Exam Study Guide: Lagoon Types; and Rate of Flow Controllers

Maintaining your education is important, especially in a career that demands licensing exams. Prove you’re an expert operator by answering these questions and others from our Exam Study Guide Series.

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 Pumping Heavy Sludge; and Slow Sand Gravity Filters. This time you can test your knowledge about lagoon types, and rate of flow controllers.

Wastewater Treatment Sample Question

What is the most common type of lagoons currently in use to treat municipal wastewater?

A. Anaerobic lagoons
B. Aerated lagoons
C. Polishing lagoons
D. Facultative lagoons

Water Treatment Sample Question

What is the purpose of a rate of flow controller on a gravity filter?

A. Gradually close as the headloss increases during a filter run
B. Gradually close as the headloss decreases during a filter run
C. Gradually open as the headloss increases during a filter run
D. Gradually open as the headloss decreases during a filter run

To see the answers to both the above questions, click this link.


About the authors: Rick Lallish is the Water Pollution Control program director at the Environmental Resources Training Center (ERTC) of Southern Illinois University Edwardsville. He provides training for entry-level operators in the wastewater field and operators throughout the state looking to further their education. Lallish was also named the 2017 Illinois Operator of the Year and 2018 president of the Illinois Association of Water Pollution Control Operators.

Drew Hoelscher is the program director of drinking water operations at the Environmental Resources Training Center in Edwardsville, Illinois.



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