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A surface treatment plant at a winter resort city has been designed to process cold, low turbidity water by direct filtration. The temperature is 10°C and the pH = 7.4. At the critical flow of 3 mgd, the t10is 90 min.
What concentration of chlorine is required at the end of the tank to ensure compliance with the EPA? (You will need to extrapolate to get Ct for pH = 7.4 and guess a chlorine concentration and then re-adjust your Ct requirement to solve for the final concentration...)
What concentration would be required if you used chlorine dioxide instead?
Define an Fe-C martensite. (b) Describe the following types of Fe-C martensites that occure in plain-carbon steels: (i) lath martensite, (ii) plate martensite. (c) Describe some of the characteristics of the Fe-C martensite
A horizontal Curve is designed for a two lane mountainous terrain. The following data are known. intersection angle: 40 degrees tangent length: 436.76 ft Station on PI: 2700+10.65 fs=0.12 e=0.08
The velocity along a pathline is given by V (m/s) = s^2 x t^(1/2) where s is in meters and t is in seconds. The radius of curvature is 0.5 m. Evaluate the acceleration along and normal to the path at s = 2m and t = 0.5 seconds.
above a peninsula of land. the length of the box is 25 km, its width is 80 km, and a radiation inversion restricts mixing to 25 m. Wind is blowing clean air into the long dimention of the box at 0.8 m/s.
A galvanized iron pipe with a roughness height (e) of 5x10-6 m with a diameter (D) of 0.05 m and a length (L) of 100 m carries a discharge (Q) of 0.003 m3/s. Calculate the head loss (hL).
A person (mass of 80g) is lifted upward by a 2 cm diameter safety rope with constant velocity. What is the tensile stress in the rope
A confined aquifer has a specific storage of 2.5 * 10^-6 /m . The porosity is .20 and the water compressibility is 5 * 10-10/Pa.For the aquifer skeleton compressibility you just calculated, what would the aquifer specific storage be if porosity were ..
A footing 3m X 3m carries a pressure of 500 kN/ m2 at a depth of 1m in a sand substrate. The saturated unit weight of the sand is 20 kN/ m3 and the unit weight above the water table is 18 kN/ m3.
Considere a person who consumes 2100 kcal par day, of which 2000 kcal is converted thermal energy.( the remaining 100 kcal is used to do work on the environment.) The person has a surface area of 1.8 m² and is dressed in a bathing suit.
A pitot-static tube is used to measure the velocity at the center of the pipe. If the fluid velocity is 10 ft/s, what is the deflection on a mercury manometer connected to the pitot-static tube
A 1.5-lb ball that can slide on a horizontal frictionless surface is attached to a fixed point O by means of an elastic cord of constant k = 1 lb/in. and undeformed length 2 ft. The ball is placed at a point
The temperature was 200C, and the void ratio (e) of the soil was 0.43. Calculate the "Coefficient of Permeability" in "centimeters per second" (Given, k = (QL)÷(A Δh t)).
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