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 MBR Layouts; and Chlorine Cylinder Storage. This time you can test your knowledge about the settleable solids test, and confined spaces.
Wastewater Treatment Sample Question
To perform the settleable solids test, what piece of equipment is used?
A. Settleometer
B. Turbidimeter
C. Erlenmeyer flask
D. Imhoff cone
Water Treatment Sample Question
What criteria determines if a space is classified as confined?
A. The space has limited means of entry and exit, the space is not designed for continuous occupancy, and the space is of a size and configuration that it can be entered to perform work.
B. The space has permanent entry and exit points, the space is designed for continuous occupancy, and the space is of a size and configuration that it can be entered to perform work.
C. The space is exposed to extreme temperatures, the space is designed to hold only one person, and the space is below grade.
D. The space is exposed to open atmosphere, the space is designed to hold only one person, and the space is located in a remote location.
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.
