Advanced Water Operator Test Questions and Answers

1 ½ times normal pressure up to 150 pounds, whichever is greater. - Answer-When pressure testing a new line how much pressure do you add? Incomplete form Not enough sample Silt or slime in bottle Positive e-coli - Answer-What would cause a repeat Bac T sample? lower area of water - Answer-What area is the Hypolimnion in water NSF standard. - Answer-Bleach has to meet what standard Lagoons - Answer-What is number one sludge removal process in Texas? RO and Nanofiltration - Answer-Which two membranes remove the most NTU? Calcium and Magnesium - Answer-Lime and Soda Ash is used for removing? Releases CO2 which helps keep hardness in solution. - Answer-What function does aeration serve in the Lime Soda Ash softening process? Cationic polymers. - Answer-What can replace primary coagulation? Humic and Fulvic - Answer-Trihalomethanes are formed when chlorine reacts with what two acids in water? Alkalinity - Answer-What chemical analysis deals with changes in color at a pH of either 4.5 or 8.3? Alkalinity and pH. - Answer-What laboratory test is the most significant for establishing chemical dosage for coagulating water? Turbidity, pH, and temperature. - Answer-Coagulation is affected by: influencing coagulation. - Answer-pH is the single most important factor in pH. - Answer-Soda Ash is used in the water treatment process to adjust 2-4 gpm/ft2. - Answer-The maximum flow rate through a sand filter is 35 psi - Answer-Minimum pressure in distribution system.