Page 1 of 41
WISCONSIN UDC PLUMBING INSPECTOR EXAM
PRACTICE EXAM 2026/2027 COMPLETE (100) CURRENT
TESTING QUESTIONS AND CORRECT ANSWERS WITH
DETAILED RATIONALES.
PLUMBING
Prepare for the Wisconsin Uniform Dwelling Code (UDC) Plumbing Inspector Exam
Practice with a focused study resource designed to reinforce key plumbing inspection
and code-compliance concepts. It supports review of Wisconsin plumbing
regulations, residential plumbing systems, piping, drainage and venting, fixtures,
inspection requirements, and applicable UDC provisions. Use the material to
strengthen code application, improve inspection judgment, and identify areas that
may require additional review before the exam. This resource is best suited for
Wisconsin UDC plumbing inspector candidates, plumbers, building officials, code
enforcement professionals, and residential construction inspectors preparing for
certification.
MULTIPLE CHOICE.
SECTION 1: LICENSING, ADMINISTRATION, AND CREDENTIALING
(Questions 1–15)
Question 1:
Which Wisconsin Administrative Code section outlines the credential
requirements for a UDC Plumbing Inspector?
A) SPS 300
B) SPS 305
C) SPS 320
D) SPS 382
Answer: B) SPS 305
Rationale: SPS 305 specifically governs licensing, certification, and
credentialing for plumbing inspectors in Wisconsin. SPS 320-325 covers
the Uniform Dwelling Code construction standards; SPS 381-387 covers
the Plumbing Code; SPS 300 is not a valid code section for this purpose.
, Page 2 of 41
Question 2:
Which Wisconsin statute provides the statutory authority for the UDC
Plumbing Inspector certification program?
A) Wis. Stat. § 101.66(2)
B) Wis. Stat. § 145.06
C) Wis. Stat. § 66.01
D) Wis. Stat. § 30.01
Answer: A) Wis. Stat. § 101.66(2)
Rationale: Under Wis. Stat. § 101.66(2), no person may conduct the
inspection of one- and two-family dwellings for the purpose of
administering and enforcing SPS 325 and SPS 382 and 384 unless the
person holds a credential issued by the department as a certified UDC-
plumbing inspector.
Question 3:
What is the passing score for the Wisconsin UDC Plumbing Inspector exam?
A) 60%
B) 70%
C) 75%
D) 80%
Answer: B) 70%
Rationale: The DSPS requires a minimum score of 70% to pass the UDC
Plumbing Inspector certification exam.
Question 4:
How often must a Wisconsin UDC Plumbing Inspector renew their credential?
A) Every 1 year
B) Every 2 years
C) Every 4 years (expires June 30)
D) Every 5 years
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Answer: C) Every 4 years (expires June 30)
Rationale: The credential, which is issued after the exam is passed and
the prorated credential fee paid, is effective for four years from June 30.
Question 5:
What is the application and exam fee for the Wisconsin UDC Plumbing
Inspector certification?
A) $25
B) $40
C) $50
D) $80
Answer: B) $40
Rationale: The fee consists of a $15 application fee and an exam fee of
$25, totaling $40.
Question 6:
According to Wisconsin law, a certified UDC-Plumbing Inspector must carry
their credential:
A) Only when performing inspections for a fee
B) On their person while performing inspections
C) Only when requested by the property owner
D) In their vehicle at all times
Answer: B) On their person while performing inspections
Rationale: A certified UDC-plumbing inspector shall carry on their person
the credential issued by the department while performing the activities
permitted.
Question 7:
Which of the following is a requirement for a certified UDC Plumbing
Inspector?
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A) Maintain a record of inspections, including dates and findings
B) Provide a copy of the inspection report to the property owner
C) Make inspection records available to the department upon request
D) All of the above
Answer: D) All of the above
Rationale: A certified UDC-plumbing inspector shall: maintain a record of
inspections including dates and findings; provide a copy of the inspection
report to the property owner; carry the credential on their person; and
make inspection records available to the department upon request.
Question 8:
Under Wisconsin law, a person may be prohibited from inspecting a project if
the inspector has:
A) A professional license in another state
B) A financial interest in the contractor's business
C) Prior inspection experience
D) A family member living in the dwelling
Answer: B) A financial interest in the contractor's business
Rationale: A financial interest creates a conflict of interest, which is
prohibited by ethical standards for inspectors. Inspectors must maintain
impartiality and avoid any appearance of impropriety.
Question 9:
What is the credential fee for a Wisconsin UDC Plumbing Inspector after
passing the exam?
A) $25
B) $40 (prorated based on expiration date)
C) $50
D) $100
Answer: B) $40 (prorated based on expiration date)
WISCONSIN UDC PLUMBING INSPECTOR EXAM
PRACTICE EXAM 2026/2027 COMPLETE (100) CURRENT
TESTING QUESTIONS AND CORRECT ANSWERS WITH
DETAILED RATIONALES.
PLUMBING
Prepare for the Wisconsin Uniform Dwelling Code (UDC) Plumbing Inspector Exam
Practice with a focused study resource designed to reinforce key plumbing inspection
and code-compliance concepts. It supports review of Wisconsin plumbing
regulations, residential plumbing systems, piping, drainage and venting, fixtures,
inspection requirements, and applicable UDC provisions. Use the material to
strengthen code application, improve inspection judgment, and identify areas that
may require additional review before the exam. This resource is best suited for
Wisconsin UDC plumbing inspector candidates, plumbers, building officials, code
enforcement professionals, and residential construction inspectors preparing for
certification.
MULTIPLE CHOICE.
SECTION 1: LICENSING, ADMINISTRATION, AND CREDENTIALING
(Questions 1–15)
Question 1:
Which Wisconsin Administrative Code section outlines the credential
requirements for a UDC Plumbing Inspector?
A) SPS 300
B) SPS 305
C) SPS 320
D) SPS 382
Answer: B) SPS 305
Rationale: SPS 305 specifically governs licensing, certification, and
credentialing for plumbing inspectors in Wisconsin. SPS 320-325 covers
the Uniform Dwelling Code construction standards; SPS 381-387 covers
the Plumbing Code; SPS 300 is not a valid code section for this purpose.
, Page 2 of 41
Question 2:
Which Wisconsin statute provides the statutory authority for the UDC
Plumbing Inspector certification program?
A) Wis. Stat. § 101.66(2)
B) Wis. Stat. § 145.06
C) Wis. Stat. § 66.01
D) Wis. Stat. § 30.01
Answer: A) Wis. Stat. § 101.66(2)
Rationale: Under Wis. Stat. § 101.66(2), no person may conduct the
inspection of one- and two-family dwellings for the purpose of
administering and enforcing SPS 325 and SPS 382 and 384 unless the
person holds a credential issued by the department as a certified UDC-
plumbing inspector.
Question 3:
What is the passing score for the Wisconsin UDC Plumbing Inspector exam?
A) 60%
B) 70%
C) 75%
D) 80%
Answer: B) 70%
Rationale: The DSPS requires a minimum score of 70% to pass the UDC
Plumbing Inspector certification exam.
Question 4:
How often must a Wisconsin UDC Plumbing Inspector renew their credential?
A) Every 1 year
B) Every 2 years
C) Every 4 years (expires June 30)
D) Every 5 years
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Answer: C) Every 4 years (expires June 30)
Rationale: The credential, which is issued after the exam is passed and
the prorated credential fee paid, is effective for four years from June 30.
Question 5:
What is the application and exam fee for the Wisconsin UDC Plumbing
Inspector certification?
A) $25
B) $40
C) $50
D) $80
Answer: B) $40
Rationale: The fee consists of a $15 application fee and an exam fee of
$25, totaling $40.
Question 6:
According to Wisconsin law, a certified UDC-Plumbing Inspector must carry
their credential:
A) Only when performing inspections for a fee
B) On their person while performing inspections
C) Only when requested by the property owner
D) In their vehicle at all times
Answer: B) On their person while performing inspections
Rationale: A certified UDC-plumbing inspector shall carry on their person
the credential issued by the department while performing the activities
permitted.
Question 7:
Which of the following is a requirement for a certified UDC Plumbing
Inspector?
, Page 4 of 41
A) Maintain a record of inspections, including dates and findings
B) Provide a copy of the inspection report to the property owner
C) Make inspection records available to the department upon request
D) All of the above
Answer: D) All of the above
Rationale: A certified UDC-plumbing inspector shall: maintain a record of
inspections including dates and findings; provide a copy of the inspection
report to the property owner; carry the credential on their person; and
make inspection records available to the department upon request.
Question 8:
Under Wisconsin law, a person may be prohibited from inspecting a project if
the inspector has:
A) A professional license in another state
B) A financial interest in the contractor's business
C) Prior inspection experience
D) A family member living in the dwelling
Answer: B) A financial interest in the contractor's business
Rationale: A financial interest creates a conflict of interest, which is
prohibited by ethical standards for inspectors. Inspectors must maintain
impartiality and avoid any appearance of impropriety.
Question 9:
What is the credential fee for a Wisconsin UDC Plumbing Inspector after
passing the exam?
A) $25
B) $40 (prorated based on expiration date)
C) $50
D) $100
Answer: B) $40 (prorated based on expiration date)
