Water Distribution System Operation and Maintenance Questions with Correct Answers

Water Distribution System Operation and Maintenance Questions with Correct Answers What are the benefits of a distribution system storage? - Correct Answer 1. Demands on the source of water, pumping facilities, and transmission/distribution mains are more equalized. 2. System flows and pressures are improved/stabilized. 3. Reserve water supplies are available in case of emergencies. Types of Common Storage Facilities? - Correct Answer Clear wells, elevated tanks, standpipes, ground-level storage tanks, hydropneumatic/pressure tanks, and surge tanks What is Coliform? - Correct Answer Group of bacteria found in intestines of warm-blooded animals, plants, soil, air, and water. It's presence in water is an indication it is polluted. What is the proper air:water ratio for a hydropneumatic/pressure tank? - Correct Answer Two-thirds water to one-third air. atm - Correct Answer Abbreviation for "atmosphere". 1 atm = 14.7 psi or 100 kPa Absorption - Correct Answer The taking in or soaking up of one substance into the body of another by molecular or chemical action Acid rain - Correct Answer Precipitation that has been rendered acidic by airborne pollutants Acidic - Correct Answer The condition of water or soil that contains a sufficient amount of acid substances to lower the pH below 7.0 Acidification - Correct Answer The addition of an acid (nitric or sulfuric) to a sample to lower the pH below 2.0. The purpose of acidification is to fix a sample so it will not change until it is analyzed.