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A municipal water plant has four filters that are each 20 ft long by 15 ft wide by 5 ft deep. The demand for water requires that they only operate, on average, three filters per day at a loading of 3 gallons per min / ft^2. They backwash one filter per day at 15 gpm/ft^2 for 15 min and rewash at 3 gpm/ft^2 for 5 min. How much water do they produce for the municipality per day? What percent of the produced water do they waste?
An 80-mil (2 mm) HDPE geomembrane with an allowable stress of 1,300 lb/in2 rests on a 3(H):1(V) side slope. A 18-inch thick cover soil with a unit weight of 110 lb/in3 (also unit weight of the back fill soil in the anchor trench) is placed of the ..
Compute the nominal shear strength of an M10 x 7.5 of A 572 grade 65 steel
how do you find the force ratio equation to determine the maximum total load that can be applied to a truss?nbspgiven a
When the engine of the plane is running, the vertical reaction that the ground exerts on the wheel at A is measured as 616lb . When the engine is turned off, however, the vertical reactions at A and B are 520lb each.
A steel pipe carries an industrial oil under pressure. The steel pipe inside diameter is 36 in, the pressure head on the fluid is 383.0 ft. A)- Find the internal fluid pressure in psi
The landing gear of an airplane can be idealized as the spring-mass damper system. If the runway surface is described y(t)=y0 cos wt, determine the values of k and c that limit the amplitude of vibration of the airplane (x) to 0.1m. Assume m=2000k..
identical bricks 0.1m wide and weighting 2kg are placed on a plate assume the plate has neligible weight. calculate the
A soil sample has a wet unit weight of 96 lb/ft^3, amoisture content of 17% and a degree of saturation of 60%. Findthe: (A) Void Ratio, (B) Specific gravity, (C) Saturated unitweight.
A larger-diameter pipeline will cost $2.1 million installed, but its operating cost will be only $8000 per month. Which pipe size is more economical at an interest rate of 1% per month on the basis of an annual worth analysis
A trapezoidal channel having bottom width of 8 m and side slopes of 1 : 1, carries a discharge of 80 m^3/s. Find the conjugate depth to an initial flow depth of 0.75 m before the jump.
find the pressure required to fill the container when the height of the fluid is h = 0.75m at both point 1 (intake 1) and 2 (intake 2). Assume the air is at atmospheric pressure until the water level passes intake 2 (at h = 0.5m) and the air follo..
If an additional 11ft lane is added (each direction) and all other factors stay the same, what will be the new level of service?
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