# Math for Water Treatment Operators: Practice Problems to Prepare for Water Treatment Operator Certification Exams

American Water Works Association, Jan 12, 2011 - Engineering mathematics - 365 pages

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### Contents

 WATER TREATMENT GRADE 1 1 Temperature Conversion Problems 5 Percent and Parts per Million Conversion Problems 6 Percent Calculations 7 Average Calculations 8 Area Problems 9 Circumference Problems 11 Volume Problems 12
 Hardness Problems 112 Solution Percent Solution and Mixture Problems 113 Kilowatt Determinations 114 Water Treatment Grade 2 Test 116 Solutions to Water Treatment Grade 2 Test 119 WATER TREATMENT GRADE 3 125 Volume Problems 127 Percent Determinations 128

 Detention Time Calculations 15 Pressure Problems 16 Density Calculations 17 Specific Gravity of Liquids 20 Flow Problems 21 Calculations of Chlorine Dose Demand and Residual 22 Pounds Removal Problems 34 Pump Discharge Problems 35 Pumping Calculations 37 Flow Rate Problems 40 Weir Overflow Rate Problems 41 Surface Loading Rate Calculations 42 Filtration Rate Problems 43 Unit Filter Run Volume Determinations 44 Calculations for Wells 45 Hardness Problems 47 Solution Percent Solution and Mixture Problems 48 Water Consumption 49 WATER TREATMENT GRADE 1 TEST 51 SOLUTIONS TO WATER TREATMENT GRADE 1 TEST 54 WATER TREATMENT GRADE 2 59 Temperature Conversion Problems 62 Percent and Parts per Million Conversion Problems 63 Percent Calculations 64 Average Calculations 66 Area Problems 67 Circumference Problems 68 Volume Problems 69 Watershed Supply Calculations 72 Detention Time Calculations 75 Pressure Problems 77 Density 78 Specific Gravity of Liquids 79 Flow Problems 80 Calculations of Chlorine Dose Demand and Residual 81 Dosage Problems 82 Pounds Removal Problems 95 Pump Discharge Problems 96 Pumping Calculations 98 Flow Rate Problems 102 Weir Overflow Rate Problems 104 Surface Loading Rate Calculations 105 Filtrations Rate Problems 106 Backwash Rate Calculations 107 Unit Filter Run Volume Determinations 108 Calculations for Wells 109
 Pressure Problems 129 Detention Time Problems 132 Dosage Problems 137 Ratio Calculations 153 Filtration Rate Problems 154 Backwash Rate Problem 159 Corrosion Problems 161 Softening Calculations 163 Calcium Hardness Calculations 166 Total Hardness As Expressed In Carbonated and Noncarbonate Hardness 170 Ion Exchange Softening Problems 173 Calculations for Chemical Precipitation Softening Process 177 Pounds Removal Problems 185 Flow Rate Calculations 189 Pumping Rate Calculations 195 Pumping Problems 199 Hydraulic Press Calculations 201 Water Treatment Grade 3 Test 204 Solutions to Water Treatment Grade 3 Test 207 CHAPTER 4 WATER TREATMENT GRADE 4 213 Pressure Problems 220 Detention Problems 222 Dosage Problems 226 Lime Dosage Problems 245 Solution Feed Rate Calculations 248 Pounds Removal Problems 251 Percent Solution Mixture Problems 254 Ion Exchange Softening Problems 267 Reverse Osmosis Recovery 272 Percent of Element in a Compound 274 Corrosion Problems 277 Calculations for Chemical Precipitation Softening Process 279 Calculations for Bicarbonate Carbonate and Hydroxide Alkalinity 287 Log Removal and CT Problems 291 Blending Calculations 307 Preparation of Standard Solutions 313 Jar Test Standards 317 Dillution Problems 319 Milliamp Signal Calculations 321 WATER TREATMENT GRADE 4 TEST 323 SOLUTION TO WATER TREATMENT 4 TEST 326 Appendixes 331 Bibliography 361 Additional Resources 363 Copyright