A&B Test Questions - Florida Rural Water Association

More documents

Recommendations

Info

16. A Langlier Index 0 or a Driving Force Index of 1 indicates the water isA; supersaturatedB: saturatedC: undersaturatedD: corrosiveTROUBLESHOOTINGGUIDE SECTION17. The parameters necessary to calculate the Driving Force Index are?A: temperature, CaCO3, pH, Oxygen, K’ sp for CaCO3B: temperature, pH, Mg, Free CO2, total alkalinityC: temperature, pH, Salinity, Hardness, CO3 2- , mg/l as CaCO3D: temperature, TDS, Ca hardness, CO3 2- , mg/l as CaCO3, K’ sp for CaCO318. Electrolysis is the result of ______.A; a corrosive oxygen cellB: a corrosive galvanic cellC: breakdown of Cathodic protectionD: stray electric current19: From the following water analysis, which corrosion control chemicals would be best toselect?Ca 2+ hardness: 40 mg/L Total Alkalinity: 11 mg/L TDS: 137A line or sodium carbonateB: lime or caustic sodaC: lime and carbon dioxideD: caustic soda or soda ash20: When a galvanic cell occurs as a result of two dissimilar metals. It is important to know thatcorrosion will always occur at the:A: neutral electrodeB: cathodeC: potentiometric surfaceD: anode21: _______ Inhibits corrosion by forming a film on the interior of water pipes.A: turberculesB: DOC: calcium carbonateD salinity28
22: Scaling is a problem in hot water systems because _____ is lesssoluble in hot water than In cold water.A: IronB: dissolved oxygenC: chlorineD: calcium carbonate23: <strong>Test</strong> results indicate a pHs value of 8.7 and a pH value of 8.8 for treated water. What doesthis mean?A: the water is corrosiveB: the Langleir index is between -0.2 and .0.2C: the pH should be increased to 9.5D: the water is undersaturated with calcium24: In selecting corrosion control chemicals, If the product from multiplying the calciumhardness by the alkalinity is 80, this indicates that:A: either lime or soda ash would be satisfactoryB: both lime and carbon dioxide may be requiredC: soda ash will be ruled out because of expenseD: the water is stable and requires no calcium25. gram of calcium carbonate is added to a filtered water sample giving the following results;determine the calcium carbonate precipitation potential.Initial pH = 8.7Final pH = 9.1Initial Hardness = 34 mg/lFinal Hardness = 38 mg/lInitial Alkalinity = 24 mg/lFinal Alkalinity = 27 mg/l.a. 0.4b. –3c. –4d. 3e. 429
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 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?