Wastewater Treatment Operator Practice Exam 1: Wastewater Treatment Operator Certification Test 1: 100% Verified Questions & Answers; Latest Updated

What is the methane content in a properly operating anaerobic digester? (Ans- 65 to 70% by volume What will the addition of chlorine gas do to the pH of wastewater? (Ans- decrease the pH What is the purpose of a Parshall Flume? (Ans- Measure the flow rate What is the typical removal efficiency of settleable solids in a primary clarifier? (Ans- 95 to 99% Which of the following is true about pumping scum from a primary clarifier? (Ans- 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? (Ans- MLSS is too low What does the M in F/M ratio represent? (Ans- The mixed liquor volatile suspended solids in the aeration tank In general, how will warmer temp affect the settling rate of solids in a clarifier? (Ans- Increase the settling rate What could happen if the digester gas is mixed with air(85 to 95% by volume)? (Ans- Cause an explosion