Grade 2 Wastewater Treatment Operator Practice Exam (Complete with questions and correct answers) 2024/2025

Grade 2 Wastewater Treatment Operator Practice Exam (Complete with questions and correct answers) 2024/2025 1 mg/l is the same as 1 part per billion - CORRECT ANSWER-F A scada system is capable of monitoring and controlling equipment from where? - CORRECT ANSWER-remote location A Discharge Monitoring Report is typically submitted to the regulatory agency on daily basis - CORRECT ANSWER-False = Monthly A mechanical seal is used to prevent leaks between where? - CORRECT ANSWERbetween the pump casing and shaft Alkalinity is the capacity of a liquid to neutralize base - CORRECT ANSWER-False = Alkalinity neutralizes acids Typical mixed liquor suspended solids concentration is? - CORRECT ANSWER-1,000 to 4,500 mg/l Turbidity is caused by... - CORRECT ANSWER-suspended matters Algae is not essential to the successful operation of both aerobic and facultative ponds - CORRECT ANSWER-False = Algae supply most of the oxygen to the supernattant The addition of acid and CO2 will do what to wastewater? - CORRECT ANSWER-lower the pH of wastewater Hydrogen sulfide will deteriorate what kind of structures? - CORRECT ANSWERconcrete structures The higher the pH, the better the disinfection - CORRECT ANSWER-False = Maintain a dissolved oxygen concentration of 12 to 14 mg/l in the aeration tank - CORRECT ANSWER-F What happens when the velocity of the wastewater in a clarifier is greater in some sections than others? - CORRECT ANSWER-short circuiting The F/M ratio will decrease when the microorganism population____________in the aeration tank? - CORRECT ANSWER-increases