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A hypothetical water treatment train consisting of coagulation/flocculation unit, filtration unit and chlorination system is used to treat surface water characterized by bacterial concentration of 800,000 CFU/L. If the log removal for each system is given below, what is the final concentration of CFU/L after the water goes through the treatment train?
Treatment Train Unit Log Removal for the unit
Coagulation/Flocculation 2.1
Filtration 1.3
Chlorination 2.5
Determine the design hourly volume for the road below, recommend the K factor first.
A student counted 92,90,92,91,93, and 91 paces in six trials of walking along a course of 200 ft known length on level ground. Then 85,86,86 and 84 paces were counted in walking four repititions of an unknown distance AB.
The following boundary conditions apply at x=0, ca = Keqcao and T=To and at x=L, (dco/dx)=0 and (dT/dx)=0. Determine the concentration and temperature profiles for this system.
a brass wire of diameter d=1/6 in is stretched between rigid supports with an initial tension T of 37lb. assume the coefficient of thermal expansion is 10.6X10^-6 / F and the modulus of elasticity is 15X10^6 psi.
An overpass is being built over the PVI of an existing equal tangent sag curve. The sag curve has a 70 mi/h design speed, and G1 = -6%, G2 = +3%.
A soil sample with a water content of 14.5% and unit weight of 128.2 lb/cu. ft. was dried to a unit weight of 118.8 lb/cu. ft. without changing its void ratio. What is its new water content (in %)?
A tub of a washing machine is rotating at 50 rad/s when the power is turned off. If it takes 15s for the tub to come to rest, determine (a) the constant angular deceleration, and (b) the total number of revolutions the tub makes.
What would the B/C ratio be if the light poles were twice as far apart as assumed above?
what is the engineering ethics course where to write about any engineering ethical case and discuss the ethical issue?
What is the ratio of the magnitude of E2 to the magnitude of E1? You may neglect the effects of gravity on the proton.
While the swing bridge is closing with a constant rotation of 0.5 rad/s, a man runs along the roadway such that when d = 10 ft he is running outward from the center at 5ft/s with an acceleration of 2 ft/s^2, both measured relative to the roadway.
a. What is this investment's external rate of return b. What is the decision rule for judging the attractiveness of investments based on external rate of return c. Should Aerotron Electronics buy the water filtration system
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