A peristaltic pump is a small positive displacement pump commonly used for sampling and chemical addition.

• A. True
• B. False
• C. Not used for sampling
• D. Requires high maintenance

Answer: (A)

Peristaltic pumps are small positive displacement devices that move fluid by squeezing a flexible tubing with rotating rollers. This design delivers a precise, repeatable volume with each revolution, which makes them well-suited for sampling and for dosing precise amounts of chemicals in wastewater work. Because the fluid only contacts the tubing, they offer good chemical compatibility and make changing samples or reagents quick and clean, with relatively simple maintenance focused on replacing the tubing and rollers.

So, the statement is true: a peristaltic pump fits the description as a small positive displacement pump commonly used for sampling and chemical addition. The alternative ideas don’t fit because this pump type is indeed used for sampling, is not inherently high-maintenance, and is appropriately categorized as a small positive displacement pump.