California Wastewater Treatment Operator Practice Exam 2025 – All-in-One Guide to Master Your Certification

The correct choice highlights essential components that are commonly found in a wastewater treatment plant. Screens are utilized to remove large debris and solids from influent wastewater, which helps protect downstream equipment from damage and clogging. Clarifiers are critical for separating solid and liquid phases, allowing suspended solids to settle to the bottom, thus clarifying the effluent. Aeration basins play a significant role in biological treatment processes where microorganisms break down organic matter in the wastewater, and oxygen is supplied to promote this activity.

These components are foundational to the treatment process, as they facilitate the removal of pollutants and help ensure that the treated water meets regulatory standards before being discharged or reused. While the other options contain components that may be found in various industrial settings or support systems, they do not represent the core functionalities and processes directly involved in wastewater treatment.