Wastewater Practice exam all possible Questions and Answers 2024/2025 Complete

Wastewater Practice exam all possible Questions and Answers 2024/2025 Complete When organic wastes are discharged to receiving waters, O2 is depleted by _____. bacteria Hydrogen sulfide gives off an odor similar to____. rotten eggs 3 diseases potentially carried by wastewater are _____. typhoid fever, disentery, cholera Immediate first aid for butrns is to ____. flood with cold water What most likely causes an electic motor failure? mopisture What mixed liquor characteristics indicate a healthy activated sludge process? brown color, frothy appearance, and musty odor T/F: Algae is a plant life necessary for the proper functioning of a stabilization or oxidation pond. True Chlorine gas is ? heavier than air T/F: The highest concentration of algae growth in a facultative lagoon is usually observed near the top. True Common hydraulic detention times for primary clarifiers range from ____ hours 2 - 3 hours T/F: Methane is produced in an anaeroibic digester and can be used as a fuel? True T/F: The rock in a trickling filter is usually placed on a tile underdrain system. True What is the purpose of heating and mixing a primary anaeroibic digester? to increase the digestion rate T/F: Exhaust from a chlorinator room should be taken form floor level. True T/F: Chlorine residual may be determined using the reagent _____ diethyl-p-phenylene diamine (DPD) What test is typically never performed on wastewater influent? fecal coliform Considering the layout and flow diagram for the complete treament plant, oxidation ditch plants would be most similar to _____? extended aeration The pressure against which a pump must operate is measured in terms of _____ kPA (psi) T/F: Assuming aa constant suction head, the discharge of a centrifugal pump decreases with an increase in discharge head. True