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MARYLAND WATER TREATMENT PLANT
OPERATOR CLASS G CERTIFICATION EXAM
QUESTIONS AND VERIFIED ANSWERS WITH
RATIONALES JUST RELEASED
MARYLAND WATER TREATMENT PLANT OPERATOR CLASS G CERTIFICATION EXAM
10 MOST RELEVANT AND TESTED COVERAGE AREAS
1. Maryland Class G Certification Requirements and COMAR Regulations
2. Class G Treatment Processes and Facility Classification
3. Groundwater Sources, Wells, Springs, and Source-Water Protection
4. Ultraviolet (UV) Disinfection Principles and Operation
5. Chlorination, Disinfection Residuals, and Contact Requirements
6. Water Quality Monitoring, Sampling, Turbidity, and Microbiological Control
7. Chemical Handling, Feed Systems, Pumps, and Equipment Operation
8. Storage Tanks, Pressure, Flow, Hydraulics, and Distribution Interfaces
9. Operator Safety, Emergency Response, Cross-Connection, and Backflow Prevention
10. Operational Mathematics, Troubleshooting, Recordkeeping, and Regulatory Compliance
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QUESTIONS 1–200
1. Which treatment classification most specifically describes a Maryland Class G water treatment
plant?
A. No chemical treatment
B. Simple iron removal
C. Complete conventional treatment
D. Chemical treatment with fluoridation
Answer: A
Rationale: Maryland's Class G classification applies to water treatment systems involving no chemical
treatment, with examples including wells, storage tanks, and ultraviolet disinfection. Chemical
treatment processes move the facility into other classifications. (Department of the Environment)
2. Which combination is most characteristic of a Maryland Class G water treatment facility?
A. Coagulation, sedimentation, and filtration
B. Well supply, storage, and UV disinfection
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C. Aeration, ion exchange, and chlorination
D. Fluoridation, coagulation, and rapid mixing
Answer: B
Rationale: Class G is specifically associated with systems using groundwater wells, storage tanks, and UV
disinfection without chemical treatment. The other combinations introduce treatment processes
associated with higher classifications. (Department of the Environment)
3. Which agency administers Maryland's water treatment operator certification program?
A. Maryland Department of Health
B. Maryland Public Service Commission
C. Maryland Department of the Environment
D. Maryland Department of Agriculture
Answer: C
Rationale: The Maryland Department of the Environment administers the operator certification
program through the Board of Waterworks and Waste Systems Operators. The program establishes
education, experience, examination, and renewal standards. (Department of the Environment)
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4. Which regulation chapter governs Maryland waterworks and waste systems operator certification?
A. COMAR 26.04.01
B. COMAR 26.08.05
C. COMAR 26.17.06
D. COMAR 26.06.01
Answer: D
Rationale: COMAR 26.06.01 contains Maryland's regulations governing the Board of Waterworks and
Waste Systems Operators. Drinking-water quality requirements are addressed separately under COMAR
26.04.01. (Department of the Environment)
5. Why is operator certification matched to the treatment classification?
A. To ensure technical qualification for the treatment technology
B. To determine the utility's water-rate structure
C. To establish the size of the distribution network
D. To determine the source-water ownership category
MARYLAND WATER TREATMENT PLANT
OPERATOR CLASS G CERTIFICATION EXAM
QUESTIONS AND VERIFIED ANSWERS WITH
RATIONALES JUST RELEASED
MARYLAND WATER TREATMENT PLANT OPERATOR CLASS G CERTIFICATION EXAM
10 MOST RELEVANT AND TESTED COVERAGE AREAS
1. Maryland Class G Certification Requirements and COMAR Regulations
2. Class G Treatment Processes and Facility Classification
3. Groundwater Sources, Wells, Springs, and Source-Water Protection
4. Ultraviolet (UV) Disinfection Principles and Operation
5. Chlorination, Disinfection Residuals, and Contact Requirements
6. Water Quality Monitoring, Sampling, Turbidity, and Microbiological Control
7. Chemical Handling, Feed Systems, Pumps, and Equipment Operation
8. Storage Tanks, Pressure, Flow, Hydraulics, and Distribution Interfaces
9. Operator Safety, Emergency Response, Cross-Connection, and Backflow Prevention
10. Operational Mathematics, Troubleshooting, Recordkeeping, and Regulatory Compliance
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QUESTIONS 1–200
1. Which treatment classification most specifically describes a Maryland Class G water treatment
plant?
A. No chemical treatment
B. Simple iron removal
C. Complete conventional treatment
D. Chemical treatment with fluoridation
Answer: A
Rationale: Maryland's Class G classification applies to water treatment systems involving no chemical
treatment, with examples including wells, storage tanks, and ultraviolet disinfection. Chemical
treatment processes move the facility into other classifications. (Department of the Environment)
2. Which combination is most characteristic of a Maryland Class G water treatment facility?
A. Coagulation, sedimentation, and filtration
B. Well supply, storage, and UV disinfection
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C. Aeration, ion exchange, and chlorination
D. Fluoridation, coagulation, and rapid mixing
Answer: B
Rationale: Class G is specifically associated with systems using groundwater wells, storage tanks, and UV
disinfection without chemical treatment. The other combinations introduce treatment processes
associated with higher classifications. (Department of the Environment)
3. Which agency administers Maryland's water treatment operator certification program?
A. Maryland Department of Health
B. Maryland Public Service Commission
C. Maryland Department of the Environment
D. Maryland Department of Agriculture
Answer: C
Rationale: The Maryland Department of the Environment administers the operator certification
program through the Board of Waterworks and Waste Systems Operators. The program establishes
education, experience, examination, and renewal standards. (Department of the Environment)
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4. Which regulation chapter governs Maryland waterworks and waste systems operator certification?
A. COMAR 26.04.01
B. COMAR 26.08.05
C. COMAR 26.17.06
D. COMAR 26.06.01
Answer: D
Rationale: COMAR 26.06.01 contains Maryland's regulations governing the Board of Waterworks and
Waste Systems Operators. Drinking-water quality requirements are addressed separately under COMAR
26.04.01. (Department of the Environment)
5. Why is operator certification matched to the treatment classification?
A. To ensure technical qualification for the treatment technology
B. To determine the utility's water-rate structure
C. To establish the size of the distribution network
D. To determine the source-water ownership category
