saturated soil before drving is 3 lh and after devineis IAhe speclia aravitu af sheil A 15) vord ratio emrosiy d hulk dencity and() dry density. A moist soil has a moisture content of 10.2%, weighs 40.66 lb, and occupies a volume of 0.33 ft³. The specific gravity of the soil particles is 2.7. Find (a) bulk density, (b) dry density, (c) void ratio, (d) porosity, (e) degree of saturation, and (f) volume occupied by water (ft³). The moist weight of 0.15 ft³ of soil is 18.6 lb. If the moisture…
A glass container with pervious bottom containing fine sand in loose state (void ratio = 0.8) is subjected to hydrostatic pressure from underneath until quick condition occurs in the sand. If the specific gravity of sand particles = 2.65, area of cross-section of sand sample= 10 cm2 and height of sample = 10 cm, compute the head of water in cm required to cause quicksand condition. a.9.17 b.0.45 c.7.29 d.0.9
Steady state seepage is taking place through a soil element at Q, 2 m below the ground surface immediately downstream of the toe of an earthen dam as shown in the sketch. The water level in a piezometer installed at P, 500 mm above Q. is at the ground surface. The water level in a piezometer installed at R, 500 mm below Q. is 100 mm above the ground surface. The bulk saturated unit weight of the soil is 18 kN/m³ and the unit weight of water is 9.81 kN/m3. The vertical effective stress (in kPa) at Q is P. 2 m
Stokes law.,
S
Q'-4a

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