Grade 2 Water Operator |158 Questions| With Correct Answers.

Powered activated carbon is usually used to control what? {Ans: Organic Compounds Responsible for Tastes and Odors}Community water systems must check the natural radioactivity in their water supply at least? {Ans: Once every four years}What units ae the MCLs for radium-226, radium 228 and gross alpha particles radioactivity measured in? {Ans: Drawdown}What organism is associated with taste and odors? {Ans: Oscillatoria}When it is dissolved in water for disinfection purposes, how long does ozone last? {Ans: A few seconds to a few minutes}What is dental fluorosis? {Ans: Mottling of the Teeth}