Exam Study Guide: Laboratory Equipment and Fire Hydrant Flow Rates

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: Laboratory Equipment and Fire Hydrant Flow Rates

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 Soil Amendment Regulations and the UCMR 5. This time you can test your knowledge about laboratory equipment and fire hydrant flow rates.

Wastewater Treatment Sample Question

What piece of laboratory equipment is used to determine settleable solids?

A. Crucible
B. Settleometer 
C. Imhoff cone
D. Filter 

Water Treatment Sample Question

What gallon-per-minute flow can an operator expect if the bonnet on a fire hydrant is painted blue?

A. 1,500-plus gpm
B. 1,000 to 1,499 gpm
C. 500 to 999 gpm
D. Less than 500 gpm

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 (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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