Welcome back to TPO magazine's Exam Study Guide Series, which offers a pair of water/wastewater study questions with in-depth explanations of the answers. Last time, we covered a set of wastewater and drinking water treatment questions on the topics of Rotating Biological Contactors and PFAS MCLs. This time you can test your knowledge about sewer velocity and incubator temperatures.
Wastewater Treatment Sample QuestionA ping-pong ball travels from manhole A to manhole B 200 feet away in 1.5 minutes. The sewer line is a 6-inch sewer main. The line is running full. What is the velocity in this sewer main? Bonus - Is it within recommended speed?
A. 0.9
