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Design of Small Water Systems


Quiz Questions

1.Pumping, storage, and distribution facilities are needed to deliver treated water to users in response to widely varying rates of demand. Since all three components must work together to serve this purpose, their designs must be carefully integrated.
True
False
2. A contaminant is any physical, chemical, biological, or radiological substance or matter in water.
True
False
3.The MCL is the maximum permissible level of a contaminant in water delivered to the free-flowing outlet of the ultimate user of a public water system, except in the case of turbidity where the maximum permissible level is measured at the point of entry to the distribution system.
True
False
4.A ________________________________ is a public water system that serves at least 15 service connections used by year-round residents or regularly serves at least 25 year-round residents.
Community water system
Non-community water system
5. Transient non-community water system is a public water supply serving a transient population of at least 25 people a day at least 60 days a year.
True
False
6. MCLs for microbiological contaminants are applicable to both community and noncommunity water systems.
True
False
7.SMCLs is an acronym for __________________________________________________.
Secondary maximum contaminant levels
Superior mode contaminant levels
8. _________________________ are nuisance organisms that may occasionally bloom and cause operational problems such as filter clogging as well as undesirable tastes and odors.
Algae
Viruses
9.Protozoans are microscopic animals that are not found in water.
True
False
10. Turbidity results from optical properties that cause light to be scattered and/or absorbed rather than transmitted directly through the medium of interest.
True
False
11.Well casings serve to provide a stable, uniform opening from the surface to the aquifer by preventing collapse of the well wall. They also serve to prevent the entry of possibly contaminated water from other waterbearing strata or the surface. Sometimes the casing is placed as the well is being drilled depending on the method of well construction.
True
False
12.Submerged intakes may be applicable to lakes, streams, and impoundments, and are frequently utilized by small water systems.
True
False
13.The most popular methods of iron removal involve oxidation of the iron by aeration, chlorination, or treatment with potassium permanganate, followed by some form of filtration.
True
False
14. Control of pH is very important when __________________is used as a coagulant.
Alum
Iodine
15. Slow sand filters are generally used following coagulation, flocculation, and settling.
True
False