This document contains the full set of CWEA (California Water Environment Association) Collection System Maintenance (CSM) Grade 2 practice test questions with complete solutions. It covers key exam topics such as sanitary sewer overflows (SSO), sewer system management plans (SSMP), confined space safety, hydraulic and mechanical cleaning methods, pipe materials, manholes, pumps, traffic control, OSHA and Cal/OSHA regulations, and wastewater collection system operations. The material is structur...