Ca Grade 2 Wastewater Treatment Operator Practice Exam 1 question & answers 2023

Ca Grade 2 Wastewater Treatment Operator Practice Exam 1 question & answers 2023What is the methane content in a properly operating anaerobic digester? - correct answer 65 to 70% by volume What will the addition of chlorine gas do to the pH of wastewater? - correct answer decrease the pH What is the purpose of a Parshall Flume? - correct answer Measure the flow rate What is the typical removal efficency of settleable solids in a primary clarifier? - correct answer 95 to 99% Which of the follwing is true about pumoing scum from a primary clarifier? - correct answer scum causes more piping problems than other substances pumped at a wastewater treatment plant What might cause thick billows of white sudsy foam in the aeration tank? - correct answer MLSS is too low What does the M in F/M ratio represent? - correct answer The mixed liquor volatile suspended solids in the aeration tank In general, how will warmer temp affect the settling rate of solids in a clarifer? - correct answer Increase the settling rate What could happen if the digester gas is mixed with air(85 to 95% by volume)? - correct answer Cause an explosion