A&B Test Questions - Florida Rural Water Association

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24. A well water has a pH of 6.2, alkalinity 540, total hardness 320, calcium hardness 120,turbidity 5, color 300, TDS 100, TOC 35. Which treatment process should be useda. disinfection/filtrationb. lime—soda ashc. conventional lime softeningd. Ion exchangee. R0f. Electrodialysis25. When using a pH meter the deterioration in the electrode must be corrected bya. adjusting the temp controlb. slope control adjustmentc. storing the electrode in pH buffer 7d. all of the above26. The chlorine residual method that is the standard for regulatory purposes isa. amperometric titrationb. color comparisonc. DPDd. orthotolidine27. A glass tube partially filled with liquid that measures gas pressure is called aa. pressure gaugeb. hydrometerc. rotameterd. manometer28. Which of the following statements is true regarding ground water movementa. Preésure differences between the areas of recharge and discharge have little effecton rate of flow.b. The zone of capillary fringe increases the flow by draining water into the aquifer.c. Ground water moves continually, even though the movement may be slow.d. Seasonal variations have little effect on the slope of the water table.29. The negative electrode where reduction occurs is calleda. anionb. anodec. cathoded. cation50
30. A utility that serves a population of 25001 to 28000 must pick up the following number ofcoliform samples per montha. 20b. 40c. 50d. 6031. An example of a cation isa. chlorideb. sulfatec. bicarbonated. sodium32. The principal reason for using soda ash is toa. increase alkalinityb. remove noncarbonate hardnessc. remove carbon dioxided. remove carbonate hardness33. Coagulants normally used in water treatment releasea. negatively charged ions.b. ions having more than one positive chargec. multivalent negative Ionsd. monovalent positive ions34. Nonsettlable solids are classified into 3 categoriesa. suspended, colloidal, dissolvedb. colloidal, dissolved, total dissolvedc. coarse, fine, very fined. colloidal, suspended. settleable51
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 26 and 27: 7. The primary source of household
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 52 and 53: 35. Zeta potential is nota. an elec

A&B Test Questions - Florida Rural Water Association

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