Tennessee Wastewater Operator Practice Exam

Which type of container is recommended for conducting the settleometer test?

1. Standard beaker

2. Municipal settleometer

3. Mallory settleometer

4. Plastic sample jar

The correct answer is: Mallory settleometer

The Mallory settleometer is specifically designed for conducting settleometer tests, which measure the settling rate of particles in wastewater. This apparatus features a graduated cylinder that allows for precise measurement of the settled volume of solids over time. The design and functionality of the Mallory settleometer facilitate a more accurate assessment of the sedimentation process compared to other types of containers. While a standard beaker or plastic sample jar may hold liquid samples, they do not provide the necessary specifications for accurately tracking the performance of the settleometer test. Similarly, a municipal settleometer might be designed for specific municipal uses but lacks the standardized characteristics and precision that make the Mallory settleometer the preferred choice in a laboratory setting. Thus, the Mallory settleometer stands out as the best option for effectively conducting the test and obtaining reliable results.