WI DNR Wastewater Operator Certification (General)
Study online at https://quizlet.com/_g4ere3
1. Which provides a better composite A smaller sample collected more often
representative:
A. A smaller sample collected more
often
B. A larger sample collected less of-
ten
2. Which part of the treatment Secondary
process uses biological processes?
A: Primary
B: Secondary
C: Tertiary
D: WAS
3. The activated sludge (bio mass) col- Return Activated Sludge (RAS)
lected in the final clarifier and re-
turned to the secondary treatment
process to mix with the incoming
wastewater is:
A: Mixed Liquor Suspended Solids
(MLSS)
B: Waste Activated Sludge (WAS)
C: Return Activated Sludge (RAS)
D: Mixed Liquor Volatile Suspended
Solids (MLSS)
4. Define primary treatment Clarification by solid and liquid separation that re-
moves a substantial amount of suspended and float-
ing matter.
5. True or False: Disinfection destroys False
all microorganisms?
, WI DNR Wastewater Operator Certification (General)
Study online at https://quizlet.com/_g4ere3
6. What type of solids does a clarifier Floating and settled
remove?
7. Define F:M using BOD and MLSS F:M is the food:microorganism ratio where the 'food'
is BOD and the microorganisms are the MLSS/MLVSS.
8. What is a restriction in an open Flume
channel used to measure flow?
A: Weir
B: Box cord
C: Packing
D: Flume
9. What is a selector? Part of the treatment system that selects a specific type
of organism by providing an environment (Anaerobic,
anoxic, or aerobic) that favors its growth.
10. _____ are flows generated within the Sidestreams
plant, usually from solids process-
ing that has been recycled back
through the plant.
11. _____ is the treatment process that Tertiary treatment
uses physical, chemical, or biologi-
cal processes to remove suspended
solids and nutrients in wastewater
to accomplish a level of treatment
greater than what can be accom-
plished by secondary treatment.
A: Primary treatment
B: Disinfection
, WI DNR Wastewater Operator Certification (General)
Study online at https://quizlet.com/_g4ere3
C: Tertiary treatment
D: Sour treatment
12. The activated sludge (except bio- Waste Activated Sludge (WAS)
mass or cell mass) removed from
the secondary treatment process.
A: Mixed Liquor Suspended Solids
(MLSS)
B: Waste Activated Sludge (WAS)
C: Return Activated Sludge (RAS)
D: Mixed Liquor Volatile Suspended
Solids (MLSS)
13. What are the two main reasons for To protect public health by destroying pathogens and
treating wastewater? to protect the environment by removing pollutants.
14. Discuss the effect of I&I on a collec- (1)Exceed capacity of the pipes = sanitary sewer over-
tion system flows (SSO).
(2) Very high flows entering the treatment facility can
lead to too much flow going through aeration basins
and clarifiers washing out solids, creating a loss of
treatment efficiency
15. A structure that allows a pipe to dip Inverted Siphon
below an obstruction by forming a
"U" shaped path. Liquid flowing in
one end is forced up and out the
over. It is typically used in collec-
tions when there is a river or other
deep obstructions.
A: Gate Valve Structure
Study online at https://quizlet.com/_g4ere3
1. Which provides a better composite A smaller sample collected more often
representative:
A. A smaller sample collected more
often
B. A larger sample collected less of-
ten
2. Which part of the treatment Secondary
process uses biological processes?
A: Primary
B: Secondary
C: Tertiary
D: WAS
3. The activated sludge (bio mass) col- Return Activated Sludge (RAS)
lected in the final clarifier and re-
turned to the secondary treatment
process to mix with the incoming
wastewater is:
A: Mixed Liquor Suspended Solids
(MLSS)
B: Waste Activated Sludge (WAS)
C: Return Activated Sludge (RAS)
D: Mixed Liquor Volatile Suspended
Solids (MLSS)
4. Define primary treatment Clarification by solid and liquid separation that re-
moves a substantial amount of suspended and float-
ing matter.
5. True or False: Disinfection destroys False
all microorganisms?
, WI DNR Wastewater Operator Certification (General)
Study online at https://quizlet.com/_g4ere3
6. What type of solids does a clarifier Floating and settled
remove?
7. Define F:M using BOD and MLSS F:M is the food:microorganism ratio where the 'food'
is BOD and the microorganisms are the MLSS/MLVSS.
8. What is a restriction in an open Flume
channel used to measure flow?
A: Weir
B: Box cord
C: Packing
D: Flume
9. What is a selector? Part of the treatment system that selects a specific type
of organism by providing an environment (Anaerobic,
anoxic, or aerobic) that favors its growth.
10. _____ are flows generated within the Sidestreams
plant, usually from solids process-
ing that has been recycled back
through the plant.
11. _____ is the treatment process that Tertiary treatment
uses physical, chemical, or biologi-
cal processes to remove suspended
solids and nutrients in wastewater
to accomplish a level of treatment
greater than what can be accom-
plished by secondary treatment.
A: Primary treatment
B: Disinfection
, WI DNR Wastewater Operator Certification (General)
Study online at https://quizlet.com/_g4ere3
C: Tertiary treatment
D: Sour treatment
12. The activated sludge (except bio- Waste Activated Sludge (WAS)
mass or cell mass) removed from
the secondary treatment process.
A: Mixed Liquor Suspended Solids
(MLSS)
B: Waste Activated Sludge (WAS)
C: Return Activated Sludge (RAS)
D: Mixed Liquor Volatile Suspended
Solids (MLSS)
13. What are the two main reasons for To protect public health by destroying pathogens and
treating wastewater? to protect the environment by removing pollutants.
14. Discuss the effect of I&I on a collec- (1)Exceed capacity of the pipes = sanitary sewer over-
tion system flows (SSO).
(2) Very high flows entering the treatment facility can
lead to too much flow going through aeration basins
and clarifiers washing out solids, creating a loss of
treatment efficiency
15. A structure that allows a pipe to dip Inverted Siphon
below an obstruction by forming a
"U" shaped path. Liquid flowing in
one end is forced up and out the
over. It is typically used in collec-
tions when there is a river or other
deep obstructions.
A: Gate Valve Structure
