Wastewater Quiz with Correct Answer 2024

The term pathogenic means - Correct Answer Capable of causing disease Question: The minimum separation, between sewer lines, and potable water lines is A. 8 feet B. 9 feet C. 10 feet - Correct Answer B. 9 feet An important step, in testing a sample, for Total Suspended Solids is - Correct Answer Filtering a sample Biochemical oxygen Demand, (BOD) test is based on? - Correct Answer Measuring, the dissolved oxygen, used 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 Question: 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 Question: What is the preferred, hydraulic method of cleaning sewer lines - Correct Answer Answers: Hydro Jet Cleaning Question: what are some Ways, to reduce bad odors, generated in the collection system - Correct Answer Answer: Routinely cleaning, slow running, or low flow lines, adding chlorine, or hydrogen peroxide, to the collection system Question: what are some Types of pipe materials commonly found in wastewater collection system - Correct Answer Answer: ductile iron, Poly Vinyl Chloride, (PVC) vitrified clay pipe, fiberglass Question: before entering a confined space, a worker should perform, what procedures - Correct Answer Answer:have an approved monitoring device, and check, for the presence of dangerous gasses, ventilate, the space with a blower, wear a safety harness, and be attach to a life line A properly designed, and operated primary sedimentation tank, should remove what percent of incoming BOD. A.20% to 30%