CWEA Maintenance Technologist Practice Test 2025 – Complete Exam Prep

The primary function of grit chambers in wastewater treatment is to remove heavy particles and grit from the incoming flow. These chambers are designed to allow heavier materials, such as sand, gravel, and other inorganic particles, to settle out of the wastewater as it flows through. By removing these heavy particles, grit chambers help prevent damage to subsequent treatment equipment and processes, such as pumps and aeration systems. This initial step is crucial for ensuring that the treatment plant operates efficiently and effectively, as it eliminates materials that could interfere with biological treatment processes.

Other options, while relevant to wastewater treatment, do not accurately describe the primary function of grit chambers. For example, while aeration is important for biological treatment, it is not a function of grit chambers. Similarly, equalizing flow rates is typically managed by other systems in a treatment plant, and while grit removal can lead to better downstream processes, it does not enhance biological treatment directly.