1|Page
Georgia Wastewater Operator Class I|| Verified Exam
Actual Test Questions and Correct Answers With
Rationales LATEST THIS YEAR.pdf||NEWEST EXAM!!!
What might cause thick billows of white sudsy foam in the
aeration tank?
A) MLSS is too high
B) Temperature in the aeration tank is too low
C) Old sludge
D) MLSS is too low - Answer-D) MLSS is too low (v.2 pg
53,75)
What does the "M" in F/M ratio represent?
A) MLSS in aeration tank
B) The influent BOD loading rate into the aeration tank
C) The mixed liquor volatile suspended solids in the
aeration tank
D) The mass of inorganic solids in the aeration tank -
Answer-C) The mixed liquor volatile suspended solids in
the aeration tank (v.2 pg 16)
,2|Page
In general, how will warmer temperature affect the settling
rate of solids in a clarifier?
A) Decrease settling rate
B) Increase the settling rate
C) Temperature will not affect the settling rate
D) Worsen the settling rate - Answer-B) Increase the
settling rate (v.1 pg 134)
What could happen if the digester gas is mixed with air (85
to 95% by volume)?
A) Cause an explosion
B) Improve efficiency of digestion
C) The bacteria will become aerobic and increase VSR
D) The digester becomes safer to operate due to less toxic
gas in the system - Answer-A) Cause an explosion (v.2 pg
158)
How will algae impact the chlorine demand in the pond
effluent?
,3|Page
A) Slightly decreases chlorine demand
B) Does not affect chlorine demand
C) Significantly decreases chlorine demand
D) Increases chlorine demand - Answer-D) Increases
chlorine demand
Which of the following is true about positive displacement
pumps?
A) It is a type of centrifugal pump
B) Suction valve should be closed when the pump is
started
C) It must never be started with the discharge valve closed
D) Adds head to liquid using several impellers - Answer-C)
It must never be started with the discharge valve closed
(v.2 pg 435)
What is true about the F/M ratio?
A) MLVSS data in not required to determine the F/M ration
, 4|Page
B) Volume of the secondary clarifier is not needed to
determine the F/M ratio
C) The amount of COD or BOD entering the aeration tank
does not have to be known to calculate the F/M ratio.
D) The amount of organisms in the aeration tank is not
needed to calculate the F/M ratio - Answer-B) Volume of
the secondary clarifier is not needed to determine the F/M
ratio (v.2 pg 58)
What is the methane content in a properly operation
anaerobic digester?
A) 30 to 35% by volume
B) 1 to 2% by volume
C) 65 to 70% by volume
D) 15 to 20% by volume - Answer-C) 65 to 70% by volume
(v.2 pg 158)
What will the addition of chlorine gas do to the pH of
wastewater?
A) Moderately increase pH
B) pH will not be affected
Georgia Wastewater Operator Class I|| Verified Exam
Actual Test Questions and Correct Answers With
Rationales LATEST THIS YEAR.pdf||NEWEST EXAM!!!
What might cause thick billows of white sudsy foam in the
aeration tank?
A) MLSS is too high
B) Temperature in the aeration tank is too low
C) Old sludge
D) MLSS is too low - Answer-D) MLSS is too low (v.2 pg
53,75)
What does the "M" in F/M ratio represent?
A) MLSS in aeration tank
B) The influent BOD loading rate into the aeration tank
C) The mixed liquor volatile suspended solids in the
aeration tank
D) The mass of inorganic solids in the aeration tank -
Answer-C) The mixed liquor volatile suspended solids in
the aeration tank (v.2 pg 16)
,2|Page
In general, how will warmer temperature affect the settling
rate of solids in a clarifier?
A) Decrease settling rate
B) Increase the settling rate
C) Temperature will not affect the settling rate
D) Worsen the settling rate - Answer-B) Increase the
settling rate (v.1 pg 134)
What could happen if the digester gas is mixed with air (85
to 95% by volume)?
A) Cause an explosion
B) Improve efficiency of digestion
C) The bacteria will become aerobic and increase VSR
D) The digester becomes safer to operate due to less toxic
gas in the system - Answer-A) Cause an explosion (v.2 pg
158)
How will algae impact the chlorine demand in the pond
effluent?
,3|Page
A) Slightly decreases chlorine demand
B) Does not affect chlorine demand
C) Significantly decreases chlorine demand
D) Increases chlorine demand - Answer-D) Increases
chlorine demand
Which of the following is true about positive displacement
pumps?
A) It is a type of centrifugal pump
B) Suction valve should be closed when the pump is
started
C) It must never be started with the discharge valve closed
D) Adds head to liquid using several impellers - Answer-C)
It must never be started with the discharge valve closed
(v.2 pg 435)
What is true about the F/M ratio?
A) MLVSS data in not required to determine the F/M ration
, 4|Page
B) Volume of the secondary clarifier is not needed to
determine the F/M ratio
C) The amount of COD or BOD entering the aeration tank
does not have to be known to calculate the F/M ratio.
D) The amount of organisms in the aeration tank is not
needed to calculate the F/M ratio - Answer-B) Volume of
the secondary clarifier is not needed to determine the F/M
ratio (v.2 pg 58)
What is the methane content in a properly operation
anaerobic digester?
A) 30 to 35% by volume
B) 1 to 2% by volume
C) 65 to 70% by volume
D) 15 to 20% by volume - Answer-C) 65 to 70% by volume
(v.2 pg 158)
What will the addition of chlorine gas do to the pH of
wastewater?
A) Moderately increase pH
B) pH will not be affected
