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Michigan Plumbing Contractor Exam — Comprehensive Practice
Question Bank (Verified Update!!!)
Format: Question → Answer → Detailed Rationale | Complete
Verified Questions | Graded A+
Exam Overview: The Michigan Plumbing Contractor exam is
administered by PSI Services LLC under the authority of the Michigan
Department of Licensing and Regulatory Affairs (LARA), Bureau of
Construction Codes. The Plumbing Contractor exam consists of 50
multiple-choice questions to be completed within 120 minutes, and
candidates must achieve a minimum score of 70% to pass. The exam is
open-book, using the Michigan Plumbing Code and the State Plumbing
Act, 2002 PA 733. The exam fee is $100, and candidates may retest on
an unlimited basis. Beginning February 11, 2026, the Master Plumber
and Plumbing Contractor examinations may be taken online.
Coverage: Licensing & Regulatory Framework, Plumbing Code General
Regulations, Drainage Systems, Vents & Venting, Traps & Cleanouts,
Water Supply & Distribution, Fixtures & Fixture Fittings, Backflow
Prevention, Storm & Special Waste, Testing & Inspections, Safety &
MIOSHA, and Business Practices.
SECTION 1: LICENSING & REGULATORY FRAMEWORK
(Questions)
Licensing Authority & Requirements
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1. Which entity is primarily responsible for issuing plumbing
contractor licenses in Michigan?
A) Michigan Department of Treasury
B) Michigan Department of Licensing and Regulatory Affairs
(LARA)
C) Michigan Department of Health and Human Services
D) Michigan Department of Labor
Correct Answer: B
Rationale: LARA, through the State Plumbing Board,
administers licensing for plumbing contractors.
2. Under the Skilled Trades Regulation Act (PA 407), a
plumbing contractor may operate as which of the following
business structures?
A) Sole proprietorship only
B) Partnership, corporation, LLC, or sole proprietorship
C) Non-profit organization only
D) Joint venture with a licensed electrician
Correct Answer: B
Rationale: The Act permits any of those legal entities provided
the contractor holds a valid plumbing license.
3. To qualify for a plumbing contractor license in Michigan, the
applicant must either hold a master plumber license or:
A) Employ two journey plumbers
B) Employ the holder of a master plumber license as his or her
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representative
C) Hold a mechanical contractor license
D) Have five years of estimating experience
Correct Answer: B
Rationale: The plumbing contractor must have a licensed
master plumber associated with the business for code
compliance.
4. Who may apply for a plumbing contractor license in
Michigan?
A) Any registered plumbing apprentice
B) Any journey plumber
C) A sole proprietor, partner, corporate officer, or LLC member
D) Any employee of a licensed plumbing company
Correct Answer: C
Rationale: Michigan law limits who may apply for a plumbing
contractor license to the specified business ownership or
corporate positions.
5. How often must a Michigan plumbing contractor renew its
license?
A) Every year
B) Every 2 years
C) Every 3 years
D) Every 5 years
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Correct Answer: C
Rationale: Licenses are renewed on a three-year cycle.
6. When a Master Plumber ceases to represent a contractor,
the contractor must:
A) Wait 30 days before notifying anyone
B) Immediately notify LARA in writing
C) File a complaint with the Michigan Supreme Court
D) Replace the Master Plumber without any notification
Correct Answer: B
Rationale: Michigan law requires prompt written notification to
LARA of any change in representation.
7. What is the required display for a licensed plumbing
contractor on a work vehicle in Michigan?
A) License number on the rear bumper only
B) Full business name and license number on both sides of the
vehicle
C) License number on the driver's side door only
D) No display is required for vehicles
Correct Answer: B
Rationale: Michigan law requires the contractor's full business
name and license number to be visible on both sides of any
work vehicle.
8. A "show cause" hearing under the Skilled Trades Regulation
Act is initiated when:
Michigan Plumbing Contractor Exam — Comprehensive Practice
Question Bank (Verified Update!!!)
Format: Question → Answer → Detailed Rationale | Complete
Verified Questions | Graded A+
Exam Overview: The Michigan Plumbing Contractor exam is
administered by PSI Services LLC under the authority of the Michigan
Department of Licensing and Regulatory Affairs (LARA), Bureau of
Construction Codes. The Plumbing Contractor exam consists of 50
multiple-choice questions to be completed within 120 minutes, and
candidates must achieve a minimum score of 70% to pass. The exam is
open-book, using the Michigan Plumbing Code and the State Plumbing
Act, 2002 PA 733. The exam fee is $100, and candidates may retest on
an unlimited basis. Beginning February 11, 2026, the Master Plumber
and Plumbing Contractor examinations may be taken online.
Coverage: Licensing & Regulatory Framework, Plumbing Code General
Regulations, Drainage Systems, Vents & Venting, Traps & Cleanouts,
Water Supply & Distribution, Fixtures & Fixture Fittings, Backflow
Prevention, Storm & Special Waste, Testing & Inspections, Safety &
MIOSHA, and Business Practices.
SECTION 1: LICENSING & REGULATORY FRAMEWORK
(Questions)
Licensing Authority & Requirements
, Page |2
1. Which entity is primarily responsible for issuing plumbing
contractor licenses in Michigan?
A) Michigan Department of Treasury
B) Michigan Department of Licensing and Regulatory Affairs
(LARA)
C) Michigan Department of Health and Human Services
D) Michigan Department of Labor
Correct Answer: B
Rationale: LARA, through the State Plumbing Board,
administers licensing for plumbing contractors.
2. Under the Skilled Trades Regulation Act (PA 407), a
plumbing contractor may operate as which of the following
business structures?
A) Sole proprietorship only
B) Partnership, corporation, LLC, or sole proprietorship
C) Non-profit organization only
D) Joint venture with a licensed electrician
Correct Answer: B
Rationale: The Act permits any of those legal entities provided
the contractor holds a valid plumbing license.
3. To qualify for a plumbing contractor license in Michigan, the
applicant must either hold a master plumber license or:
A) Employ two journey plumbers
B) Employ the holder of a master plumber license as his or her
, Page |3
representative
C) Hold a mechanical contractor license
D) Have five years of estimating experience
Correct Answer: B
Rationale: The plumbing contractor must have a licensed
master plumber associated with the business for code
compliance.
4. Who may apply for a plumbing contractor license in
Michigan?
A) Any registered plumbing apprentice
B) Any journey plumber
C) A sole proprietor, partner, corporate officer, or LLC member
D) Any employee of a licensed plumbing company
Correct Answer: C
Rationale: Michigan law limits who may apply for a plumbing
contractor license to the specified business ownership or
corporate positions.
5. How often must a Michigan plumbing contractor renew its
license?
A) Every year
B) Every 2 years
C) Every 3 years
D) Every 5 years
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Correct Answer: C
Rationale: Licenses are renewed on a three-year cycle.
6. When a Master Plumber ceases to represent a contractor,
the contractor must:
A) Wait 30 days before notifying anyone
B) Immediately notify LARA in writing
C) File a complaint with the Michigan Supreme Court
D) Replace the Master Plumber without any notification
Correct Answer: B
Rationale: Michigan law requires prompt written notification to
LARA of any change in representation.
7. What is the required display for a licensed plumbing
contractor on a work vehicle in Michigan?
A) License number on the rear bumper only
B) Full business name and license number on both sides of the
vehicle
C) License number on the driver's side door only
D) No display is required for vehicles
Correct Answer: B
Rationale: Michigan law requires the contractor's full business
name and license number to be visible on both sides of any
work vehicle.
8. A "show cause" hearing under the Skilled Trades Regulation
Act is initiated when:
