Massachusetts Wastewater Practice Exam

The issue of plugging in feed lines when using line slurry is a well-known complication in wastewater management. Slurry, which is a mixture of solids and liquid, can create solid build-up within narrow or constricted feed lines, especially if the flow rate is insufficient or if the particulate matter is of a size that facilitates clumping. This plugging can hinder or completely stop the flow of material, leading to inefficient operation of the system, increased maintenance issues, and potential downtime.

Moreover, the physical properties of the slurry—such as viscosity, concentration, and the nature of the solids—can directly contribute to the likelihood of plugging. Managing these factors is crucial for maintaining an effective slurry system. By utilizing proper design and operational practices, such as appropriate line sizing and regular monitoring, operators can mitigate the risk of feed line plugging and ensure smoother operation of wastewater treatment processes.

Other options relate to problems that may arise, such as corrosion from the chemicals in the slurry or the physical integrity of the lines, but plugging is specifically tied to the flow dynamics and the characteristics of the slurry itself.