Exam Study Guide: Positive Displacement Meters

Exam Study Guide: Positive Displacement Meters

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When faced with a licensing exam, don't struggle with test anxiety! Use the question below and others from our Exam Study Guide series to study and prepare for exam questions. Take a look at this sample water treatment licensing question along with an explanation of the correct answer.

Sample question:

Positive displacement meters will usually:

A) Over-register and cause for a high water bill
B) Not last more than 1 year
C) Be installed above ground level
D) Underregister as the meter ages and becomes worn

Answer: When a customer receives a high water bill, that customer might request a new meter because he believes the water meter is malfunctioning. This might cause for an even higher water bill because positive displacement meters will almost always underregister. As a positive displacement meter ages it might not register low flows. Most high water bills are from a leaking toilet or faucet.

So, the correct answer is D.

Reference: Water Distribution Operator Training Handbook. 3rd Edition, American water Works Association. Page 153

About the author
Drew Hoelscher is the program director of drinking water operations at the Environmental Resources Training Center (ERTC) in Edwardsville, Illinois.


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