Exam Study Guide: Pump and Motor Misalignment and Flow Rate Calculations

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: Pump and Motor Misalignment and Flow Rate Calculations

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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 Shoring Depth and Stuffing Box Leakage. This time you can test your knowledge about pump and motor misalignment and flow rate calculations.

Wastewater Treatment Sample Question

When connecting a pump and a motor, what are the two types of misalignment?

A. Polarity and conduction
B. Linear and polar
C. Parallel and angular
D. Vertical and horizontal

Water Treatment Sample Question

Water is being pumped from a finished water storage basin at a rate of 275 gpm. The basin is 60 feet long, 30 feet wide, and 18 feet deep. What is the gpm flow rate into the basin, and how long will it take to fill, if the water level is currently at 11 feet and rising 18 inches every hour?

A. 336.6 gpm, 12 hours
B. 275 gpm, 12 hours
C. 611.6 gpm, 4.7 hours
D. 275 gpm, 4.7 hours

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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