Wastewater Operator (class 1) 100% Pass

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Wastewater Operator (class 1) 100% Pass What is the most common reason for a wastewater to contain intermittent large amounts of sand, gravel, and grit? ✔✔Storm events Combined wastewater is d... efined as ✔✔Sanitary wastewater and stormwater runoff In general, the solids content in wastewater is about ✔✔0.1% In general, what is the percentage of suspended solids in the total amount of solids? ✔✔30% Generally, the percentage of dissolved solids in the amount of total solids is about ✔✔70% Which type of organisms would most probably be associated with poor treatment or young biomass? ✔✔Amoebas Which type of organisms would most probably be associated with very clear plant effluent, low biochemical oxygen demand (BOD), and low amounts of suspended solids? ✔✔Stalked Ciliates Aerobic bacteria will reproduce and live in an environment that contains only ✔✔Oxygen Anaerobic bacteria will reproduce and live only in an environment that completely lacks ✔✔Free or dissolved oxygen (DO) The biochemical oxygen demand (*BOD) test usually has a specific time of ✔✔5 days An Imhoff cone measures ✔✔Volume of settleable solids Septic conditions are caused by ✔✔Anaerobic bacteria Scum is usually removed in the ____ treatment stage ✔✔Primary When domestic wastewater enters natural waters, what species deplete most of the oxygen? ✔✔Aerobic bacteria Once the oxygen is depleted in a natural body of water, which organisms take over? ✔✔Anaerobic bacteria The major gas produced by anaerobic decomposition is ✔✔Methane Another name for primary treatment is ✔✔Sedimentation Digester gas is _____ when mixed with air in the proper portions ✔✔Explosive A pond that is used to treat raw wastewater is called ✔✔A waste stabilization pond A pond that has an aerobic top layer and an anaerobic bottom layer is called ✔✔A facultative pond [Show More]

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