Exam Study Guide: MBR Layouts; and Chlorine Cylinder Storage

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 Laboratory Procedures; and Dissolved Oxygen Concentration. This time you can test your knowledge about MBR layouts, and chlorine cylinder storage.

Wastewater Treatment Sample Question

Membrane Bioreactors (MBR’s) are becoming a viable option for retrofitted waste treatment facilities or built from ground up facilities. What are the two types of MBR layouts commonly used?

A. Inward and Outward
B. Sidestream and Inline (submerged)
C. Aerobic and Anaerobic
Microfiltration and Ultrafiltration

Water Treatment Sample Question

What is most likely to occur if a chlorine cylinder is stored in a room containing temperatures near 160 degrees Fahrenheit?

A. The fusible plug(s) will melt to prevent any release of chlorine
B. The fusible plug(s) will melt allowing chlorine gas to escape
C. The chlorine feed rate will drastically decrease due to lack of internal pressure
D. The chlorine inside the cylinder will only be in liquid form.

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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