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A WTP Operator is trying to size a pump that takes water from a WTP holding tank and sends it to a house on a hill above the plant. The operator's goal is to have 60 psi of water pressure entering the house. The operator knows that the head loss (major+minor) from the holding reservoir to the pump is three times the velocity head in the 8 inch diameter pipe, and the head loss from the pump to the house is seen times the velocity head of the pipe. If the pressure head at the inlet of the pump is -8ft and the velocity head entering the house is the same as the velocity head in the pipe at the pump, determine what pressure head is needed from the pump to achieve the operator's goal of 60 psi of water pressure. (hint: notice the velocity head at the house is the same as the velocity head in the pipe at the pump
calculate the required compressive strength for a concrete mix design if f'c = 5000 psi and data indicate a standard deviation of 600 psi based on 15 tests for a similar concrete mix.
Predict the aqueous phase equilibrium concentration of phenanthrene at 25*C if the values for this compound are Cs = 1.1 mg/L, P^v = 1.6 x 10^-7 atm, KH = 4.0 x 10^-5 atm*m^3/mol, and logKow = 4.52.
When a fluid flows through a sharp bend, low pressures may developin localized regions of the bend. Estimate the minimumabsolute pressure (in psi) that can develop without causingcavitation if the fluid is water at 160 oF.
Determine the chemical oxygen demand (COD) of a mixture of 250 mg/l glutamic acid (C5H10N2O3) and 200 mg/l of glucose(C6H12O6).
A wood mallet has a cylindrical head 6 inches long and 3 inches in diameter. If the cylindrical head is 1 inch in diameter how long must it be for the mallet to balance at a point 6 inches from where the handle enters the mallet
What is the highest downward speed (the terminal velocity), in miles per hour, ? At the terminal velocity the downward force (the weight) is equal to the upward force (the aerodynamic drag force).
A trapezoid has a bottom width of b, and top width of T, a heightof h, and side slopes of z(horizontal to vertical). By integration, determine the location of the centroid of thetrapezoid Define your coordinate system.
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 ..
A rigid tank contains 40 lbm of air in 20 psia and 70 degrees F. More air is added to the tank untill the pressure and temperature rise to 35 psia and 90 degrees F, respectively.
A 6-lane freeway horiz. alignment has a 1200' C.L. radius going into a tangent and then a reversing 1800' radius. How much tangent distance between the two curves is needed to meet the superelevation runoff requirements
The total number of effective exposures per unit of advertising medium depends on the region reached. In Louisiana, the number of effective exposures is 70,000, 100,000 and 75,000 for television, radio and direct mail, respectively.
a well is contaminant with 340 mg/L of tetrachloride ( perchloroethylene). the water must be remediated to achieve a concentration of 0.2 mg/L ( the detention limit ).
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