Wastewater Class B Texas Questions and Answers

The name of the State Agency responsible for enforcing pollution control laws in Texas - Correct Answer Texas Commission of Environmental Quality The term pathogenic means - Correct Answer Capable of causing disease The minimum separation between sewer lines and potable water lines is - Correct Answer 9 feet A licensed wastewater operator is a professional - Correct 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 An important step in testing a sample for Total Suspended Solids is - Correct Answer Filtering a sample The Biochemical oxygen Demand (BOD) of a sample is based on - Correct Answer Measuring the dissolved oxygen (DO) used The results of Biochemical Oxygen Demand (BOD) sample taken at a treatment plant tells the operator - Correct Answer 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 Answer Natural gas, gasoline fumes, hydrogen sulfide and carbon dioxide A preferred hydraulic method of cleaning sewer lines is - Correct Answer Hydro Jet Cleaner Ways to reduce bad odors coming from a collection system - Correct Answer 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 Answer ductile iron, Poly Vinyl Chloride (PVC) Before entering a confined space a worker should - Correct 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 A properly designed and operated primary sedimentation tank should remove _____ percent of incoming BOD - Correct Answer 30-40%