Ca Grade 2 Wastewater Treatment
Operator Practice Exam 1 Already
Passed
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 solids in a primary clarifier? ✔✔95 to 99%
Which of the follwing is true about pumoing scum from a primary clarifier? ✔✔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? ✔✔MLSS is too low
, What does the M in F/M ratio represent? ✔✔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? ✔✔Increase the
settling rate
What could happen if the digester gas is mixed with air(85 to 95% by volume)? ✔✔Cause an
explosion
How will algae impact the chlorine demand in the pond effluent? ✔✔increase the chlorine
demand
Which of the following is true about a positive displacement pump? ✔✔it must never be started
with the discharge valve closed
What is true about the F/M ratio? ✔✔the volume of the secondary clarifier is not needed to
determine the f/m ratio
Operator Practice Exam 1 Already
Passed
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 solids in a primary clarifier? ✔✔95 to 99%
Which of the follwing is true about pumoing scum from a primary clarifier? ✔✔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? ✔✔MLSS is too low
, What does the M in F/M ratio represent? ✔✔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? ✔✔Increase the
settling rate
What could happen if the digester gas is mixed with air(85 to 95% by volume)? ✔✔Cause an
explosion
How will algae impact the chlorine demand in the pond effluent? ✔✔increase the chlorine
demand
Which of the following is true about a positive displacement pump? ✔✔it must never be started
with the discharge valve closed
What is true about the F/M ratio? ✔✔the volume of the secondary clarifier is not needed to
determine the f/m ratio
