MICHIGAN PLUMBING CONTRACTOR EXAM
QUESTIONS WITH CORRECT ANSWERS 2026
MICHIGAN PLUMBING CONTRACTOR EXAM QUESTIONS WITH CORRECT
ANSWERS 2026
Reference basis: This practice examination is designed around Michigan’s current 2021
Michigan Plumbing Code, effective March 12, 2024, together with applicable Michigan
plumbing licensing and administrative requirements. Michigan’s official materials indicate that
the 2021 Michigan Plumbing Code is the current plumbing code, while proposed adoption of the
2024 IPC was under rulemaking in 2026 and therefore is not treated here as the current code.
Michigan’s plumbing contractor licensing requirements include examination requirements and
the requirement that the contractor either hold a master plumber license or employ a master
plumber as the representative; the contractor examination covers the state plumbing act,
construction-code requirements, and administration and enforcement of the plumbing code.
Table of Contents
Module Topic Questions Distribution
1 Michigan Licensing, Law & Contractor Administration 20 1–20
2 General Plumbing Principles & Materials 20 21–40
3 Water Supply & Distribution Systems 20 41–60
4 Backflow Prevention & Potable Water Protection 20 61–80
5 Sanitary Drainage, Waste & Vent Systems 20 81–100
6 Traps, Vents & Indirect/Special Waste 20 101–120
7 Fixtures, Equipment & Specialty Plumbing 20 121–140
8 Storm Drainage, Sewers & Site Plumbing 20 141–160
9 Safety, Testing, Inspection & Code Administration 20 161–180
Contractor Estimating, Plans, Troubleshooting & Integrated
10 20 181–200
Scenarios
,Module Topic Questions Distribution
Total Comprehensive practice examination 200 1–200
Module 1 — Michigan Licensing, Law & Contractor Administration
Question 1
Which Michigan license is specifically associated with a person who contracts to perform
plumbing work as a plumbing contractor?
A. Plumbing apprentice registration
B. Journey plumber license
C. Master plumber license
D. Plumbing contractor license
Correct Answer: D
Rationale: The plumbing contractor license authorizes the licensed business/person to operate as
a plumbing contractor under Michigan law. A journey or master plumber license establishes an
individual's plumbing qualifications but is not itself the plumbing contractor business license.
Question 2
A Michigan plumbing contractor applicant does not personally hold a master plumber license.
Which condition is necessary for the contractor license to be issued?
A. The applicant must employ a journey plumber only
B. The applicant must employ or otherwise have a master plumber serving as the representative
C. The applicant must employ two apprentices
D. The applicant must obtain an electrical contractor license
Correct Answer: B
Rationale: Michigan requires a plumbing contractor either to hold a master plumber license or
employ a master plumber as the representative. A journey plumber does not satisfy this specific
contractor-representation requirement.
Question 3
Under Michigan licensing requirements, which individual may apply for a plumbing contractor
license?
A. Any unregistered plumbing apprentice
B. Only a licensed journey plumber
,C. A sole proprietor, qualifying partner, corporate officer, or qualifying LLC member
D. Only a municipal plumbing inspector
Correct Answer: C
Rationale: Michigan identifies specific business roles eligible to apply, including sole
proprietors, partners, corporate officers, and members of limited liability companies. An
apprentice or inspector does not automatically qualify merely by virtue of that occupational
status.
Question 4
What is the primary purpose of requiring a master plumber to represent a Michigan plumbing
contractor?
A. To establish responsibility for code compliance
B. To eliminate permit requirements
C. To allow electrical work without licensing
D. To replace municipal inspection
Correct Answer: A
Rationale: The master plumber representative is the individual responsible for plumbing-code
compliance associated with the contractor operation. The representation requirement does not
eliminate permits, inspections, or other applicable licenses.
Question 5
A plumbing contractor changes the master plumber who represents the company. What is the
most appropriate administrative action?
A. Ignore the change until the next license renewal
B. Report the change through the appropriate Michigan licensing process
C. Immediately surrender all plumbing permits
D. Reapply as a plumbing apprentice
Correct Answer: B
Rationale: Changes involving the contractor's qualifying or representative master plumber must
be handled through Michigan's licensing procedures. Waiting until renewal can create licensing
and compliance problems.
Question 6
Which agency administers Michigan's Bureau of Construction Codes licensing functions relevant
to plumbing?
, A. Michigan Department of State Police
B. Michigan Department of Licensing and Regulatory Affairs
C. Michigan Department of Treasury
D. Michigan Department of Transportation
Correct Answer: B
Rationale: The Bureau of Construction Codes is part of the Michigan Department of Licensing
and Regulatory Affairs (LARA). The other agencies listed have different governmental
responsibilities.
Question 7
Michigan's current plumbing code is based primarily on which model code edition?
A. 2012 IPC
B. 2015 IPC
C. 2018 IPC
D. 2021 IPC
Correct Answer: D
Rationale: Michigan's current Part 7 Plumbing Code adopts the 2021 International Plumbing
Code with Michigan amendments, additions, and deletions. The 2018 edition was part of the
preceding code cycle.
Question 8
A contractor encounters a conflict between a provision of the Michigan Plumbing Code and a
controlling provision of Michigan statute. Which governs?
A. The plumbing contractor's interpretation
B. The manufacturer's installation manual
C. The controlling statute
D. The older model-code provision
Correct Answer: C
Rationale: Michigan's Part 7 rules expressly recognize that the applicable Michigan construction
statute takes precedence over conflicting provisions of the plumbing code. A contractor should
therefore resolve statutory conflicts according to the governing law.
Question 9
What is the principal regulatory objective of the Michigan Plumbing Code?
A. Maximize contractor profitability
B. Establish minimum standards for health, safety, property protection, and public welfare
QUESTIONS WITH CORRECT ANSWERS 2026
MICHIGAN PLUMBING CONTRACTOR EXAM QUESTIONS WITH CORRECT
ANSWERS 2026
Reference basis: This practice examination is designed around Michigan’s current 2021
Michigan Plumbing Code, effective March 12, 2024, together with applicable Michigan
plumbing licensing and administrative requirements. Michigan’s official materials indicate that
the 2021 Michigan Plumbing Code is the current plumbing code, while proposed adoption of the
2024 IPC was under rulemaking in 2026 and therefore is not treated here as the current code.
Michigan’s plumbing contractor licensing requirements include examination requirements and
the requirement that the contractor either hold a master plumber license or employ a master
plumber as the representative; the contractor examination covers the state plumbing act,
construction-code requirements, and administration and enforcement of the plumbing code.
Table of Contents
Module Topic Questions Distribution
1 Michigan Licensing, Law & Contractor Administration 20 1–20
2 General Plumbing Principles & Materials 20 21–40
3 Water Supply & Distribution Systems 20 41–60
4 Backflow Prevention & Potable Water Protection 20 61–80
5 Sanitary Drainage, Waste & Vent Systems 20 81–100
6 Traps, Vents & Indirect/Special Waste 20 101–120
7 Fixtures, Equipment & Specialty Plumbing 20 121–140
8 Storm Drainage, Sewers & Site Plumbing 20 141–160
9 Safety, Testing, Inspection & Code Administration 20 161–180
Contractor Estimating, Plans, Troubleshooting & Integrated
10 20 181–200
Scenarios
,Module Topic Questions Distribution
Total Comprehensive practice examination 200 1–200
Module 1 — Michigan Licensing, Law & Contractor Administration
Question 1
Which Michigan license is specifically associated with a person who contracts to perform
plumbing work as a plumbing contractor?
A. Plumbing apprentice registration
B. Journey plumber license
C. Master plumber license
D. Plumbing contractor license
Correct Answer: D
Rationale: The plumbing contractor license authorizes the licensed business/person to operate as
a plumbing contractor under Michigan law. A journey or master plumber license establishes an
individual's plumbing qualifications but is not itself the plumbing contractor business license.
Question 2
A Michigan plumbing contractor applicant does not personally hold a master plumber license.
Which condition is necessary for the contractor license to be issued?
A. The applicant must employ a journey plumber only
B. The applicant must employ or otherwise have a master plumber serving as the representative
C. The applicant must employ two apprentices
D. The applicant must obtain an electrical contractor license
Correct Answer: B
Rationale: Michigan requires a plumbing contractor either to hold a master plumber license or
employ a master plumber as the representative. A journey plumber does not satisfy this specific
contractor-representation requirement.
Question 3
Under Michigan licensing requirements, which individual may apply for a plumbing contractor
license?
A. Any unregistered plumbing apprentice
B. Only a licensed journey plumber
,C. A sole proprietor, qualifying partner, corporate officer, or qualifying LLC member
D. Only a municipal plumbing inspector
Correct Answer: C
Rationale: Michigan identifies specific business roles eligible to apply, including sole
proprietors, partners, corporate officers, and members of limited liability companies. An
apprentice or inspector does not automatically qualify merely by virtue of that occupational
status.
Question 4
What is the primary purpose of requiring a master plumber to represent a Michigan plumbing
contractor?
A. To establish responsibility for code compliance
B. To eliminate permit requirements
C. To allow electrical work without licensing
D. To replace municipal inspection
Correct Answer: A
Rationale: The master plumber representative is the individual responsible for plumbing-code
compliance associated with the contractor operation. The representation requirement does not
eliminate permits, inspections, or other applicable licenses.
Question 5
A plumbing contractor changes the master plumber who represents the company. What is the
most appropriate administrative action?
A. Ignore the change until the next license renewal
B. Report the change through the appropriate Michigan licensing process
C. Immediately surrender all plumbing permits
D. Reapply as a plumbing apprentice
Correct Answer: B
Rationale: Changes involving the contractor's qualifying or representative master plumber must
be handled through Michigan's licensing procedures. Waiting until renewal can create licensing
and compliance problems.
Question 6
Which agency administers Michigan's Bureau of Construction Codes licensing functions relevant
to plumbing?
, A. Michigan Department of State Police
B. Michigan Department of Licensing and Regulatory Affairs
C. Michigan Department of Treasury
D. Michigan Department of Transportation
Correct Answer: B
Rationale: The Bureau of Construction Codes is part of the Michigan Department of Licensing
and Regulatory Affairs (LARA). The other agencies listed have different governmental
responsibilities.
Question 7
Michigan's current plumbing code is based primarily on which model code edition?
A. 2012 IPC
B. 2015 IPC
C. 2018 IPC
D. 2021 IPC
Correct Answer: D
Rationale: Michigan's current Part 7 Plumbing Code adopts the 2021 International Plumbing
Code with Michigan amendments, additions, and deletions. The 2018 edition was part of the
preceding code cycle.
Question 8
A contractor encounters a conflict between a provision of the Michigan Plumbing Code and a
controlling provision of Michigan statute. Which governs?
A. The plumbing contractor's interpretation
B. The manufacturer's installation manual
C. The controlling statute
D. The older model-code provision
Correct Answer: C
Rationale: Michigan's Part 7 rules expressly recognize that the applicable Michigan construction
statute takes precedence over conflicting provisions of the plumbing code. A contractor should
therefore resolve statutory conflicts according to the governing law.
Question 9
What is the principal regulatory objective of the Michigan Plumbing Code?
A. Maximize contractor profitability
B. Establish minimum standards for health, safety, property protection, and public welfare
