Introduction to Water Distribution Systems Questions and Answers 100% Pass

Introduction to Water Distribution Systems Questions and Answers 100% Pass In private water supply systems, water is drawn from _____. a well To help prevent tooth decay, public water distribution systems add _____. fluoride A homeowner is having a well installed in an area where the water table is 30 feet below the surface. The type of well installed will most likely be dug or _____. driven More gallons per minute can be pumped from a well that is _____. deeper To dissolve carbon dioxide and to oxidize iron and manganese, water treatment systems use _____. aerators After water is pumped from a river or lake to a water treatment plant, the first step of treatment is _____. aeration To protect against corrosion and oxidation, galvanized pipe is electroplated with a coating of _____. zinc Water meters are usually installed by _____. a city or county employee Any reversed flow of used or nonpotable water into the potable water distribution system is called _____. backflow The flow of water in a water distribution system is regulated by a ______. valve A water supply line that a plumber is installing requires the close control of flow at all times. To ensure maximum control, the plumber should install a _____. globe valve The type of valve used in piping systems with extremely low backpressure is a _____. ball-check value The _____ should be installed so that it bypasses the water softener. hose bibb The type of valve that reduces the risk of scalding by mixing the water coming from the hot water heater to a preset temperature before it is delivered to the faucet is a _____. tempering valve