Here are the answers to the Aug. 13, 2020 edition of TPO's Exam Study Guide:

1. Typically, activated sludge processes maintain their operating parameters, what two variables impact the performance process and must be monitored?

The answer to this question is B. If the upstream and downstream processes run as desired, the activated sludge process may be controlled to meet objectives, including producing floc-forming bacteria, managing the activated sludge (F/M), maintaining healthy settleability in the secondary clarifier. Any disruption in the upstream or downstream process can impact the activated sludge process in many ways. Understanding these processes are key points for the operator to maintain his or her facility and meet NPDES requirements.

2. Replacing old piping in the distribution system with new 140+ C Factor piping will:

The correct answer is C. Many potable water utility companies have pipe replacement programs to ensure the delivery of water is satisfactory for the customer and utility. A few reasons why distribution piping is replaced may be due to repairing or avoiding main breaks, corroded pipe, water quality issues or increasing hydrant flow. Newly installed distribution water pipe will have a higher C Factor, which represents the smoothness of the interior walls of the pipe. This increase in C Factor reduces the amount of obstructions the water will come in contact with as it flows through the pipe. Fewer obstructions results in less friction loss and more of a laminar flow pattern.


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