Page 1 of 82
Maine (ME) Plant Operator Authority Exam —
Maine complete questions with verified answers
latest update this year Get Pdf
,Page 2 of 82
Introduction
Comprehensive wastewater treatment plant operator exam-
preparation material covering preliminary and secondary
treatment, sedimentation, biological processes, nitrification and
denitrification, phosphorus removal, sludge handling, process
control, collection systems, pumps, chemical treatment, filtration,
safety, and regulatory compliance. The document contains 200
original multiple-choice practice questions with answers and
rationales, including topics such as confined-space safety, hydraulic
loading, activated sludge, RAS, MLSS, sludge dewatering, and
Maine wastewater operator certification.
Exam Questions and Answers
1. What agency oversees Maine's Wastewater Operator
Certification Program?
A. Maine Department of Transportation
B. Maine Department of Environmental Protection
C. Maine Department of Agriculture
D. Maine Public Utilities Commission
Answer: B
,Page 3 of 82
Rationale: The Maine Department of Environmental Protection
(MEDEP) oversees the wastewater operator certification program.
(maine.gov)
2. What does ORC stand for?
A. Operational Regulation Coordinator
B. Operator in Responsible Charge
C. Operations Reporting Certification
D. Official Regulatory Coordinator
Answer: B
Rationale: ORC means Operator in Responsible Charge, the person
designated as having direct responsibility for supervising,
managing, or operating the wastewater treatment plant.
(mainelegislature.org)
3. What is a major responsibility of an ORC?
A. Performing only administrative duties
B. Ensuring the plant is operated according to applicable laws,
rules, and licenses
C. Purchasing all laboratory equipment
D. Designing every treatment facility
Answer: B
, Page 4 of 82
Rationale: Maine law defines the ORC as responsible for
supervising, managing, or operating the facility and ensuring
compliance with applicable requirements. (mainelegislature.org)
4. Which factor can influence a wastewater plant's classification in
Maine?
A. Building paint color
B. Design flow and treatment complexity
C. Number of office computers
D. Parking-lot size
Answer: B
Rationale: Maine DEP considers factors such as design flow, unit
operations, and system complexity when classifying wastewater
treatment plants. (maine.gov)
5. Which is a Maine wastewater treatment plant classification
category?
A. Biological
B. Residential
C. Commercial
D. Agricultural
Answer: A
Maine (ME) Plant Operator Authority Exam —
Maine complete questions with verified answers
latest update this year Get Pdf
,Page 2 of 82
Introduction
Comprehensive wastewater treatment plant operator exam-
preparation material covering preliminary and secondary
treatment, sedimentation, biological processes, nitrification and
denitrification, phosphorus removal, sludge handling, process
control, collection systems, pumps, chemical treatment, filtration,
safety, and regulatory compliance. The document contains 200
original multiple-choice practice questions with answers and
rationales, including topics such as confined-space safety, hydraulic
loading, activated sludge, RAS, MLSS, sludge dewatering, and
Maine wastewater operator certification.
Exam Questions and Answers
1. What agency oversees Maine's Wastewater Operator
Certification Program?
A. Maine Department of Transportation
B. Maine Department of Environmental Protection
C. Maine Department of Agriculture
D. Maine Public Utilities Commission
Answer: B
,Page 3 of 82
Rationale: The Maine Department of Environmental Protection
(MEDEP) oversees the wastewater operator certification program.
(maine.gov)
2. What does ORC stand for?
A. Operational Regulation Coordinator
B. Operator in Responsible Charge
C. Operations Reporting Certification
D. Official Regulatory Coordinator
Answer: B
Rationale: ORC means Operator in Responsible Charge, the person
designated as having direct responsibility for supervising,
managing, or operating the wastewater treatment plant.
(mainelegislature.org)
3. What is a major responsibility of an ORC?
A. Performing only administrative duties
B. Ensuring the plant is operated according to applicable laws,
rules, and licenses
C. Purchasing all laboratory equipment
D. Designing every treatment facility
Answer: B
, Page 4 of 82
Rationale: Maine law defines the ORC as responsible for
supervising, managing, or operating the facility and ensuring
compliance with applicable requirements. (mainelegislature.org)
4. Which factor can influence a wastewater plant's classification in
Maine?
A. Building paint color
B. Design flow and treatment complexity
C. Number of office computers
D. Parking-lot size
Answer: B
Rationale: Maine DEP considers factors such as design flow, unit
operations, and system complexity when classifying wastewater
treatment plants. (maine.gov)
5. Which is a Maine wastewater treatment plant classification
category?
A. Biological
B. Residential
C. Commercial
D. Agricultural
Answer: A
