Water Operator "B" - 200 Practice Q&A

in certain costal areas, intrusion of sea water in to groundwater basin is most commonly caused by? - Answer- over pumping from the ground basin Riparian rights are acquired how? - Answer- with title to land bordering surface water an underground layer of rock or soil that permeates the passage of water is called what? - Answer- an aquifer the first priority, from a public health perspective, is the production of what? - Answer- water that is drinkable and free from bacteria and toxins high color content in water would be indicative of all the following except : - Answer- a high PH what is NOT a common practice in watershed management? - Answer- allow wastewater discharges into the reservoir? controlling taste and odor problems and organic loading within the reservoir may reduce or eliminate: - Answer- activated carbon treatment chemical control of both plankton and periphyton in domestic water supply reservoirs is primarily used to prevent or control: - Answer- taste and odor problems resulting from algae blooms. the three major water quality indicators that affect the efficiency of using copper sulfate as an algicide are: - Answer- alkalinity, suspended matter, and water temperature. during periods of thermal stratification and anaerobic conditions, water quality improvements are obtained by: - Answer- the addition of dissolved oxygen the most common chemical used to treat algae blooms is? - Answer- cuso 4 the purpose of screening devices is to remove: - Answer- large solids in early winter, when the surface of a lake or reservoir cools to the same temperature as the lower layers, the reservoir destratifies, causing: - Answer- turnover to occur. the following conditions would be most conducive to triggering an algae bloom: - Answer- available nutrients such as nitrogen and phosphorous and abundant sunlight. the MCL for chlorides is? - Answer- 250 mg/l the MCL for iron is? - Answer- 0.3 mg/l