WATER DISTRIBUTION OPERATOR PRACTICE EXAM 2023 WITH 100% CORRECT ANSWERS

Which device measures the hydrogen ion activity in a solution? PH Meter What is the purpose of a shaft sleeve in a centrifugal pump? Protects the sleeve from damage What is a nutating disc Type of water meter for small diameter domestic service what will happen to a steel pipe if the water has low PH? Corrode ___________________is a disinfection by product precursor Natural organic matter One of the requirements of the Lead and Copper Rule is for water systems to_____________if the action levels for lead or copper are exceeded (Based on 90th percentile of tap water samples) Install corrosion control If chlorine was added to water but there is no chlorine residual, which statement is true? Chlorine demand has not been met Which of the following is a parasite and microbiological contaminant? Giardia What can be used to control scaling, but can never be used to control corrosion? Sequestering Most regulated contaminants in drinking water? Only cause health effects after long term exposure What is the only MCL that varies with the temperature? Fluoride According to the Surface Water Treatment Rule, water systems serving a population of more than 500 persons must sample the filtered water for turbidity every? Every Four Hours The proper emergency kit for a TON chlorine cylinder is? Kit B The Surface Water Treatment Rule requires that disinfectant residuals be collected at the same location in the distribution system as? Samples tested for Coliforms What is the minimum separation for an Air Gap? 1" The middle layer is a reservoir is? Metalimnion. Also called the thermocline