Ca Grade 2 Wastewater Treatment Operator Practice Exam 1 Already Passed
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Course
Wastewater
Institution
Wastewater
What is the methane content in a properly operating anaerobic digester? 65 to 70% by
volume
What will the addition of chlorine gas do to the pH of wastewater? decrease the pH
What is the purpose of a Parshall Flume? Measure the flow rate
What is the typical removal efficency of settleable solid...
Algae is not essential to the successful operation of both aerobic and facultative ponds ✔✔False
= Algae supply most of the oxygen to the supernattant
The addition of acid and CO2 will do what to wastewater? ✔✔lower the pH of wastewater
Hydrogen sulfide will deteriorate what kind of structures? ✔✔concrete structures
The higher the pH, the better the disinfection ✔✔False =
Maintain a dissolved oxygen concentration of 12 to 14 mg/l in the aeration tank ✔✔F
What happens when the velocity of the wastewater in a clarifier is greater in some sections than
others? ✔✔short circuiting
The F/M ratio will decrease when the microorganism population____________in the aeration
tank? ✔✔increases
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