A&B Test Questions - Florida Rural Water Association

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7. The primary source of household plumbing problems isa. tuberculation corrosionb. erosion corrosionc. pitting corrosiond. galvanic corrosionTROUBLESHOOTINGGUIDE SECTION8. If a pH of a finished water is 8.0 and has high levels of carbon dioxide and dissolvedoxygen, the water isa. noncorrosiveb. corrosivec. scale formingd. saturated9: In order for Ca CO3 film to form, one of the following conditions must bemet.A: no HCO 3 ions must be presentB: pH values must be In excess of 10C: the water must be undersaturated with OH IonsD The. Langlier Index must be zero10: Identify the correct reaction that will form a calcium carbonate film.A: Ca 2+ + HCO3 + OH > CaCO 3 + H 2 0B: Ca 2+ + CaCO 3 + OH> HCO3 + H 2 OC: CaCO 3 + CO3 + H2O > Ca 2 + 2 HCO3D: 2 HC0 3 + CO3 + H 2 0 > Ca 2 + CaC0311. Which one of the following is not one of the indices that can be used to determine calciumcarbonate saturation of a water?A: driving force indexB; Langelier indexC; Rossum indexD: aggressive indexTROUBLESHOOTINGGUIDE SECTION26
12: From the results of the MARBLE TESTS below, which sample would be corrosive to awater system over a long period of time?Sample pH Alk. Hardness1 before CaCO3 8.3 84 1171 after CaCO3 8.3 84 1172 before CsCO3 8.3 90 1182 After CaCO3 8.1 88 115TROUBLESHOOTINGGUIDE SECTION3 before CaCO3 7.8 88 140After CaCO3 8.2 94 1484 before CaCO3 7.9 90 1384 after CaCO3 8.0 89 133A: sample 1B: sample 2C: sample 3D sample 413: positive Langlier Index is an indicator that the water isA: corrosiveB: scale formingC: stableD: equilibriumTROUBLESHOOTINGGUIDE SECTION14: The metabolic process that consumes oxygen and releases carbon dioxide is called?A: respirationB: photosynthesisC: eutrophicationD sterilizationE. hydrolosis15: Low pH and the absence of oxygen in a section of the distribution system may result inA: the formation of phenol-misted odorsB: The de-zincification of ductile pipeC: formation of hydrogen sulfideD: conditions ideal for the growth of aerobic bacteria27
Page 2 and 3: Table of ContentsCHLORINATION AND D
Page 4: 6: Chlorine dioxide reacts with wat
Page 8 and 9: 25: Which one of the following is t
Page 10 and 11: Disinfection By-Products1: Trihalom
Page 12 and 13: Lime Softening1. Minimum hardness t
Page 14 and 15: 11. Using the analyses below, calcu
Page 16 and 17: 21: In spilt treatment, a portion o
Page 18 and 19: 30. What will the dosage rate be fo
Page 20 and 21: Ion Exchange Softening1. Minimum ha
Page 22 and 23: 12. The third stage in the ion exch
Page 24 and 25: 6. Polarization in an RO system is
Page 28 and 29: 16. A Langlier Index 0 or a Driving
Page 30 and 31: Iron and Manganese Removal1. The mi
Page 32 and 33: Taste and Odor Removal1. The first
Page 34 and 35: Problem: Marshy, or woody odor. Use
Page 36 and 37: 6. What should you do if test resul
Page 38 and 39: 14. All but one of the choices belo
Page 40 and 41: 6. It is in the middle of the summe
Page 42 and 43: 5. Your feed rate scale for Floccul
Page 44 and 45: 11. You are considering the additio
Page 46 and 47: Water Chemistry1. Which of the foll
Page 48 and 49: 13. Health authorities encourage us
Page 50 and 51: 24. A well water has a pH of 6.2, a
Page 52 and 53: 35. Zeta potential is nota. an elec

A&B Test Questions - Florida Rural Water Association

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