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Exam (elaborations)

WASTEWATER CLASS C TEST QUESTIONS WITH CORRECT ANSWERS 2025

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WASTEWATER CLASS C TEST QUESTIONS WITH CORRECT ANSWERS 2025

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WASTEWATER CLASS C TEST QUESTIONS WITH CORRECT
ANSWERS 2025.


What test indicates the efficiency of a trickling filter? -- Answer ✔✔ Percent
d._ d. d._ d. d._ d. d._ d. d._ d. d._ d. d._ d. d._ d. d._ d. d._ d. d._ d. d._ d. d._




BOD removal
d. d._ d.




The temperature in an anaerobic digester should NOT change more than? --
d._ d. d._ d. d._ d. d._ d. d._ d. d._ d. d._ d. d._ d. d._ d. d._ d. d._ d. d._




Answer ✔✔ 1°C per day
d. d._ d. d._ d. d._ d. d._ d.




What does a short circuiting in a WW pond cause? -- Answer ✔✔ Decreases
d._ d. d._ d. d._ d. d._ d. d._ d. d._ d. d._ d. d._ d. d._ d. d._ d. d._ d. d._ d. d._ d.




detention time
d._ d. d._ d.




What way does a bell spigot go? -- Answer ✔✔ Upgrade/upstream or uphill
d._ d. d._ d. d._ d. d._ d. d._ d. d._ d. d._ d. d._ d. d._ d. d._ d. d._ d. d._ d.




What is the proper PH level for an aerobic digester? -- Answer ✔✔ 6.8 to
d._ d. d._ d. d._ d. d._ d. d._ d. d._ d. d._ d. d._ d. d._ d. d._ d. d._ d. d._ d. d._ d. d._ d. d._




7.4
d.




What is the most important micro-organism in WW treatment? -- Answer ✔✔
d._ d. d._ d. d._ d. d._ d. d._ d. d._ d. d._ d. d._ d. d._ d. d._ d. d._ d.




Bacteria
d._ d.




What causes ponding in a trickling filter? -- Answer ✔✔ First 6-12 inches of
d._ d. d._ d. d._ d. d._ d. d._ d. d._ d. d._ d. d._ d. d._ d. d._ d. d._ d. d._ d. d._ d. d._




filter is clogged
d. d._ d. d._ d.




What must WW ponds have? -- Answer ✔✔ Multiple inlets and outlets
d._ d. d._ d. d._ d. d._ d. d._ d. d._ d. d._ d. d._ d. d._ d. d._ d. d._ d.




A pump with a worn out impeller and bearing will? -- Answer ✔✔ Pump
d._ d. d._ d. d._ d. d._ d. d._ d. d._ d. d._ d. d._ d. d._ d. d._ d. d._ d. d._ d. d._ d. d._




slower and require more energy than one with a perfect impeller
d. d._ d. d._ d. d._ d. d._ d. d._ d. d._ d. d._ d. d._ d. d._ d. d._ d.




What is a high corrosive gas in lift stations? -- Answer ✔✔ Hydrogen sulfide
d._ d. d._ d. d._ d. d._ d. d._ d. d._ d. d._ d. d._ d. d._ d. d._ d. d._ d. d._ d. d._ d.
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