Water Operator - TWUA
2. What minerals cause water hardness? a. Chlorine and Manganese b. Calcium and Magnesium c. Sulfates and Chlorides d. Carbon and Nitrogen e. Chlorine and Hydrogen 3. A public water system must at all times provide - a. Adequate quantity of water b. Adequate water pressure c. Adequate Disinfection d. All of the Above e. Only a & c 4.
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