This study guide is a companion to the seventh edition of Operation of Water Resource Recovery Facilities, MOP 11. The manual and study guide can be used for training classes, studying for certification exams, and improving the quality of operations within the facility or firm. As with the latest edition of MOP 11, this study guide reflects the state of the art coverage in water resource recovery facility management and operation. The questions emphasize principles of treatment, facility management, troubleshooting, and preventive maintenance.The Operation of Water Resource Recovery Facilities Study Guide contains challenging questions and detailed solutions to help you with continuing education as well as on the job demands. A list of symbols and acronyms, conversion factors, and a glossary are also included. These questions can be used to help develop advanced knowledge and ensure that your water resource recovery facility is fulfilling its mission of environmental protection.