Page 1 of 35
MICHIGAN PLUMBING CONTRACTOR EXAM COMPREHENSIVE
QUESTIONS AND CORRECT ANSWERS LATEST EDITION 2026
MICHIGAN PLUMBING CONTRACTOR EXAM: QUESTIONS WITH RATIONALES
SUMMARIZED 10-POINT EXAM COVERAGE
1. Licensing & Administration (MCL 339.6101–339.6133): Contractor qualifications, master
plumber requirements, license issuance, and joint responsibility.
2. Michigan Plumbing Code – Chapter 1: Scope & Administration: Code adoption, permits,
inspections, and enforcement procedures.
3. General Regulations (Ch. 3): Pipe materials, joint connections, support, protection, and
testing.
4. Fixtures, Faucets & Fixture Fittings (Ch. 4): Minimum fixture requirements, clearances,
and installation standards.
5. Water Heaters (Ch. 5): Installation, temperature/pressure relief valves, and venting
requirements.
6. Water Supply & Distribution (Ch. 6): Pipe sizing, water service requirements, backflow
prevention, and water pressure.
7. Sanitary Drainage (Ch. 7): Drain pipe sizing, slope requirements, cleanouts, and building
drains.
8. Vents (Ch. 9) & Traps (Ch. 10): Vent types, trap seal protection, and distance of trap from
vent.
9. Special Piping & Nonpotable Water (Ch. 12–14): Medical gas piping, graywater systems,
and subsurface absorption.
10. Michigan Administrative Rules – Part 7 Plumbing Code: Michigan-specific amendments
to the IPC, including Rule 701, venting rules, and fixture requirements.
1|Page
,Page 2 of 35
SECTION 1: LICENSING & ADMINISTRATION
Questions 1–15
Question 1
To qualify for a plumbing contractor license in Michigan, the applicant must either hold a
master plumber license or:
A) Have 5 years of experience as a journey plumber
B) Employ the holder of a master plumber license as their representative
C) Pass the journey plumber examination
D) Be a licensed building official
Answer: B
Rationale: Under MCL 339.6111(1), to qualify for a plumbing contractor license, the applicant
must either hold a master plumber license or employ the holder of a master plumber license as
his or her representative. This ensures that a qualified master plumber oversees all plumbing
operations for code compliance.
Question 2
Which of the following individuals may apply for licensure as a plumbing contractor?
A) Any journey plumber
B) Any registered plumbing apprentice
C) A sole proprietor, partner, corporate officer, or LLC member
D) Any employee of a plumbing company
Answer: C
Rationale: Under MCL 339.6111(2), only an individual who is a sole proprietor, a partner in a
partnership, an officer of a corporation, or a member of a limited liability company may apply
for licensure as a plumbing contractor.
Question 3
If a plumbing contractor is represented by a licensed master plumber who ceases to represent
the contractor, how long does the contractor have to designate another master plumber?
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,Page 3 of 35
A) 10 days
B) 15 days
C) 30 days
D) 60 days
Answer: C
Rationale: Under MCL 339.6111(7), if a master plumber ceases to represent the plumbing
contractor, the contractor has 30 days to designate another licensed master plumber as the
representative and must notify the department in writing.
Question 4
What is the examination fee for the Michigan Plumbing Contractor exam?
A) $50
B) $75
C) $100
D) $300
Answer: C
Rationale: The plumbing contractor's exam fee is $100, payable to PSI Services, which
administers the examination for the Bureau of Construction Codes.
Question 5
A licensed plumbing contractor must display a sign at the entrance of their place of business
that includes the name of the business and:
A) The business owner's home address
B) The name and license number of the master plumber in letters at least 3 inches high
C) The contractor's license number only
D) The hours of operation
Answer: B
Rationale: Under MCL 339.6111(8), a licensed plumbing contractor shall display a sign at the
entrance of the place of business that states the name of the business and the name of the
licensed master plumber and license number in letters at least 3 inches high.
Question 6
How many plumbing contractor licenses can a master plumber "qualify" at one time?
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A) One
B) Two
C) Three
D) Unlimited
Answer: A
Rationale: A master plumber can only "qualify" one plumbing contractor license at a time. The
state will not issue a plumbing contractor license without an associated master plumber license.
Question 7
The Michigan Plumbing Contractor examination consists of how many multiple-choice
questions?
A) 50
B) 100
C) 130
D) 150
Answer: A
Rationale: The contractor examination consists of 50 multiple-choice questions answered on a
machine-graded form, conducted for two hours. Candidates must receive a minimum of 70% to
qualify for a license.
Question 8
What is the minimum passing score for the Michigan Plumbing Contractor exam?
A) 60%
B) 65%
C) 70%
D) 75%
Answer: C
Rationale: Candidates must receive a minimum of 70% to qualify for a license.
Question 9
Which of the following references is permitted to be taken into the Michigan Plumbing
Contractor examination?
4|Page
MICHIGAN PLUMBING CONTRACTOR EXAM COMPREHENSIVE
QUESTIONS AND CORRECT ANSWERS LATEST EDITION 2026
MICHIGAN PLUMBING CONTRACTOR EXAM: QUESTIONS WITH RATIONALES
SUMMARIZED 10-POINT EXAM COVERAGE
1. Licensing & Administration (MCL 339.6101–339.6133): Contractor qualifications, master
plumber requirements, license issuance, and joint responsibility.
2. Michigan Plumbing Code – Chapter 1: Scope & Administration: Code adoption, permits,
inspections, and enforcement procedures.
3. General Regulations (Ch. 3): Pipe materials, joint connections, support, protection, and
testing.
4. Fixtures, Faucets & Fixture Fittings (Ch. 4): Minimum fixture requirements, clearances,
and installation standards.
5. Water Heaters (Ch. 5): Installation, temperature/pressure relief valves, and venting
requirements.
6. Water Supply & Distribution (Ch. 6): Pipe sizing, water service requirements, backflow
prevention, and water pressure.
7. Sanitary Drainage (Ch. 7): Drain pipe sizing, slope requirements, cleanouts, and building
drains.
8. Vents (Ch. 9) & Traps (Ch. 10): Vent types, trap seal protection, and distance of trap from
vent.
9. Special Piping & Nonpotable Water (Ch. 12–14): Medical gas piping, graywater systems,
and subsurface absorption.
10. Michigan Administrative Rules – Part 7 Plumbing Code: Michigan-specific amendments
to the IPC, including Rule 701, venting rules, and fixture requirements.
1|Page
,Page 2 of 35
SECTION 1: LICENSING & ADMINISTRATION
Questions 1–15
Question 1
To qualify for a plumbing contractor license in Michigan, the applicant must either hold a
master plumber license or:
A) Have 5 years of experience as a journey plumber
B) Employ the holder of a master plumber license as their representative
C) Pass the journey plumber examination
D) Be a licensed building official
Answer: B
Rationale: Under MCL 339.6111(1), to qualify for a plumbing contractor license, the applicant
must either hold a master plumber license or employ the holder of a master plumber license as
his or her representative. This ensures that a qualified master plumber oversees all plumbing
operations for code compliance.
Question 2
Which of the following individuals may apply for licensure as a plumbing contractor?
A) Any journey plumber
B) Any registered plumbing apprentice
C) A sole proprietor, partner, corporate officer, or LLC member
D) Any employee of a plumbing company
Answer: C
Rationale: Under MCL 339.6111(2), only an individual who is a sole proprietor, a partner in a
partnership, an officer of a corporation, or a member of a limited liability company may apply
for licensure as a plumbing contractor.
Question 3
If a plumbing contractor is represented by a licensed master plumber who ceases to represent
the contractor, how long does the contractor have to designate another master plumber?
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,Page 3 of 35
A) 10 days
B) 15 days
C) 30 days
D) 60 days
Answer: C
Rationale: Under MCL 339.6111(7), if a master plumber ceases to represent the plumbing
contractor, the contractor has 30 days to designate another licensed master plumber as the
representative and must notify the department in writing.
Question 4
What is the examination fee for the Michigan Plumbing Contractor exam?
A) $50
B) $75
C) $100
D) $300
Answer: C
Rationale: The plumbing contractor's exam fee is $100, payable to PSI Services, which
administers the examination for the Bureau of Construction Codes.
Question 5
A licensed plumbing contractor must display a sign at the entrance of their place of business
that includes the name of the business and:
A) The business owner's home address
B) The name and license number of the master plumber in letters at least 3 inches high
C) The contractor's license number only
D) The hours of operation
Answer: B
Rationale: Under MCL 339.6111(8), a licensed plumbing contractor shall display a sign at the
entrance of the place of business that states the name of the business and the name of the
licensed master plumber and license number in letters at least 3 inches high.
Question 6
How many plumbing contractor licenses can a master plumber "qualify" at one time?
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, Page 4 of 35
A) One
B) Two
C) Three
D) Unlimited
Answer: A
Rationale: A master plumber can only "qualify" one plumbing contractor license at a time. The
state will not issue a plumbing contractor license without an associated master plumber license.
Question 7
The Michigan Plumbing Contractor examination consists of how many multiple-choice
questions?
A) 50
B) 100
C) 130
D) 150
Answer: A
Rationale: The contractor examination consists of 50 multiple-choice questions answered on a
machine-graded form, conducted for two hours. Candidates must receive a minimum of 70% to
qualify for a license.
Question 8
What is the minimum passing score for the Michigan Plumbing Contractor exam?
A) 60%
B) 65%
C) 70%
D) 75%
Answer: C
Rationale: Candidates must receive a minimum of 70% to qualify for a license.
Question 9
Which of the following references is permitted to be taken into the Michigan Plumbing
Contractor examination?
4|Page
