What diameter would a circular clarifier have to be to remove 50 μm particles with 75% efficiency from a 4 MGD (million gallon per day) flow?  Assume the particle specific gravity is 1.5 and the temperature is 10°C.

Q: A 0.15 L sample of water has an initial dissolved oxygen level of 8.35 mg/L. After five days in…

A: BOD5=initial dissolved oxygen-final dissolved oxygen(sample volumesample bottle volume)

Q: An illegal connection was observed on a 300 mm diameter horizontal pipe. Upstream from the…

A: Given an illegal connection was observed on a 300 mm diameter horizontal pipe. Upstream from the…

Q: A column 3.00 cm in diameter and 32.6 cm long gives adequate resolution of a 72.4-mg mixture of…

A: Given :  diameter = 3.00cm length = 32.6cm mass of mixture = 72.4mg initially dissolved in 0.500mL…

Q: A BOD analysis was performed on a municipal wastewater. The 300 mL test bottle was filled with 2.0%…

A: Given Values: 300 mL test bottle. Dilution factor=2% Initial Dissolved Oxygen (DOi) =8.3 mg/L…

Q: A triangular trough is 5 m long, 2 m wide at the top and 2 m deep. If industrial strength acid is…

A: Given: The length of the trough is 5 m. The top width is 2 m. The depth is 2 m. The flow rate is 4.4…

Q: ductility of a tested material in terms of  percent elongation and percent reduction of area. The…

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Q: Estimate the teminal settling velocity in water at a temperature of 15 °C of spherical silicon…

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Q: 100-mL water sample is mixed with 200 mL of deionized water for BOD analysis. The DO of the mixture…

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Q: For a BOD analysis, 30 ml of waste with a DO of zero mg/L, is mixed with 270 ml of dilution water…

A: Biological oxygen demand is the measure of amount of oxygen required by microorganism to oxidize…

Q: Derive the equation for effluent tracer concentration from a CFSTR. Assume a step-input tracer test.…

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Q: A water contains a suspended solids concentration of 10.30 mg · L−1. Coagulation reduces this to 1.0…

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Q: The 50 cm diameter circular disc rotating at a constant angular speed of 400 rpm / minute is on the…

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Q: 1. The particle settling velocity in a fluid–particle suspension: (a) increases with increasing…

A: Following are required explanations :

Q: If a particle having a 0.0170-cm radius and density of 1.95 g · cm−3 is allowed to fall into…

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Q: If the settling velocity of a particle is 0.70 cm/s and the overflow rate of a horizontal flow…

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Q: An impellar blade unit operates at 50 rpm. Determine the degree of mixing? Also if the blade…

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Q: Glycerin (specific gravity 1.26) in a processing plant flows in a pipe at a rate of R L/s. At a…

A: Given: The specific gravity of the glycerin is 1.26. The flow rate in the pipe is R L/s. The…

Q: A tank initially holds 1 cubic meter of a brine solution containing 20 kg of salt. At t = 0, fresh…

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Q: : Calculate the settling velocity and the diameter of the circular tank, to settle particles of 0.5…

A: The settling velocity is also called terminal velocity. The terminal velocity is defined as the…

Q: A standard BOD test is run using seeded dilution water. The blank bottle containing the seeded…

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Q: Determine the moisture content and density (kg/m3) of the sample from the following data: Waste…

A: To find:- Moisture content Density  Of given municipal solid waste. Moisture content = (wet weight -…

Q: It is desired to remove dust particles (50µm) in diameter from (3.8 m³/sec) of air, using a…

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Q: Flocculation is very important in dewatering process. With special reference to the standard…

A: The water treatment process is a very progressive process where to achieve clear water we follow the…

Q: In a water jet cutting system, the orifice used has a diameter of 0.04 cm. What is the jet velocity…

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Q: pvd μ Re - Reynolds Number (Transition: R₂ ~ 2300) v - Velocity p-Density d-Pipe Diameter μ-Dynamic…

A: The given data is shown below: Crude specific gravity=0.8212

Q: 20 cm diameter sewer with invert slope of 1 in 500 is running full. Calculate the rate of flow in…

A: Vself-cleaning = 8kfS-1gdThe rate of flow or discharge through a sewer is equal to the volume of…

Q: 2. a) A Co-60 source gives a dose rate of 400 μSv/hr at 1 m. At what distance from the source must a…

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Q: oil having a sp.gr. of 0.90 flows through a 120 mm diameter pipe with a mean velocity of 5.3 m/s and…

A: Given:- Specific gravity =0.90 mean velocity =5.3m/s friction factor=0.01 absolute viscosity…

Q: A tank contains 1,500 L of water and 2020 kg of dissolved salt. Fresh water is entering the tank at…

A: For Salt dydt = Rate in - Rate out  ...(1)intering Rate = 0 , ( Because only  fresh water is…

Q: Calculate the BOD concentration based on the data below. DOinitial (mg/L)  7 DO final (mg/L 3.5…

A: step 1-

Q: a constant head permeability test a sample 10 cm long was tested in a permeameter with an inside…

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Q: A Semi-solid waste storage has a volume of 1145 m3. The basin is initially 71% empty. The semi-solid…

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Q: Please provide a clear solution. Thank you! If a certain liquid weighs 6.80 kN/m³. Compute the…

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Q: IF THE SPECIFIC WEIGHT OF A LIQUID IS 52lb/ft^3, WHAT IS ITS DENSITY? ANSWER:1.616slug/ft^3 PROVE…

A: Specific weight of the liquid =53lb/ft3

Q: The results of a water analysis for Sungai Buaya is shown below: Ca Mg²- Na* HCO; = 1.7 meq/L 2.5…

A: first find equivalent weight of Calcium Carbonate which is equal to 50.  and then find concentration…

Q: certain liquid flows in a 10mm diameter smooth pipe that is 20m long. The total head lost in the…

A: given - diameter of pipe , d = 10mm  length, L = 20.  head lost in pipe = 30m  Reynolds no. Re =…

Q: A sample of gas occupies 3.75 L at 1.15 atm and 25 °C. At what temperature will it occupy 4.00 L at…

A: A type of elastic collision in which two objects of equal mass initially move in the same direction…

Q: In the lead content analysis of a wastewater sample, 50.00 mL of the original sample was taken and…

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Q: A settling tank having a depth of 3.5 m and surface area of 1000 m2 is used to remove particles of…

A: Given: Depth of tank, H = 3.5 m Surface area, A = 1000 m2 Particle size, d = 0.01 mm Specific…

Q: An electrostatic precipitator (ESP) is currently used to remove fly ash from a stream of 100 m³/s…

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Q: 7. Calculate the amount of lime (84%) and soda (92%) required for treatment of 20,000 litres of…

A: Temporary hardness is cause by the bicarbonates of calcium and magnesium where as permanent hardness…

Q: A tank contains 100 L of water. A salt solution containing 2 kg of salt per liter flow in at the…

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Q: A large container of benzene is transported on the truck. Determine the level in each of the vent…

A: a=1.5m/s2 hA=hB=0.4m To find level in each vent pipe

Q: Table Q1-2 Weight (g) Mass of residue after drying at 105 ¿C Mass of residue after ignition at 550…

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Q: Groundwater ingress from a mine and contaminated water from an industrial plant is pumped into a…

A: Given data- Area of PCD=125 m2depth=4 mGroundwater flow rate=5 m3/daySodium concentration=18…

Q: A). If Liquids A, B and C, in the containers shown, have SG of 0.60, 1.00 and 1.60 respectively. At…

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Q: A settling tank having a depth of 3.5 m and surface area of 1000 m2 is used to remove particles of…

A: Given: Depth of tank, H = 3.5 m Surface area, A = 1000 m2 Particle size, d = 0.01 mm Specific…

Analysis and Procedures for Material Selection

The term material selection means to select the right material for various engineering applications. There are various engineering materials available and each has different individual properties. Thorough knowledge of the material properties and behavior is crucial in the design process. For instance, a structural member, such as a beam, is used to support vertical shear loads by the building itself. To withstand such loads, the material of the beam must possess adequate strength and stiffness to resist any deformation that might lead to the formation of cracks.