1. Briefly summarize the Lead and Copper Rule. ___________________________________________________________________________________________ ___________________________________________________________________________________________ ___________________________________________________________________________________________ ___________________________________________________________________________________________ ___________________________________________________________________________________________ 2. How is minimizing the dissolution of lead/copper accomplished? ______________________________________________________________________________________________________________________________________________________________________________________ ___________________________________________________________________________________________ ___________________________________________________________________________________________ ___________________________________________________________________________________________ 3. Explain the associated problems in a water treatment and supply with corrosion. ___________________________________________________________________________________________ ___________________________________________________________________________________________ ___________________________________________________________________________________________ ___________________________________________________________________________________________ ___________________________________________________________________________________________ 4. Name the water quality and aesthetic issues that may develop in a water system with corrosion problems. ___________________________________________________________________________________________ ___________________________________________________________________________________________ ___________________________________________________________________________________________ ___________________________________________________________________________________________ ___________________________________________________________________________________________ 5. Identify the key water quality factors that affect corrosion. ___________________________________________________________________________________________ ___________________________________________________________________________________________ ___________________________________________________________________________________________ ___________________________________________________________________________________________ ___________________________________________________________________________________________ 6. Name and describe the two types of localized corrosion. ___________________________________________________________________________________________ ___________________________________________________________________________________________ ___________________________________________________________________________________________ ___________________________________________________________________________________________ ___________________________________________________________________________________________ 7. Define the uniform corrosion. ___________________________________________________________________________________________ ___________________________________________________________________________________________ ___________________________________________________________________________________________ ___________________________________________________________________________________________ ___________________________________________________________________________________________ 8. What is cathodic protection and why is it used on pipelines and storage tanks? ___________________________________________________________________________________________ ___________________________________________________________________________________________ ___________________________________________________________________________________________ ___________________________________________________________________________________________ ___________________________________________________________________________________________ 9. What are the corrective measures a water system takes to minimize problems with corrosion? ___________________________________________________________________________________________ ___________________________________________________________________________________________ ___________________________________________________________________________________________ ___________________________________________________________________________________________ ___________________________________________________________________________________________ 10. Define the term sequestering agent. ___________________________________________________________________________________________ ___________________________________________________________________________________________ ___________________________________________________________________________________________ ___________________________________________________________________________________________ ___________________________________________________________________________________________ 11. What types of tests are conducted to determine the corrosiveness of water on metal pipes, and what is the index called that utilizes the information derived from those tests? ___________________________________________________________________________________________ ___________________________________________________________________________________________ ___________________________________________________________________________________________ ___________________________________________________________________________________________ ___________________________________________________________________________________________ 12. What is another name for pH saturation? What effect does it have on distribution system water quality and how is it accomplished? ___________________________________________________________________________________________ ___________________________________________________________________________________________ ___________________________________________________________________________________________ ___________________________________________________________________________________________ ___________________________________________________________________________________________ Questions #13-24: Circle the Correct Choice. 13. PH: As pH decreases, the corrosion rate (increases or decreases). 14. Alkalinity: Affects the solubility of lead. Helps in keeping a stable ph. In most cases, as alkalinity increases, the corrosion rate (increases or decreases). 15. Total dissolved solids (TDS): Increases conductivity which increases the water's ability to conduct an electrical current. As the total dissolved solids concentration in the water increases, corrosion (increases or decreases). 16. Temperature: As temperature increases, the corrosion rate (increases or decreases). 17. Dissolved oxygen (DO): As the dissolved oxygen concentration in the water increases, the corrosion rate (increases or decreases). 18. Chlorides, Sulfates, Nitrates: As these increase, corrosion (increases or decreases) because they all add TDS to the water increasing its conductivity. 19. Chlorine: As the addition of gas chlorine increases, corrosion (increases or decreases) because it reduces pH. 20. Flow Velocity: Increased velocity (increases or decreases) the rate of corrosion if the water is corrosive. 21. If adding inhibitor increased velocity can (increase or decrease) rate of corrosion. 22. The solubility of calcium carbonate decreases as the temperature (increases or decreases). 23. Certain bacteria can (increase or decrease) corrosion rates because they give off carbon dioxide and hydrogen sulfide. They also can produce slime which can (increase or decrease) the rate of tuberculation. 24. Stray Currents (increase or decrease) the corrosion rate