1|Page
Georgia Onsite Wastewater Pumper Certification
Exam||Verified Questions and Correct Answers with
EXPLANATIONS LATEST UPDATE.pdf
What is the predominant organism responsible for
stabilizing the waste in a trickling filter?
a) Algae
b) Fungi
c) Bacteria
d) Protozoa - Answer-c) Bacteria
Where should the air relief valve be located in a forced
main in the collection system?
a) At the pump station
b) At the lowest point
c) At every manhole
d) At the highest elevation in the line - Answer-d) At the
highest elevation in the line
What hazardous gases might an operator be potentially
exposed to?
a) Oxygen and nitrogen
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b) Chlorine and carbon monoxide
c) Hydrogen sulfide and methane
d) Ammonia and ozone - Answer-c) Hydrogen sulfide and
methane
What is the ratio of methane to carbon dioxide in a
properly operating anaerobic digester?
a) 50% methane / 50% CO₂
b) 30% methane / 70% CO₂
c) 65-70% methane / 30-35% CO₂
d) 80% methane / 20% CO₂ - Answer-c) 65-70% methane
/ 30-35% CO₂
What should be worn to enter a space with a large
chlorine leak?
a) Dust mask
b) SCBA (Self-Contained Breathing Apparatus)
c) Surgical mask
d) Respirator with filter - Answer-b) SCBA (Self-Contained
Breathing Apparatus)
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Why is wastewater disinfected?
a) To improve its smell
b) To remove suspended solids
c) To destroy or disable pathogenic organisms
d) To reduce temperature - Answer-c) To destroy or
disable pathogenic organisms
The rakes in a primary clarifier jerk, skip, or hang. What
should be done?
a) Replace the motor
b) Increase flow rate
c) Drain clarifier and determine the source of the problem
d) Add lubricant - Answer-c) Drain clarifier and determine
the source of the problem
You have an inflow of 100 gallons of storm water into your
collection system. How many people does this represent?
a) 10-20 people
b) 25-50 people
c) 100-200 gallons per day per person
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d) 300-400 people - Answer-c) 100-200 gallons per day
per person
What is the best test to determine the stabilization of
waste in aerobic digestion?
a) BOD
b) COD
c) Volatile solids
d) Settleable solids - Answer-c) Volatile solids
What are three physical factors that determine facultative
pond efficiency?
a) Flow rate, pressure, and pH
b) Temperature, short-circuiting, and depth
c) Alkalinity, chlorine, and flow
d) Turbidity, color, and odor - Answer-b) Temperature,
short-circuiting, and depth
Organisms that are both aerobic and anaerobic are called
what?
a) Pathogenic
Georgia Onsite Wastewater Pumper Certification
Exam||Verified Questions and Correct Answers with
EXPLANATIONS LATEST UPDATE.pdf
What is the predominant organism responsible for
stabilizing the waste in a trickling filter?
a) Algae
b) Fungi
c) Bacteria
d) Protozoa - Answer-c) Bacteria
Where should the air relief valve be located in a forced
main in the collection system?
a) At the pump station
b) At the lowest point
c) At every manhole
d) At the highest elevation in the line - Answer-d) At the
highest elevation in the line
What hazardous gases might an operator be potentially
exposed to?
a) Oxygen and nitrogen
,2|Page
b) Chlorine and carbon monoxide
c) Hydrogen sulfide and methane
d) Ammonia and ozone - Answer-c) Hydrogen sulfide and
methane
What is the ratio of methane to carbon dioxide in a
properly operating anaerobic digester?
a) 50% methane / 50% CO₂
b) 30% methane / 70% CO₂
c) 65-70% methane / 30-35% CO₂
d) 80% methane / 20% CO₂ - Answer-c) 65-70% methane
/ 30-35% CO₂
What should be worn to enter a space with a large
chlorine leak?
a) Dust mask
b) SCBA (Self-Contained Breathing Apparatus)
c) Surgical mask
d) Respirator with filter - Answer-b) SCBA (Self-Contained
Breathing Apparatus)
,3|Page
Why is wastewater disinfected?
a) To improve its smell
b) To remove suspended solids
c) To destroy or disable pathogenic organisms
d) To reduce temperature - Answer-c) To destroy or
disable pathogenic organisms
The rakes in a primary clarifier jerk, skip, or hang. What
should be done?
a) Replace the motor
b) Increase flow rate
c) Drain clarifier and determine the source of the problem
d) Add lubricant - Answer-c) Drain clarifier and determine
the source of the problem
You have an inflow of 100 gallons of storm water into your
collection system. How many people does this represent?
a) 10-20 people
b) 25-50 people
c) 100-200 gallons per day per person
, 4|Page
d) 300-400 people - Answer-c) 100-200 gallons per day
per person
What is the best test to determine the stabilization of
waste in aerobic digestion?
a) BOD
b) COD
c) Volatile solids
d) Settleable solids - Answer-c) Volatile solids
What are three physical factors that determine facultative
pond efficiency?
a) Flow rate, pressure, and pH
b) Temperature, short-circuiting, and depth
c) Alkalinity, chlorine, and flow
d) Turbidity, color, and odor - Answer-b) Temperature,
short-circuiting, and depth
Organisms that are both aerobic and anaerobic are called
what?
a) Pathogenic
