Page 1 of 167
Maine Master Plumber Exam QUESTIONS AND
CORRECT ANSWERS WITH RATIONALES
# Maine Master Plumber Exam Practice Questions with Rationales
Exam Coverage Areas (Most Tested Topics)
1. Maine Plumbing Code & Regulations - 2021 Uniform Plumbing Code (UPC) adoption, Maine-specific
amendments, municipal authority (Title 30-A §4211)
2. Licensing Requirements - Experience qualifications (1 year/2,000 hours as Journeyman OR 4
years/8,000 hours as Trainee), passing score (75% minimum)
3. Administration & Procedures - PROV, Inc. exam provider, closed-book format, online application
system (effective Jan 1, 2024)
4. Drain, Waste & Vent (DWV) Systems - Pipe sizing, fixture units (DFU), venting requirements, trap
protection, cleanout placement
5. Water Supply Systems - Sizing methods (fixture units, flush tank method), cross-connection control,
backflow prevention devices
6. Plumbing Fixtures & Appliances - Water closet requirements, clearances, dishwasher air gaps, fixture
tables
7. Subsurface Wastewater Disposal - Maine DEP rules, septic system requirements, replacement system
documentation
8. Frost Protection & Maine Climate - Freeze protection requirements, vent terminal sizing, insulation
standards
9. Materials & Pipe Sizing - Approved materials, prohibited materials (lead pipe), minimum pipe
diameters
10. System Design & Calculations - Drainage fixture units (DFU), water supply fixture units (WSFU), pipe
sizing, pressure considerations
11. Safety & Health Protection - Backflow prevention, cross-connection control, potable water
protection
12. Municipal Authority - More restrictive ordinances permitted, enforcement responsibilities
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## SECTION 1: LICENSING AND REGULATORY REQUIREMENTS (Questions 1-35)
1. What is the minimum passing score required to successfully pass the Maine Master Plumber licensing
examination, and how does this differ from the journeyman plumber examination requirements?
A) 70% for Master, 65% for Journeyman
B) 75% for Master, 70% for Journeyman
C) 80% for Master, 75% for Journeyman
D) 70% for both Master and Journeyman
Answer: B - The passing grade on a master plumber license examination may not be less than 75%. The
passing grade on a journeyman plumber license examination may not be less than 70% .
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2. According to Maine law, an applicant may qualify for the Master Plumber examination with a
minimum of at least one year (2,000 hours) of work as a licensed journeyman plumber OR with a
minimum of how many years and hours of work as a licensed trainee plumber under the supervision of a
licensed master plumber?
A) 2 years with 4,000 hours
B) 3 years with 6,000 hours
C) 4 years with 8,000 hours
D) 5 years with 10,000 hours
Answer: C - The board may issue a master plumber license to a person who provides satisfactory
evidence of a minimum of at least one year with 2,000 hours of work as a journeyman plumber OR a
minimum of at least 4 years with 8,000 hours of work as a trainee plumber under the supervision of a
master plumber .
---
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3. Which state agency is responsible for licensing and regulating plumbers in Maine, and which specific
board within that agency oversees the plumbing profession?
A) Maine Department of Environmental Protection; Water Quality Board
B) Department of Professional and Financial Regulation; Plumbers' Examining Board
C) Maine Department of Health and Human Services; Environmental Health Board
D) Department of Labor; Occupational Licensing Board
Answer: B - The Plumbers' Examining Board operates under the Department of Professional and
Financial Regulation (DPFR) . The board was established to preserve and protect the health of the
people of Maine by ensuring adequate safety and health standards for plumbing installations .
---
4. What is the current plumbing code adopted by the Maine Plumbers' Examining Board, and when did it
become effective?
A) 2018 Uniform Plumbing Code, effective January 1, 2020
Maine Master Plumber Exam QUESTIONS AND
CORRECT ANSWERS WITH RATIONALES
# Maine Master Plumber Exam Practice Questions with Rationales
Exam Coverage Areas (Most Tested Topics)
1. Maine Plumbing Code & Regulations - 2021 Uniform Plumbing Code (UPC) adoption, Maine-specific
amendments, municipal authority (Title 30-A §4211)
2. Licensing Requirements - Experience qualifications (1 year/2,000 hours as Journeyman OR 4
years/8,000 hours as Trainee), passing score (75% minimum)
3. Administration & Procedures - PROV, Inc. exam provider, closed-book format, online application
system (effective Jan 1, 2024)
4. Drain, Waste & Vent (DWV) Systems - Pipe sizing, fixture units (DFU), venting requirements, trap
protection, cleanout placement
5. Water Supply Systems - Sizing methods (fixture units, flush tank method), cross-connection control,
backflow prevention devices
6. Plumbing Fixtures & Appliances - Water closet requirements, clearances, dishwasher air gaps, fixture
tables
7. Subsurface Wastewater Disposal - Maine DEP rules, septic system requirements, replacement system
documentation
8. Frost Protection & Maine Climate - Freeze protection requirements, vent terminal sizing, insulation
standards
9. Materials & Pipe Sizing - Approved materials, prohibited materials (lead pipe), minimum pipe
diameters
10. System Design & Calculations - Drainage fixture units (DFU), water supply fixture units (WSFU), pipe
sizing, pressure considerations
11. Safety & Health Protection - Backflow prevention, cross-connection control, potable water
protection
12. Municipal Authority - More restrictive ordinances permitted, enforcement responsibilities
---
, Page 2 of 167
## SECTION 1: LICENSING AND REGULATORY REQUIREMENTS (Questions 1-35)
1. What is the minimum passing score required to successfully pass the Maine Master Plumber licensing
examination, and how does this differ from the journeyman plumber examination requirements?
A) 70% for Master, 65% for Journeyman
B) 75% for Master, 70% for Journeyman
C) 80% for Master, 75% for Journeyman
D) 70% for both Master and Journeyman
Answer: B - The passing grade on a master plumber license examination may not be less than 75%. The
passing grade on a journeyman plumber license examination may not be less than 70% .
---
, Page 3 of 167
2. According to Maine law, an applicant may qualify for the Master Plumber examination with a
minimum of at least one year (2,000 hours) of work as a licensed journeyman plumber OR with a
minimum of how many years and hours of work as a licensed trainee plumber under the supervision of a
licensed master plumber?
A) 2 years with 4,000 hours
B) 3 years with 6,000 hours
C) 4 years with 8,000 hours
D) 5 years with 10,000 hours
Answer: C - The board may issue a master plumber license to a person who provides satisfactory
evidence of a minimum of at least one year with 2,000 hours of work as a journeyman plumber OR a
minimum of at least 4 years with 8,000 hours of work as a trainee plumber under the supervision of a
master plumber .
---
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3. Which state agency is responsible for licensing and regulating plumbers in Maine, and which specific
board within that agency oversees the plumbing profession?
A) Maine Department of Environmental Protection; Water Quality Board
B) Department of Professional and Financial Regulation; Plumbers' Examining Board
C) Maine Department of Health and Human Services; Environmental Health Board
D) Department of Labor; Occupational Licensing Board
Answer: B - The Plumbers' Examining Board operates under the Department of Professional and
Financial Regulation (DPFR) . The board was established to preserve and protect the health of the
people of Maine by ensuring adequate safety and health standards for plumbing installations .
---
4. What is the current plumbing code adopted by the Maine Plumbers' Examining Board, and when did it
become effective?
A) 2018 Uniform Plumbing Code, effective January 1, 2020
