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 Volatile Solids Calculations and Bacteriological Sampling. This time you can test your knowledge about waste gas burners and identifying blown fuses.

Wastewater Treatment Sample Question

What color is the waste gas burner on a properly operating anaerobic digester with an approximate mixture of methane 68% and carbon dioxide 32%?

A. Red 
B. Orange
C. Blue
D. Green

Water Treatment Sample Question

What tool and setting would an operator use to identify a blown fuse?

A. Megger/voltage
B. Megger/amperage
C. Volt-ohm-meter/amperage
D. Volt-ohm-meter/continuity 

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

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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.