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AWWA Water Operator Certification Exam Prep with Questions and Answers

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AWWA Water Operator Certification Exam Prep with Questions and Answers What percentage of source water turbidity do sedimentation basins typically remove? ANSWER 90% or more How many zones are defined in all sedimentation basins? ANSWER 4 Which sedimentation zone is particularly affected by the other zones? ANSWER Settling zone The material that accumulates on the surface of a dissolved-air flotation unit is called ANSWER float Destruction of pathogenic organisms by chlorine is directly related to? ANSWER Chlorine concentration and contact time. The valves on chlorine cylinders and ton containers must comply with standards set by? ANSWER Chlorine Institute. Packing replacement is done when? ANSWER No further tightening can be done on the packing gland. Chlorine dioxide is_____in the_____and_____. ANSWER Stable, absence of light, elevated temperatures.

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