Water Operator Exam Quiz (Indiana): 1. Water filtration removes - TopicsExpress

Water Operator Exam Quiz (Indiana): 1. Water filtration removes impurities by what means? A. Adsorption B. Mechanical C. Ion exchange D. Both A and B above 2. Anthracite (coal) cap layers are used in water filters to assist in the removal of what? A. Oxygen (O2) B. pH (0-14) C. Hydrogen (H) D. Iron (Fe) 3. Media expansion is the best guide for backwashing pressure filters. A. True B. False 4. Lime-soda softening lowers the pH of water it treats. A. True B. False 5. Reverse osmosis can reduce levels of: A. Arsenic B. Lead C. Pesticides D. All of the above Answers: 1. d 2. d 3. b 4. b 5. d

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