Texas Wastewater Class B Exam (Latest 2023/ 2024 Update) Questions and Verified Answers| 100% Correct | Grade A

Texas Wastewater Class B Exam (Latest 2023/ 2024 Update) Questions and Verified Answers| 100% Correct | Grade A Q: Ways to reduce bad odors coming from a collection system Answer: routinely cleaning slow running or low flow lines, adding chlorine or hydrogen peroxide to the collection system Q: Types of pipe that are commonly used in wastewater collection system Answer: ductile iron, Poly Vinyl Chloride (PVC) Q: Before entering a confined space a worker should Answer: Use approved monitoring device and check for the presence of dangerous gasses, ventilate the space with a blower, wear a safety harness and attach a life line Q: A properly designed and operated primary sedimentation tank should remove _____ percent of incoming BOD Answer: 30-40% Q: Devices that may be used to determine the level of sewage in a lift station Answer: air bubbler, floats, electrodes, Acoustic (sonic) Q: What is the most important role of aerobic bacteria in the treatment of wastewater? Answer: decompose organic matter Q: The hydraulic loading of a trickling filter may be determined by Answer: flow rate and filter area Q: These can be used to dewater sludge Answer: belt press, drying beds, solid bowl centrifuge, gravity thickener Q: Most important to providing adequate sewage treatment in a stabilization pond Answer: sunlight, algae, bacteria and time Q: Offensive and objectionable odors which sometimes occur in trickling filters usually indicate Answer: septic conditions are present Q: Dissolved Oxygen (DO) in aeration tank of an activated sludge plant should be maintained at or about Answer: 2 to 4 mg/L Q: Contributes to the infiltration in a collection system Answer: breaks in the main lines, high ground water levels, heavy rains, hydro jet cleaning plugged mains Q: When a centrifuge pump loses prime the Answer: pump is no longer moving liquid Q: A Rotating Biological Contactor (RBC) is Answer: fixed firm biological treatment process Q: Needs to be checked regularly to properly operate an activated sludge treatment plant Answer: aeration equipment and mixed liquor solids Q: Point source discharges are Answer: discharges that come from pipes or ditches that are monitored, controlled and inspected Q: Non-point discharges are Answer: discharges that have intermittent, dispersed flows having little or no control Q: The Texas Water Code establishes the protection of water quality and quantity of the state by Answer: setting stream standards, issues permits for discharges, identifies non-point source controls, and establishes water reuse. Q: The wastewater plant operator is primarily responsible for Answer: treating wastewater discharged into the community Q: Chapter ___ of the Texas Water Code is the state law controlling water pollution and ___ authority to control discharges in Texas Answer: Chapter 26 and Texas Commission of Environmental Quality