Wastewater Class B Texas || with Complete Solutions.

The name of the State Agency responsible for enforcing pollution control laws in Texas correct answers Texas Commission of Environmental Quality The term pathogenic means correct answers Capable of causing disease The minimum separation between sewer lines and potable water lines is correct answers 9 feet A licensed wastewater operator is a professional correct answers 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 An important step in testing a sample for Total Suspended Solids is correct answers Filtering a sample The Biochemical oxygen Demand (BOD) of a sample is based on correct answers Measuring the dissolved oxygen (DO) used The results of Biochemical Oxygen Demand (BOD) sample taken at a treatment plant tells the operator correct answers How the plant was operating 5 days ago Which of the following are dangerous gasses that are likely to be present in lift stations and manholes? correct answers Natural gas, gasoline fumes, hydrogen sulfide and carbon dioxide A preferred hydraulic method of cleaning sewer lines is correct answers Hydro Jet Cleaner Ways to reduce bad odors coming from a collection system correct answers routinely cleaning slow running or low flow lines, adding chlorine or hydrogen peroxide to the collection system Types of pipe that are commonly used in wastewater collection system correct answers ductile iron, Poly Vinyl Chloride (PVC) Before entering a confined space a worker should correct answers 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 A properly designed and operated primary sedimentation tank should remove _____ percent of incoming BOD correct answers 30-40% Devices that may be used to determine the level of sewage in a lift station correct answers air bubbler, floats, electrodes, Acoustic (sonic) What is the most important role of aerobic bacteria in the treatment of wastewater? correct answers decompose organic matter The hydraulic loading of a trickling filter may be determined by correct answers flow rate and filter area