TEXAS WASTEWATER CLASS B FINAL EXAM STUDY GUIDE 2025/2026 COMPLETE QUESTIONS AND CORRECT DETAILED ANSWERS WITH RATIONALES || 100% GUARANTEED PASS RECENT VERSION

TEXAS WASTEWATER CLASS B FINAL EXAM STUDY GUIDE 2025/2026 COMPLETE QUESTIONS AND CORRECT DETAILED ANSWERS WITH RATIONALES || 100% GUARANTEED PASS RECENT VERSION 1. The name of the State Agency responsible for enforcing pollution control laws in Texas - ANSWER Texas Commission of Environmental Quality 2. The term pathogenic means - ANSWER Capable of causing disease 3. The minimum separation between sewer lines and potable water lines is - ANSWER 9 feet 4. A licensed wastewater operator is a professional - ANSWER consistently does best job possible, practices personal safety, strives to improve job knowledge, strives to keep the plant and collection system in the best appearance and working order 5. An important step in testing a sample for Total Suspended Solids is - ANSWER Filtering a sample 6. The Biochemical oxygen Demand (BOD) of a sample is based on - ANSWER Measuring the dissolved oxygen (DO) used 7. The results of Biochemical Oxygen Demand (BOD) sample taken at a treatment plant tells the operator - ANSWER How the plant was operating 5 days ago 8. Which of the following are dangerous gasses that are likely to be present in lift stations and manholes? - ANSWER Natural gas, gasoline fumes, hydrogen sulfide and carbon dioxide 9. A preferred hydraulic method of cleaning sewer lines is - ANSWER Hydro Jet Cleaner 10. 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 11. Types of pipe that are commonly used in wastewater collection system - ANSWER ductile iron, Poly Vinyl Chloride (PVC) 12. 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 13. Common operating problems with a trickling filter include - ANSWER Ponding, Filter files, Odors, Clogging of Nozzles, & Snails 14. Wastewater Stabilization Ponds are an approved process for wastewater treatment. Organic loading of Stabilization Ponds is typically - ANSWER 35 lbs BOD/Acre/Day with a minimum of 30 days detention time 15. Wastewater Stabilization Ponds work through a complex process which includes - ANSWER Sunlight, Oxygen, Nutrients, Algae, and Bacteria 16. Facultative Lagoons have two zones of treatment - ANSWER an aerobic surface layer and an anaerobic bottom layer 17. Typically one could expect ____ % BOD removal in a Facultative Lagoon - ANSWER 50 18. Aerated Lagoons rely on ______ to provide ____and _____ - ANSWER Mechanical aeration/ Aeration & mixing 19. The most common method of dewatering and drying sludge is - ANSWER drying bed 20. Digester gas typically contains about ________%_______ - ANSWER 65-75% methane 21. The depth of sludge drawn to a drying bed should be - ANSWER Approximately 9 inches 22. Newly hired personnel have _________to become licensed. - ANSWER 1 year 23. Force Mains and fittings must have a pressure rating of at least - ANSWER 150 psi 24. Most pumping stations and electrical equipment used today in wastewater collection or treatment is ________ and typically either _______ or _________ volts - ANSWER A.C. (Alternating Current) & 220 or 440 and in some cases A.C. (Alternating Current) & 100 or 208 25. To avoid electrical shock, the operator should ________ if they are experiencing equipment failures or power related issues - ANSWER Refer the problem to a trained electrical repairperson and do not attempt to check fuses or open the disconnect box and Notify the power provider and let them send out a serviceman to assure the problem is not on the provider's side. 26. When using Hydraulic Hydro Jetting sewer cleaning equipment the operator will want to go from a _______ manhole and clean toward the stoppage to avoid _________. - ANSWER Clear or open / Forcing sewage into customer homes or businesses 27. The Activated Sludge Process can produce a high degree of treatment. Typically one could expect a ______to_______% BOD removal - ANSWER 90 to 99% 28. The Activated Sludge plant has five (5) Critical Components. They are - ANSWER Oxygen supply, Aeration tanks, Clarifiers, Return & Waste 29. The Activated Sludge process is an ________process. - ANSWER Aerobic 30. In the activated sludge process aeration tanks provide the space necessary to _______, ________, & _______ and return biological solids. - ANSWER Mix, aerate, & Hold Influent 31. In the active sludge process, Utilization is the process where - ANSWER Food supply is changed into a liquid state for use 32. In the activated sludge process, Stabilization is - ANSWER Wastes biologically converted to water, carbon dioxide, or new cells 33. In the activated sludge process, the _______ is called the heart of the activated sludge process. - ANSWER Clarifier 34. In the activated sludge process, factors that will influence the operation of the final clarifier are - ANSWER Loading, solids applied, settling, thickness of solids, rate of return & Wasting 35. In the activated sludge process, the clarifier will concentrate return sludge and waste sludge about ___ to__ times the solids concentration of the mixed liquor - ANSWER two (2) to four (4) 36. In the activated sludge process, for the clarifier to do its job, the ____ must be retained long enough to allow ______ to settle and liquid to rise. - ANSWER water/ solids 37. In the activated sludge process, as more mixed liquor flows to the clarifier, the thickness of the sludge blanket will - ANSWER Increase as solids accumulate 38. In the activated sludge process, biological solids from the bottom of the clarifier must be returned to the aeration basin for re-seed. This process is accomplished by - ANSWER Air lift pumps, centrifugal pumps, Diaphragm pumps, Screw pumps & Gravity Flow