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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 electrical-generation utility sometimes pump liquid water into an elevated reservoir during periods of low electrical consumption. this water is used to generate electricity during periods when the demand for electricity exceeds the utilities a..
The direct strain at an angle of 30o,to one of theprincipal axes was 1.34x10-3 and the corresponding shearstrain was 8.52x10-4. Calculate as many principal or maximum strains at the point
Drawdown data from an observation piezometer near a well used for a pumping test with constant pumping rate is plotted on a semilog plot vs. time (the time axis, on the horizontal, is on a log scale).
A 4 X 12 (S4S) hem-fir timber beam carries a superimposed uniformly distributed load of 325 lb/ft on a simple span of 12ft. Determine the maximum bending stress and the maximum shear stress
A two-bed carbon adsorption system is to be designed to handle 8000 acfm of air containing 700 ppm of hexane. Laboratory studies indicate that carbon can adsorb 8lb hexane per 100 lb carbon under the conditions at which the system will be operated.
while groundwater andinfiltration losses over the period were estimated to be 0.6 inches. Determine the combined amounts of water evaporated and transpired from the region during the year of record.
refrigerant 134a is compressed at steady state from 2.4 bar, 0 degrees celcius, to 12 bar, 50 degrees celcius. Refrigerant enters the compressor with a volumetric flow rate of 0.38m^3/min, and the power input to the compressor is 2.6 kW.
A turbine discharges water at 0.4 m3/s under a head of 10.50 m and with an overall efficiency of 80 %. determine what is The power developed.
A 58.3 degree inclined plan has a spring with spring constant 23,400 N/m attached at the bottom.A 1.2 kg block is placed on the plane and compresses the spring a distance of 2.4 cm from equilibrium.
a water of 20 c temprature pupped at 75 kpa to a perforated pipe 5 cm dia. contain 10 hole with the same diameter. the distance between two adjacent hole is 20 cm. what is the discharge of each hole
if a hand-held GPS unit locates a latitudinal position with an uncertainty of + - 0.02-seconds, what is the distance uncertainty at the surface of the ellipsoid.
a highway reconstruction project is being undertaken to reduce crash rates. the reconstruction involves a major
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