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 WWTP Bacteria and PFAS Regulations. This time you can test your knowledge about threats to lagoons and mechanical seals.
Wastewater Treatment Sample Question
What is the greatest threat to wastewater lagoons or pond dikes?
A. Warm overcast days
B. Rip-rap coverage
C. Trees and shrubs
D. Burrowing animals
Water Treatment Sample Question
How does lubricant water pass between the sealing faces of a mechanical seal when the pump is designed for low pressure and low rpm?
A. The use of a balanced seal
B. The use of an unbalanced seal
C. Mechanical seals do not allow water to pass between the sealing faces
D. Adjusting the packing gland controls the flow of the lubricant water between the sealing faces
To see answers for both of the above questions, click this link.
About the authors: Rick Lallish is the Water Pollution Control program director at the Environmental Resources Training Center 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.
