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2. Assume that the river has been selected as the source of raw water for the 2.0mgd demand.
a. Surface water has low alkalinity, high turbidity. The distribution system is cast iron pipe. What's the concern with using alum (Al2(SO4)3) as the coagulant. What other chemical could be used?
b. A slow sand filter will follow the coagulation-flocculation-sedimentation. The organic content in the raw water supports a biofilm on the filter surface. How might this reduce the disinfectant dosage? What text Figure shows this?
c. The 4' thick filters run q=500 gpd/ft2. Find the total area of filter surface required to treat the 2.0 mgd. Also compute the hydraulic residence time in the filter.
d. The filtered water still has traces of ammonia and dissolved organics. Calcium hypochlorite Ca(OCl)2 is used for disinfection. What's the advantage, what's the potential problem with using the hypochlorite rather than using ultraviolet (UV)?
A piston and a cylinder machine obtains a fluid system, which passes through a complete cycle of four processes. In the mean while a cycle the sum of all heat transfer is 150KJ and
explain with suitable eg. static and dynamic force analysis
A small producer of specialist vehicles is building a new workshop to meet expected demand for its products over a period of 5 years. The workshop will contain three workcentres,
Draw a single point cutting tool and define its various parts. Also describe the standard anglesof this cutting tool.
Necessity of Brakes To stop a vehicle in normal as well as emergency conditions. To slow down the speed to turn, pass hurdles etc.
A light cantilever of rectangular section (5cm deep and 2.5 cm wide) has a mass fixed at its free end. Find the ratio of frequency of free lateral vibration in vertical plane to th
Q. Describe Direct extrusion? • Direct extrusion, also known as forward extrusion, is the most common extrusion process. • It works by placing the billet in a heavy walle
mostly what aspects trouble mechanical engineers?
diference between thermal and thermodynamic equallibrim
what is zeroth law of thermodynamic ?
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