Here are the answers to the July 11, 2022 edition of TPO's Exam Study Guide:
While using sand beds to dry sludge, what is the probable cause of excessive odors when sludge is applied, and what is the best solution?
The answer to this question is C, inadequate digestion of sludge, and correct the digestion problem. While operating a sludge drying bed, the proper digestion of the sludge is very important before applying any sludge. Inadequately digested sludge will have offensive odors and will attract vectors such as flies. Properly digested sludge should have little to no odors when applied to the drying beds or taken to final land application. Understanding digester operations and sludge drying bed operations are very important for operators.
What assembly will protect the water main from a fire suppression system and identify illegal water usage from the fire suppression waterline?
The correct answer is D, RPDA. A cross-connection control program is one of the methods a public water supply uses to help protect the distribution system from contamination. Public water supplies are responsible for the quality of the water delivered to the end user, so identifying high risk connections and protecting the distribution system with backflow preventers is pertinent. Operators typically use the survey method to gather initial service connection information and site visits when necessary. The RPDA is equipped with a meter on the bypass line to detect leaks or unauthorized water usage.
