WATER TREATMENT OPERATOR CERTIFICATION STUDY GUIDE (AWWA) 2023 QUESTIONS AND ANSWERS ALREADY PASSED A+

A continuously flowing watercourse - CORRECT ANS Perennial Stream Algae causes PH to ....... at night - CORRECT ANS Decrease What contributes to creation of algae blooms - CORRECT ANS Increased nutrients Iron is found mostly in what sources of water - CORRECT ANS Groundwater Also called the rule of reasonable sharing - CORRECT ANS Riparian Doctrine Water high in salinity and warm is - CORRECT ANS Low in dissolved oxygen Reservoir turnover - CORRECT ANS Denser water at surface sinking toward the bottom Water that flows into rivers after rainfall - CORRECT ANS Surface runoff Recreation can ....... of land adjacent to a reservoir - CORRECT ANS increase the threat of erosion Water bearing geological zone composed of material deposited by flowing rivers - CORRECT ANS Alluvial aquifer What effect will algae have on dissolved oxygen - CORRECT ANS Increase DO during the day and lower DO during the night How does alkalinity effect the use of copper sulfate - CORRECT ANS Copper sulfate is more effective as alkalinity decreases The amount of water in a formation depends on..... - CORRECT ANS The porosity of the water-bearing formation What enables blue green algae to grow - CORRECT ANS Nutrients Recommended loading rate of copper sulfate for algae control - CORRECT ANS 5.4 lbs per acre of surface area Primary origin of coliform bacteria - CORRECT ANS Animal or human feces Amount of water a well produces for each foot of drawdown - CORRECT ANS Specific capacity Most common well used in public water supply - CORRECT ANS Drilled well What is disinfection - CORRECT ANS inactivation or killing of pathogenic organisms free chlorine residual valus are based on a contact time of.... - CORRECT ANS 10 minutes Strength of Calcium Hypochlorite - CORRECT ANS 65-70% What chemicals raise PH in water - CORRECT ANS Soda Ash, Caustic Soda, As water temp increases, disinfection action....... - CORRECT ANS Increases Maximum chlorine usage per day from a 150lb cylinder - CORRECT ANS 42 lbs What chemical is used to soften water through chemical precipitation - CORRECT ANS Calcium hydroxide (lime) Mudballs are clumps of........