TEXAS WASTEWATER CLASS B NEWEST ACTUAL EXAM COMPLETE 180 QESTIONS AND CORRECT DETAILED ANSWERS (VERIFIED ANSWERS) |ALREADY GRADED A+

1. The name of the State Agency responsible for enforcing pollution control laws in Texas - Texas Commission of Environmental Quality 1. The term pathogenic means - Capable of causing disease 2. The minimum separation between sewer lines and potable water lines is - 9 feet 3. A licensed wastewater operator is a professional - 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 4. An important step in testing a sample for Total Suspended Solids is - Filtering a sample 5. The Biochemical oxygen Demand (BOD) of a sample is based on - Measuring the dissolved oxygen (DO) used 6. The results of Biochemical Oxygen Demand (BOD) sample taken at a treatment plant tells the operator - How the plant was operating 5 days ago 7. Which of the following are dangerous gasses that are likely to be present in lift stations and manholes? - Natural gas, gasoline fumes, hydrogen sulfide and carbon dioxide 8. A preferred hydraulic method of cleaning sewer lines is - Hydro Jet Cleaner 9. Ways to reduce bad odors coming from a collection system - routinely cleaning slow running or low flow lines, adding chlorine or hydrogen peroxide to the collection system 10.Types of pipe that are commonly used in wastewater collection system - ductile iron, Poly Vinyl Chloride (PVC) 11.Before entering a confined space a worker should - 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 12.A properly designed and operated primary sedimentation tank should remove _____ percent of incoming BOD - 30-40% 13.Devices that may be used to determine the level of sewage in a lift station - air bubbler, floats, electrodes, Acoustic (sonic) 14.What is the most important role of aerobic bacteria in the treatment of wastewater? - decompose organic matter 15.The hydraulic loading of a trickling filter may be determined by - flow rate and filter area 16.These can be used to dewater sludge - belt press, drying beds, solid bowl centrifuge, gravity thickener 17.Most important to providing adequate sewage treatment in a stabilization pond - sunlight, algae, bacteria and time 18.Offensive and objectionable odors which sometimes occur in trickling filters usually indicate - septic conditions are present 19.Dissolved Oxygen (DO) in aeration tank of an activated sludge plant should be maintained at or about - 2 to 4 mg/L 20.Contributes to the infiltration in a collection system - breaks in the main lines, high ground water levels, heavy rains, hydro jet cleaning plugged mains 21.When a centrifuge pump loses prime the - pump is no longer moving liquid 22.A Rotating Biological Contactor (RBC) is - fixed firm biological treatment process 23.Needs to be checked regularly to properly operate an activated sludge treatment plant - aeration equipment and mixed liquor solids 24.Point source discharges are - discharges that come from pipes or ditches that are monitored, controlled and inspected 25.Non-point discharges are - discharges that have intermittent, dispersed flows having little or no control 26.The Texas Water Code establishes the protection of water quality and quantity of the state by - setting stream standards, issues permits for discharges, identifies non-point source controls, and establishes water reuse. 27.The wastewater plant operator is primarily responsible for - treating wastewater discharged into the community 28.Chapter ___ of the Texas Water Code is the state law controlling water pollution and ___ authority to control discharges in Texas - Chapter 26 and Texas Commission of Environmental Quality 29.The Texas Commission on Environmental Quality can revoke an operator's license if the operator - causes permit violation, falsifies records or neglects their duty 30.If accidental discharge, bypass, or spill (SSO) of wastewater occurs the responsible party MUST notify TCEQ regional offices within ____ hours - 24 31.Aerobic Bacteria require_____ in the water for their metabolism - oxygen 32.Anaerobic Bacteria _____ live with O2 present in the water for their metabolism - cannot 33.Facultative Bacteria require__________in the water for their metabolism - either aerobic or anaerobic conditions 34.Chemical characteristics of sewage include - solids, greases, dissolved oxygen, O2 Demand, pH, and gasses 35._________removes Total Suspended Solids (TSS) - filtration 36.Inorganic solids include - sand, grit and minerals 37.Organic solids include - organic materials from plants, animals or humans 38.A good plant influent pH is about - 7.2 39.Dangerous gases are produced during bacterial decomposition of organics in wastewater. The main gasses are - Hydrogen sulfide, carbon dioxide and methane 40.The majority of Dissolved Oxygen in raw sewage comes from - Potable Drinking Water 41.Each person contributes approximately ______ lbs of BOD to the system daily. - 0.17 42.Sources of waste water include - domestic, storm water, commercial, food processing, agricultural and industrial 43.A sewer manhole provides access into the system for cleaning or service. A manhole is located - at changes in alignment, diameter, grade, direction and intersection