In a continuous flow settling tank, 3.5 m deep and 65 m long, if the flow velocity of water observed is 1.22 cm/s. what size of the particles of specific gravity 2.65 may be effectively removed? Assume temperature 25°C and kinematic viscosity of water as 0.01 cm²/s.
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- 4. A settling chamber is to be 2 m wide, 7 m high, 13 m long and has 10 trays, including the bottom surface. This chamber is designed to collect particles of 1600 kg/m' density of a stream of 5 m/s. There is 2 cm dust layer on the trays. a. Compute the Reynolds number and decide if the turbulent flow assumption is reasonable b. Find the diameter of the particles that are collected with 0.90 efficiency.Flow velocity of water 1.25 cm/sec is observed in a continuous flow settling tank 4.5 m deep and 60 m long. The diameter of the particles of specific gravity 2.65 that may be effectively removed is (Assume temperature is 25°C and kinematic viscosity of water v = 0.01 cm2/s).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.
- A time independent non Newtonian fluid of density 0,00085kg/cm3 flows in a cylindrical pipe with a mean linear velocity of 1.70 m/s at steady state. The pipe is 3m long with an inside diameter of 0.075m. The point pipe consistency coefficient is 1.52 (N/m2)s0.3 and the flow behavior index is 0.3. Determine: a) The point values of the apparent viscosity. b) Reynolds Number. c) Pressure drop in Pascals.The discharge of water collected from a constant head permeameter in a period of 15 minutes is 500 ml. The internal diameter of the permeameter is 5 cm and the measured difference in head between two gauging points 15 cm vertically apart is 40 cm. Calculate (a) the coefficient of permeability (mm/s), (b) If the dry weight of the 15-cm long sample is 4.86 N and the specific gravity of the solids is 2.65, calculate the seepage velocity (mm/s).The discharge of water collected from a constant head permeameter in a period of 15 minutes is 500 ml. The internal diameter of the permeameter is 5 cm and the measured difference in head between two gauging points 15 cm vertically apart is 40 cm.If the dry weight of the 15 cm long sample is 4.86 N and the specific gravity of the solids is 2.65, calculate the seepage velocity in mm/s. a.3.72 x 10^(-1) b.0.106 c.0.750 d.0.3788
- Find the length of a settling chamber needed to collect 90% of 50 µm particulates (Pp= 1.2 g/cm³). The chamber is 2 m wide and 4 m tall. The air flow rate is 25 m/sec, and it is at 20 °C and 1 atm.There is a capillary action that takes place above the groundwater table up to 1.3 m in height. Assume the unit weight of water is ten kPa. Calculate the pore water pressure at the surface of groundwater table О 13 КРа О 10 КРа О ОКРа O -13kPaSITUATION 4 The soil under a dam has three layers with different coeffident of permeability. Determine the following: (a) Calculate the equivalent hydraulic conductivity in am/sec. (b) Compute the Transmissibility of the soil when the water table is at the ground surface, in sq.cm/ sec (Note: Transmissibility= k x distance) (c) Determine the seepage velocity of water moving through soil if it has a void ratio of 0.60 and a hydraulic gradient of 0.0018 in cm/hr. Illustration for Situation 4 KI = 0.000 I0 cm/sec at 3m K2= 0.032 cm/sec at 4m K3= 0.000041 cm/sec at Gm
- (a) A groundwater borehole at USM engineering campus contains 3000 mg/L of TDS. The flow is 0.32 m3 /s. The design TDS concentration of the product water is below 400 mg/L. The net pressure is 40 atm. The membrane manufacturer provides that the membrane has a water flux rate coefficient of 2.2 x 10-6 s/m and a solute mass transfer rate of 1.5 x 10-6 m/s. Calculate the membrane area required for the RO system. (B) A water treatment at Nibong Tebal receiving a raw water contains a concentration of 0.5 µg/m3 atrazine from Kerian River. In order to comply with the drinking water quality guideline, the treatment plant should reduce the concentration of Atrazine to 0.1 µg/L. If the dosing of powdered activated carbon have been applied before the coagulation, calculate the minimal dose of PAC in mg/m3 .Direction: Choose A- When both statements are true; B - When both statements are false; C- When the first statement is true and the second statement is false; D- When the first statement is false and the second statement is true. First Statement: The piezometric surface of an aquifer confined by an aquiclude is higher than that of an unconfined. Second Statement: Hydraulic conductivity is a measure of permeability or impermeability of a geologic unit. OA B. D.In a dyehouse, the water flow rate passing through a pipe with radius r is Q = 0.05 m3 / s and its density is ρ = 1000 kg / m3. The pipe friction coefficient is Cf = 0.0075 and the local loss coefficient is K = 10. Pressure drop in the pipe; LaTeX: \ Delta P = \ rho \ left (2Cf \ ast \ frac {L} (r} + K \ right) \ frac (V ^ 2} (2) ΔP = ρ (2Cf * Lr + K) V22 where the water velocity in the pipe can be calculated with V = Q / (r2). What should be the radius of the pipe so that the pressure drop that will occur in a pipe of L = 100 m length does not exceed =P = 200 000 N / m2? State the tolerance value provided by the result you found.