Water Distribution Operator Practice Exam 3 Ken Tesh Correct 100%

WATER DISTRIBUTION OPERATOR PRACTICE EXAM 3 KEN TESH Correct 100%Which device measures the hydrogen ion activity in a solution? - ANSWER PH Meter What is the purpose of a shaft sleeve in a centrifugal pump? - ANSWER Protects the sleeve from damage What is a nutating disc - ANSWER Type of water meter for small diameter domestic service what will happen to a steel pipe if the water has low PH? - ANSWER Corrode ___________________is a disinfection by product precursor - ANSWER 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) - ANSWER Install corrosion control If chlorine was added to water but there is no chlorine residual, which statement is true? - ANSWER Chlorine demand has not been met Which of the following is a parasite and microbiological contaminant? - ANSWER Giardia What can be used to control scaling, but can never be used to control corrosion? - ANSWER Sequestering Most regulated contaminants in drinking water? - ANSWER Only cause health effects after long term exposure What is the only MCL that varies with the temperature? - ANSWER 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? - ANSWER Every Four Hours The proper emergency kit for a TON chlorine cylinder is? - ANSWER Kit B