A&B Test Questions - Florida Rural Water Association

More documents

Recommendations

Info

6. Polarization in an RO system is caused by:a. Fouling caused by high hardnessb Fouling of the Anode or Cathodec. Brine or Regeneration concentration that is too highd. Mineral Deposits along the edge of a membranee. Plugging of Membrane inner surfaces7. Reverse Osmosis Systemsa. do not require pretreatment to remove colloidal material.b. are designed to remove minerals and colloidal materialc. require pretreatment to remove colloidal materiald. can remove colloidal material only if coagulants are added to reject8. RO systems are best operated with all units1. in series to gain maximum removal rates2. in parallel to gain maximum throughput3. staggered with gradually decreasing number of modules4. staggered with gradually increasing number of modules9. The reserve osmosis elements should be cleaned when the operator observesa. Higher differential pressuresb. Higher operating pressuresc. Higher suspended solids in product waterd. Lower product water flow ratee. Lower salt rejection10. If a salty taste is noted in an RO process what is the most probable cause:a. Polarization is occurringb Service rate us too lowc. Brine or Regeneration Rate should be increasedd. Recycle Stream is too highe. Rinse Rate should be increased24
<strong>Water</strong> Stabilization1. Removal of hydrogen sulfide from water with a pH of 9.4 can be accomplished bya. increasing coagulant chemicalsb. lowering the PHc. increasing aeration and lowering pHd. increasing aeration2. Corrosion resulting from contact between two dissimilar metals is calleda. tuberculation corrosionb. erosion corrosionc. pitting corrosiond. galvanic corrosion3. Corrosion that forms mounds of iron oxide next to the anode is calledd. tuberculation corrosione. erosion corrosionc. pitting corrosiond. galvanic corrosion4. Chlorides tend to increase which type of corrosiona. tuberculation corrosionb. erosion corrosionc. pitting corrosiond. galvanic corrosion5. Turbulence tends to increase which type of corrosiona. tuberculation corrosionb. erosion corrosionc. pitting corrosiond. galvanic corrosion6. Black water complaints may be caused bya. corrosion of copper linesb. corrosion of ductile iron pipesc. sulfide corrosion of iron linesd. microbial activityTROUBLESHOOTINGGUIDE(SEE TABLE)25
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 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 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

Create successful ePaper yourself

Delete template?

Save as template?