Page 1 of 41
WISCONSIN UNIFORM DWELLING CODE PLUMBING
INSPECTOR EXAM — PRACTICE 2026/2027 COMPLETE
(100) CURRENT TESTING QUESTIONS AND CORRECT
ANSWERS WITH DETAILED RATIONALES.
PLUMBING
Prepare for the Wisconsin Uniform Dwelling Code Plumbing Inspector Exam Practice
with a focused study resource designed to reinforce essential residential plumbing
inspection concepts. It supports review of pipe sizing, water distribution, drain and
vent systems, traps, cleanouts, cross-connection control, backflow prevention, and
plumbing code requirements for one- and two-family dwellings. Use the material to
strengthen code knowledge, improve inspection judgment, and identify areas that
may require additional review before the examination. This resource is best suited for
Wisconsin UDC plumbing inspectors, residential construction professionals,
plumbers, code enforcement personnel, and candidates preparing for the UDC
Plumbing Inspector certification exam.
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.
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Question 2:
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 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
Answer: C) Every 4 years (expires June 30)
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Rationale: The credential is effective for four years from June 30. The
credential fee is prorated based on the expiration date.
Question 5:
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 6:
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 7:
Which entity has primary jurisdiction over plumbing inspections in
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Wisconsin?
A) Local homeowner associations
B) Wisconsin Department of Safety and Professional Services (DSPS)
C) Federal Housing Authority (FHA)
D) Local police departments
Answer: B) Wisconsin Department of Safety and Professional Services
(DSPS)
Rationale: The DSPS holds authority over plumbing inspections, with
certified UDC Plumbing Inspectors responsible for enforcement within
their jurisdictions.
Question 8:
A certified UDC Plumbing Inspector is authorized to inspect which types of
dwellings?
A) All commercial buildings
B) One- and two-family dwellings only
C) Apartment buildings with 10 or more units
D) Industrial facilities
Answer: B) One- and two-family dwellings only
Rationale: Certified UDC-plumbing inspectors or certified commercial
plumbing inspectors may inspect one- and two-family dwellings for the
purpose of administering and enforcing the plumbing code.
Question 9:
What is the credential fee for a Wisconsin UDC Plumbing Inspector after
passing the exam?
A) $25
B) $40 (prorated)
C) $50
D) $100
Answer: B) $40 (prorated)
WISCONSIN UNIFORM DWELLING CODE PLUMBING
INSPECTOR EXAM — PRACTICE 2026/2027 COMPLETE
(100) CURRENT TESTING QUESTIONS AND CORRECT
ANSWERS WITH DETAILED RATIONALES.
PLUMBING
Prepare for the Wisconsin Uniform Dwelling Code Plumbing Inspector Exam Practice
with a focused study resource designed to reinforce essential residential plumbing
inspection concepts. It supports review of pipe sizing, water distribution, drain and
vent systems, traps, cleanouts, cross-connection control, backflow prevention, and
plumbing code requirements for one- and two-family dwellings. Use the material to
strengthen code knowledge, improve inspection judgment, and identify areas that
may require additional review before the examination. This resource is best suited for
Wisconsin UDC plumbing inspectors, residential construction professionals,
plumbers, code enforcement personnel, and candidates preparing for the UDC
Plumbing Inspector certification exam.
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:
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 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
Answer: C) Every 4 years (expires June 30)
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Rationale: The credential is effective for four years from June 30. The
credential fee is prorated based on the expiration date.
Question 5:
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 6:
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 7:
Which entity has primary jurisdiction over plumbing inspections in
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Wisconsin?
A) Local homeowner associations
B) Wisconsin Department of Safety and Professional Services (DSPS)
C) Federal Housing Authority (FHA)
D) Local police departments
Answer: B) Wisconsin Department of Safety and Professional Services
(DSPS)
Rationale: The DSPS holds authority over plumbing inspections, with
certified UDC Plumbing Inspectors responsible for enforcement within
their jurisdictions.
Question 8:
A certified UDC Plumbing Inspector is authorized to inspect which types of
dwellings?
A) All commercial buildings
B) One- and two-family dwellings only
C) Apartment buildings with 10 or more units
D) Industrial facilities
Answer: B) One- and two-family dwellings only
Rationale: Certified UDC-plumbing inspectors or certified commercial
plumbing inspectors may inspect one- and two-family dwellings for the
purpose of administering and enforcing the plumbing code.
Question 9:
What is the credential fee for a Wisconsin UDC Plumbing Inspector after
passing the exam?
A) $25
B) $40 (prorated)
C) $50
D) $100
Answer: B) $40 (prorated)
