CA Grade 2 Wastewater
Treatment Operator Practice
Exam 1 | Study Guide & Exam
Prep 2026/2027
, What is the methane content in a properly operating 65 to 70% by volume
anaerobic digester?
What will the addition of chlorine gas do to the pH of decrease the pH
wastewater?
What is the purpose of a Parshall Flume? Measure the flow rate
What is the typical removal efficency of settleable solids in 95 to 99%
a primary clarifier?
Which of the follwing is true about pumoing scum from a scum causes more piping problems than other substances pumped at a wastewater
primary clarifier? treatment plant
What might cause thick billows of white sudsy foam in the MLSS is too low
aeration tank?
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 Increase the settling rate
solids in a clarifer?
What could happen if the digester gas is mixed with air(85 Cause an explosion
to 95% by volume)?
How will algae impact the chlorine demand in the pond increase the chlorine demand
effluent?
Which of the following is true about a positive it must never be started with the discharge valve closed
displacement pump?
What is true about the F/M ratio? the volume of the secondary clarifier is not needed to determine the f/m ratio
Which of the following is one of the basic rules of lab never pipet hazardous material with your mouth, even if the pipet has been
work? sterialized
What is the recirculation ratio for a trickling filter? Qr/Q
Which of the following is true about COD and BOD? they are indirect measurements of the organic content in the influent
Treatment Operator Practice
Exam 1 | Study Guide & Exam
Prep 2026/2027
, What is the methane content in a properly operating 65 to 70% by volume
anaerobic digester?
What will the addition of chlorine gas do to the pH of decrease the pH
wastewater?
What is the purpose of a Parshall Flume? Measure the flow rate
What is the typical removal efficency of settleable solids in 95 to 99%
a primary clarifier?
Which of the follwing is true about pumoing scum from a scum causes more piping problems than other substances pumped at a wastewater
primary clarifier? treatment plant
What might cause thick billows of white sudsy foam in the MLSS is too low
aeration tank?
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 Increase the settling rate
solids in a clarifer?
What could happen if the digester gas is mixed with air(85 Cause an explosion
to 95% by volume)?
How will algae impact the chlorine demand in the pond increase the chlorine demand
effluent?
Which of the following is true about a positive it must never be started with the discharge valve closed
displacement pump?
What is true about the F/M ratio? the volume of the secondary clarifier is not needed to determine the f/m ratio
Which of the following is one of the basic rules of lab never pipet hazardous material with your mouth, even if the pipet has been
work? sterialized
What is the recirculation ratio for a trickling filter? Qr/Q
Which of the following is true about COD and BOD? they are indirect measurements of the organic content in the influent
