Michigan Plumbing Contractor Examination
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Answers) Plus Rationale 2027 Q&A| Instant
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1. What is the primary purpose of the Michigan Plumbing Code?
A. To establish voluntary plumbing recommendations
B. To regulate only residential plumbing fixtures
C. To establish minimum requirements for the design and installation of
plumbing systems
D. To regulate only plumbing contractors' business practices
Answer: C. To establish minimum requirements for the design and
installation of plumbing systems
Rationale: The plumbing code establishes enforceable requirements
for plumbing-system design, installation, replacement, alteration,
relocation, and use. It is intended to protect public health, safety, and
welfare by establishing minimum standards.
, 2. Which organization administers plumbing contractor licensing in
Michigan?
A. Michigan Department of Transportation
B. Michigan Department of Licensing and Regulatory Affairs
C. Michigan Department of Agriculture
D. Michigan State Police
Answer: B. Michigan Department of Licensing and Regulatory Affairs
Rationale: The Michigan Department of Licensing and Regulatory
Affairs (LARA), through the Bureau of Construction Codes and its
Licensing Division, administers plumbing licensing and examination
functions.
3. A Michigan plumbing contractor applicant must generally do
which of the following regarding a master plumber?
A. Employ an apprentice plumber only
B. Hold a master plumber license or employ a licensed master plumber
representative
C. Employ an electrical contractor
D. Hold a mechanical contractor license
Answer: B. Hold a master plumber license or employ a licensed
master plumber representative
,Rationale: Michigan requires a plumbing contractor to either hold a
master plumber license or employ a master plumber who serves as the
qualifying representative. The contractor license is not issued without
the required master plumber representation.
4. Which individual may apply for a Michigan plumbing contractor
license?
A. Any employee of a plumbing company
B. Only a licensed journey plumber
C. A sole proprietor, qualifying partner, corporate officer, or qualifying
LLC member
D. Only a plumbing apprentice
Answer: C. A sole proprietor, qualifying partner, corporate officer, or
qualifying LLC member
Rationale: Michigan law limits who may apply for a plumbing
contractor license on behalf of a business entity. The applicant must
occupy an ownership or qualifying organizational position specified by
law.
5. What is the primary function of a plumbing trap?
A. Increase water pressure
B. Prevent sewer gases from entering a building
, C. Increase drainage velocity
D. Prevent water from entering a fixture
Answer: B. Prevent sewer gases from entering a building
Rationale: A trap maintains a water seal between the fixture and the
drainage system. This water seal prevents objectionable sewer gases
from entering occupied spaces through the fixture drain.
6. Which fixture normally requires a trap?
A. Water heater supply line
B. Lavatory
C. Hose bibb supply
D. Water service entrance
Answer: B. Lavatory
Rationale: Plumbing fixtures that discharge into the sanitary drainage
system generally require an approved trap. A lavatory uses a P-trap to
maintain the required water seal.
7. What is the principal purpose of a plumbing vent system?
A. To increase water temperature
B. To supply drinking water
C. To protect trap seals and allow proper drainage-system air
Questions and Correct Answers (Verified
Answers) Plus Rationale 2027 Q&A| Instant
Download Pdf
1. What is the primary purpose of the Michigan Plumbing Code?
A. To establish voluntary plumbing recommendations
B. To regulate only residential plumbing fixtures
C. To establish minimum requirements for the design and installation of
plumbing systems
D. To regulate only plumbing contractors' business practices
Answer: C. To establish minimum requirements for the design and
installation of plumbing systems
Rationale: The plumbing code establishes enforceable requirements
for plumbing-system design, installation, replacement, alteration,
relocation, and use. It is intended to protect public health, safety, and
welfare by establishing minimum standards.
, 2. Which organization administers plumbing contractor licensing in
Michigan?
A. Michigan Department of Transportation
B. Michigan Department of Licensing and Regulatory Affairs
C. Michigan Department of Agriculture
D. Michigan State Police
Answer: B. Michigan Department of Licensing and Regulatory Affairs
Rationale: The Michigan Department of Licensing and Regulatory
Affairs (LARA), through the Bureau of Construction Codes and its
Licensing Division, administers plumbing licensing and examination
functions.
3. A Michigan plumbing contractor applicant must generally do
which of the following regarding a master plumber?
A. Employ an apprentice plumber only
B. Hold a master plumber license or employ a licensed master plumber
representative
C. Employ an electrical contractor
D. Hold a mechanical contractor license
Answer: B. Hold a master plumber license or employ a licensed
master plumber representative
,Rationale: Michigan requires a plumbing contractor to either hold a
master plumber license or employ a master plumber who serves as the
qualifying representative. The contractor license is not issued without
the required master plumber representation.
4. Which individual may apply for a Michigan plumbing contractor
license?
A. Any employee of a plumbing company
B. Only a licensed journey plumber
C. A sole proprietor, qualifying partner, corporate officer, or qualifying
LLC member
D. Only a plumbing apprentice
Answer: C. A sole proprietor, qualifying partner, corporate officer, or
qualifying LLC member
Rationale: Michigan law limits who may apply for a plumbing
contractor license on behalf of a business entity. The applicant must
occupy an ownership or qualifying organizational position specified by
law.
5. What is the primary function of a plumbing trap?
A. Increase water pressure
B. Prevent sewer gases from entering a building
, C. Increase drainage velocity
D. Prevent water from entering a fixture
Answer: B. Prevent sewer gases from entering a building
Rationale: A trap maintains a water seal between the fixture and the
drainage system. This water seal prevents objectionable sewer gases
from entering occupied spaces through the fixture drain.
6. Which fixture normally requires a trap?
A. Water heater supply line
B. Lavatory
C. Hose bibb supply
D. Water service entrance
Answer: B. Lavatory
Rationale: Plumbing fixtures that discharge into the sanitary drainage
system generally require an approved trap. A lavatory uses a P-trap to
maintain the required water seal.
7. What is the principal purpose of a plumbing vent system?
A. To increase water temperature
B. To supply drinking water
C. To protect trap seals and allow proper drainage-system air
