Exam Study Guide: Collections System Failure and CT Value

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.

Exam Study Guide: Collections System Failure and CT Value

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 Equipment and Fire Hydrant Flow Rates. This time you can test your knowledge about collections system failure, and CT Value

Wastewater Treatment Sample Question

Conditions recognized as major operating problems causing poor performance or failure of collections systems are known as what?

A. Industrial discharges 
B. Peripheral lateral discharges
C. Inflow and infiltration
D. Fouled lift-stations

Water Treatment Sample Question

What does the CT value represent in water treatment?

A. How smooth the inner wall is on a piece of pipe
B. A measure of how effective a disinfectant is in pathogenic inactivation 
C. The size of particle passing through a particle counter
D. The electrical charge of a coagulant

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.


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