Oklahoma Waterworks Operator Class
C Exam Practice Questions And
Correct Answers (Verified Answers)
Plus Rationale 2027 Q&A| Instant
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1. A Class C waterworks operator in Oklahoma is primarily responsible
for which of the following functions within a water treatment
system?
A. Designing new municipal water treatment plants
B. Operating and monitoring water treatment processes to produce safe
drinking water
C. Approving all state drinking-water regulations
D. Performing only administrative billing functions
The Class C operator's role centers on the safe operation and monitoring
of water treatment processes, including equipment, chemical treatment,
water quality, and operational controls.
2. Which organization is responsible for operator certification for
waterworks and wastewater operators in Oklahoma?
,A. Oklahoma Water Resources Board
B. Oklahoma Corporation Commission
C. Oklahoma Department of Environmental Quality (DEQ)
D. Oklahoma State Department of Agriculture
The Oklahoma Department of Environmental Quality administers the
water and wastewater operator certification program and licenses
operators working in covered systems.
3. Under Oklahoma operator-certification requirements, what
minimum examination score is generally required to pass a
validated operator examination?
A. 60%
B. 65%
C. 70%
D. 80%
Oklahoma DEQ rules require an applicant to answer at least 70 percent
of examination questions correctly to pass a validated operator
examination.
4. An operator who fails an Oklahoma validated waterworks
examination must generally wait at least how long before retaking
the examination?
A. 7 days
B. 14 days
,C. 30 days
D. 90 days
Oklahoma rules specify a minimum 30-day waiting period before an
applicant who fails a validated examination may retake it.
5. Which sequence correctly represents the general treatment
objective for conventional drinking-water treatment?
A. Disinfection → coagulation → screening → distribution
B. Coagulation → flocculation → sedimentation → filtration →
disinfection
C. Filtration → sedimentation → coagulation → aeration
D. Softening → fluoridation → coagulation → screening
Conventional treatment generally uses coagulation and flocculation to
form particles, sedimentation to remove settleable floc, filtration for
additional particulate removal, and disinfection to control pathogens.
6. What is the principal purpose of coagulation in a conventional
water treatment plant?
A. To increase water temperature
B. To destroy all microorganisms immediately
C. To destabilize suspended and colloidal particles so they can form
removable floc
D. To add oxygen to finished water
, Coagulation neutralizes or destabilizes particle charges, allowing small
particles and colloids to come together during subsequent flocculation.
7. What is the primary purpose of flocculation?
A. To evaporate dissolved minerals
B. To rapidly inject disinfectant
C. To gently mix destabilized particles so they form larger, settleable
flocs
D. To force water through filter media at maximum velocity
Flocculation uses controlled, relatively gentle mixing to promote
collisions between destabilized particles and produce larger flocs that
can be removed by sedimentation.
8. Why is excessive mixing during flocculation undesirable?
A. It always increases alkalinity
B. It causes chlorine to become more concentrated
C. It can break apart previously formed floc
D. It converts all suspended solids into dissolved solids
Floc is relatively fragile, so excessive turbulence can shear the particles
apart and reduce sedimentation and filtration performance.
9. What is the primary purpose of a sedimentation basin?
A. To add chlorine to raw water
B. To increase water pressure
C Exam Practice Questions And
Correct Answers (Verified Answers)
Plus Rationale 2027 Q&A| Instant
Download Pdf.
1. A Class C waterworks operator in Oklahoma is primarily responsible
for which of the following functions within a water treatment
system?
A. Designing new municipal water treatment plants
B. Operating and monitoring water treatment processes to produce safe
drinking water
C. Approving all state drinking-water regulations
D. Performing only administrative billing functions
The Class C operator's role centers on the safe operation and monitoring
of water treatment processes, including equipment, chemical treatment,
water quality, and operational controls.
2. Which organization is responsible for operator certification for
waterworks and wastewater operators in Oklahoma?
,A. Oklahoma Water Resources Board
B. Oklahoma Corporation Commission
C. Oklahoma Department of Environmental Quality (DEQ)
D. Oklahoma State Department of Agriculture
The Oklahoma Department of Environmental Quality administers the
water and wastewater operator certification program and licenses
operators working in covered systems.
3. Under Oklahoma operator-certification requirements, what
minimum examination score is generally required to pass a
validated operator examination?
A. 60%
B. 65%
C. 70%
D. 80%
Oklahoma DEQ rules require an applicant to answer at least 70 percent
of examination questions correctly to pass a validated operator
examination.
4. An operator who fails an Oklahoma validated waterworks
examination must generally wait at least how long before retaking
the examination?
A. 7 days
B. 14 days
,C. 30 days
D. 90 days
Oklahoma rules specify a minimum 30-day waiting period before an
applicant who fails a validated examination may retake it.
5. Which sequence correctly represents the general treatment
objective for conventional drinking-water treatment?
A. Disinfection → coagulation → screening → distribution
B. Coagulation → flocculation → sedimentation → filtration →
disinfection
C. Filtration → sedimentation → coagulation → aeration
D. Softening → fluoridation → coagulation → screening
Conventional treatment generally uses coagulation and flocculation to
form particles, sedimentation to remove settleable floc, filtration for
additional particulate removal, and disinfection to control pathogens.
6. What is the principal purpose of coagulation in a conventional
water treatment plant?
A. To increase water temperature
B. To destroy all microorganisms immediately
C. To destabilize suspended and colloidal particles so they can form
removable floc
D. To add oxygen to finished water
, Coagulation neutralizes or destabilizes particle charges, allowing small
particles and colloids to come together during subsequent flocculation.
7. What is the primary purpose of flocculation?
A. To evaporate dissolved minerals
B. To rapidly inject disinfectant
C. To gently mix destabilized particles so they form larger, settleable
flocs
D. To force water through filter media at maximum velocity
Flocculation uses controlled, relatively gentle mixing to promote
collisions between destabilized particles and produce larger flocs that
can be removed by sedimentation.
8. Why is excessive mixing during flocculation undesirable?
A. It always increases alkalinity
B. It causes chlorine to become more concentrated
C. It can break apart previously formed floc
D. It converts all suspended solids into dissolved solids
Floc is relatively fragile, so excessive turbulence can shear the particles
apart and reduce sedimentation and filtration performance.
9. What is the primary purpose of a sedimentation basin?
A. To add chlorine to raw water
B. To increase water pressure
