The Wastewater Operator Treatment 2 Final Exam 2024/2025

The Wastewater Operator Treatment 2 Final Exam 2024/2025 Liftstations at a treatment plant or those which discharge directly to a treatment plant with an average flow greater than 0.1 MGD shall have three or more pumps or have automatically controlled variable capacity pumps, these pumps should be adjusted to actual flow conditions and controlled to operate so as to: - CORRECT ANSWERMinimize surges in the treatment in the treatment units. In the contact stabilization system of activated sludge treatment, the detention time in the contact zone is designed be _______ other types of activated sludge treatment. - CORRECT ANSWER-shorter than According to current TCEQ wastewater operator certification rules, an operator can renew a Class D Wastewater Treatment Plant Operator if he or she: A) Works only in a collection system B) Is an operator at an activated sludge plant C) Is an operator at a trickling filter treatment facility with a permitted daily average flow of 0.15 MGD. D) Both A and C. E) None of the Above - CORRECT ANSWER-None of the Above If a Leak is suspected in an off-line, back-up, one-ton chlorine cylinder, after putting on proper safety equipment, the operator should first: - CORRECT ANSWER-Call appropriate emergency response personnel. The definition of an oxygen-deficient atmosphere is one that contains less than ________ percent oxygen. - CORRECT ANSWER-19.5 A combustible atmosphere: - CORRECT ANSWER-contains oxygen and flammable gas, vapor, or dust All of the following EXCEPT ________ are damaging or irritating to the mucus membranes or lungs if inhaled: A) Ozone B) Lime Dust C) Chlorine Gas D) Carbon Dioxide E) Ferric Chloride Dust - CORRECT ANSWER-Ozone The Sludge Volume Index (SVI) is: - CORRECT ANSWER-the volume of settled sludge (30-minutes) in ml/L times 1000, divided by the concentration in mg/L of MLSS. Biomonitoring - CORRECT ANSWER-Involves the use of aquatic life to test the toxicity of a wastewater treatment plant effluent. A 24-Hour composite sample was tested for chlorine residual and found to contain none. These results indicate that: - CORRECT ANSWER-Residual chlorine was NOT present during the 24-hour period.