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- Gave wrong values earlier. These are the correct values A settling tank having a depth of 3.5 m and surface area of 1000 m2 is used to remove particles of size 0.01 mm and specific gravity of 2.6. Calculate the removal percentage of the tank for the discharge of 7000 m3/d. Take viscosity of water as 1.1x10-3 kg/m.s.Answer a &b.A tank initially holds 1 cubic meter of a brine solution containing 20 kg of salt. At t = 0, fresh water is poured into the tank at the rate of 0.02 m3/min, while the well-stirred mixture leaves the tank at the same rate. a). Find the amount of salt in the tank at any time t b). Find the time to remove the salt in the tankThe result No of blows(N) and water content in % (w) of liquid limit tests are given as follows: Trial 1 N= 48 w=32.1 Trial 2 N=38 w=35.1; Trial 3 N= 29 w=40.7; Trial 4 N=20 w=46.1; Trial 5 N=15 w=52.8. Determine the liquid limit. CHOICES: a.20 b.52 c.34 d.43
- A drainage pipe became completely blocked during/ a storm by a plug of sand, 1.5 m long, followed by another plug of a mixture of clays, silts and sands, 0.5m long, as shown in the attached figure. When the storm was over, the water level above ground was 1 m. The coefficient of permeability of the sand is 2x that of the mixture of clays, silts and sands. a. Calculate the pore water pressure at the center of the sand plug in kPa.Calculate the pore water pressure at the center of the mixture of clays, silts and sands in kPa. Find the average hydraulic conductivity in the sand. Find the average hydraulic conductivity in the mixture of clays, silts and sandsA drainage pipe became completely blocked during/ a storm by a plug of sand, 1.5 m long, followed by another plug of a mixture of clays, silts and sands, 0.5m long, as shown in the attached figure. When the storm was over, the water level above ground was 1 m. The coefficient of permeability of the sand is 2x that of the mixture of clays, silts and sands. a. Calculate the pore water pressure at the center of the sand plug in kPaa.Determine the volume of lead weighing 110 kN/m^3 must be fastened to the outside bottom to make the cylinder float vertically with 1m submerged? 1kg = 9.81 N b. What volume of lead is required if placed inside the cylinder? COMPLETE SOLUTION PLS
- 6. Freshwater and seawater flowing in parallel horizontal pipelines are connected to each other by a double U-tube manometer, as shown in figure. Determine the pressure difference ?????? ?????−???? ?????= ?(kPa) between the two pipelines. Take the density of seawater at that location to be P = 1035 kg/m³. (2 decimal)Hydrometeorology (Ground Water) Recuperation Test A recuperation test was carried out on a 1-meter diameter clay open well. Calculate the yield in m3/hr of the said well at a specific point in time when the depression head is 0.8 m. Show your solutionFor the closed tank with Bourdon-tube gages tapped into it, as shown in Figure 4, what is the specific gravity of the oil and the pressure reading on gage C?
- Sand is contained in a hopper that is in the shape of an inverted circular cone. Sand flows out of the vertex ata rate of 10 m3 /min. The cone has a height of 10 m and a rope diameter of 12 m. Find the rate at which the surface level of the sand is falling when the depth of the sand is 3m above the vertex. a. The surface level of the sand is falling at a rate of 125/9pi m/min b. The surface level of the sand is falling at a rate of 125/162pi m/min c. The surface level of the sand is falling at a rate of 10/9pi m/min d. The surface level of the sand is falling at a rate of 259/81pi m/minThe SQUARE base permeameter (seen from above), has three soil layers arranged vertically as shown in the image. L is: 70cm, the difference of head h is: 105 cm. The coefficient of permeability of soil 1 K1 is 0.065 cm/sec, soil 2 K2 is 0.0030 cm/sec and soil 3 K3 is the 0.0095 Calculate the amount of water collected in a time of 10 minutes.A setlling chamber is used to remove sand and grit from the influent water to a wastewater treatment plant. Conditions are: Chamber Height = 3m Chamber Width = 2m Chamber Length = 7m Water Flow Rate = 0.5m3/min Particle Density = 2.65g/cm3 a) What is the minimum settling velocity required for a particle to be required for a particle to be removed by this setlling chamber? Express your answer in units of cm s-1. b) Assume that this or another setlling chamber removes all particles having settling velocities greater or equal to 0.04 cm s-1. What is the minimum particle diameter that would b e entirely removed by such a setlling chamber? Express your answer in units of micrometers. (For part (b), assume the particle being removed is approximately spherical, and the water is at 22°C (density = 997.7 kg/m3, dynamic viscosity = 0.957x10-3 kgm-1s-1). If you use Stoke’s law as part of your solution, be sure to use the Reynolds number to confirm you are in the laminar flow range.)