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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)?
Classification Two categories of plastics are identified. Those are: thermosetting plastics and thermoplastics. Plastics generally cannot stand higher temperatures. They becom
Advantages of Pinion Cutter Generating Process 1. A single cutter can be used for cutting all spur gears of identical pitch as that of the cutter. 2. Internal gears can be g
An electric heating element is rated at 4.0kW when connected to a single phase 240Vrms, 50 Hz AC supply, and is known to have a power factor of 0.833 lagging. 1. Calculate the c
(a) What is the function of a spark plug? (b) What are the types of spark plugs? Point out the differences between them. (c) Describe the construction of a spark plug with th
Examine the CNC machines at University of Greenwich. You are needed to present and discuss about the major functional units and vital machine elements of the CNC milling at Univer
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what is soundness of casting.
Consider the expansion loop displayed in the diagram below, which is part of a long pipeline. The loop is made up of a uniform pipe section and is subjected to a temperature raise
Four (04) coins are tossed simultaneously (ie at the same time) and results in either a HEADS or a TAILS in each coin. Develop a simple computer model on MS EXCEL to simulate the t
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