MINNEAPOLIS MASTER PLUMBER / GASFITTER EXAMINATION – 200
EXAM QUESTIONS WITH ANSWERS AND RATIONALES (
UPDATE)
1. Which Minnesota rule chapter contains the Minnesota Plumbing
Code?
A. Chapter 1300
B. Chapter 1346
C. Chapter 4714
D. Chapter 7511
Correct Answer: C
Rationale: Minnesota Rules Chapter 4714 contains the Minnesota
Plumbing Code. Chapter 1346 governs mechanical and fuel-gas systems,
making B the primary distractor.
2. Which Minnesota rule chapter contains the Minnesota Fuel Gas
Code?
A. Chapter 4714
B. Chapter 1346
C. Chapter 4716
D. Chapter 1305
Correct Answer: B
Rationale: Minnesota Rules Chapter 1346 contains the Minnesota Fuel
Gas Code. Chapter 4714 is the Minnesota Plumbing Code, so A
addresses plumbing rather than fuel gas.
,3. The Minnesota Fuel Gas Code incorporates which edition of the
International Fuel Gas Code as its principal model code?
A. 2015 IFGC
B. 2016 IFGC
C. 2018 IFGC
D. 2021 IFGC
Correct Answer: C
Rationale: Minnesota Rules Chapter 1346 incorporates Chapters 2
through 8 of the 2018 International Fuel Gas Code with Minnesota
amendments.
4. The 2020 Minnesota Plumbing Code primarily incorporates which
model plumbing code?
A. 2015 UPC
B. 2018 UPC
C. 2018 IPC
D. 2021 UPC
Correct Answer: B
Rationale: The 2020 Minnesota Plumbing Code incorporates the 2018
Uniform Plumbing Code with Minnesota amendments.
5. What is the principal purpose of a plumbing code?
A. Establish retail prices for plumbing materials
B. Regulate safe design and installation of plumbing systems
C. Establish employee wage classifications
D. Replace manufacturer installation instructions
,Correct Answer: B
Rationale: Plumbing codes establish minimum requirements for safe
plumbing design, materials, installation, and related systems.
6. Which state agency has statutory authority for plumbing licensing in
Minnesota?
A. The Minneapolis Building Inspections office
B. The MN Department of Labor and Industry (DLI)
C. The MN Department of Health
D. The MN Pollution Control Agency
Correct Answer: B
Rationale: DLI's Construction Codes and Licensing Division, under Minn.
Stat. ch. 326B, licenses plumbers statewide.
7. Under Minnesota law, who may serve as the licensed "responsible
master" authorized to obtain a plumbing permit for new construction?
A. Any registered apprentice
B. A licensed Master Plumber or Restricted Master Plumber
C. A journeyworker acting alone
D. A general contractor with no plumbing license
Correct Answer: B
Rationale: Permits for plumbing work are pulled under the license of a
Master Plumber (or Restricted Master Plumber acting within the scope
of that license), who assumes responsibility for the work.
, 8. What is the minimum age to hold an individual plumbing license or
registration in Minnesota?
A. 16
B. 18
C. 21
D. No minimum age applies
Correct Answer: B
Rationale: Applicants for any DLI plumbing registration or license must
be at least 18 years old.
9. What is the primary purpose of a plumbing vent system?
A. Increase water pressure
B. Remove solids from wastewater
C. Protect trap seals from siphonage and backpressure
D. Heat water in the system
Correct Answer: C
Rationale: Vent systems maintain atmospheric pressure in drainage
piping to prevent trap seal loss due to siphoning or backpressure
conditions.
10. The minimum slope for a 3-inch horizontal drainage pipe is
typically:
A. 1/16 inch per foot
B. 1/8 inch per foot
C. 1/4 inch per foot
D. 1/2 inch per foot
EXAM QUESTIONS WITH ANSWERS AND RATIONALES (
UPDATE)
1. Which Minnesota rule chapter contains the Minnesota Plumbing
Code?
A. Chapter 1300
B. Chapter 1346
C. Chapter 4714
D. Chapter 7511
Correct Answer: C
Rationale: Minnesota Rules Chapter 4714 contains the Minnesota
Plumbing Code. Chapter 1346 governs mechanical and fuel-gas systems,
making B the primary distractor.
2. Which Minnesota rule chapter contains the Minnesota Fuel Gas
Code?
A. Chapter 4714
B. Chapter 1346
C. Chapter 4716
D. Chapter 1305
Correct Answer: B
Rationale: Minnesota Rules Chapter 1346 contains the Minnesota Fuel
Gas Code. Chapter 4714 is the Minnesota Plumbing Code, so A
addresses plumbing rather than fuel gas.
,3. The Minnesota Fuel Gas Code incorporates which edition of the
International Fuel Gas Code as its principal model code?
A. 2015 IFGC
B. 2016 IFGC
C. 2018 IFGC
D. 2021 IFGC
Correct Answer: C
Rationale: Minnesota Rules Chapter 1346 incorporates Chapters 2
through 8 of the 2018 International Fuel Gas Code with Minnesota
amendments.
4. The 2020 Minnesota Plumbing Code primarily incorporates which
model plumbing code?
A. 2015 UPC
B. 2018 UPC
C. 2018 IPC
D. 2021 UPC
Correct Answer: B
Rationale: The 2020 Minnesota Plumbing Code incorporates the 2018
Uniform Plumbing Code with Minnesota amendments.
5. What is the principal purpose of a plumbing code?
A. Establish retail prices for plumbing materials
B. Regulate safe design and installation of plumbing systems
C. Establish employee wage classifications
D. Replace manufacturer installation instructions
,Correct Answer: B
Rationale: Plumbing codes establish minimum requirements for safe
plumbing design, materials, installation, and related systems.
6. Which state agency has statutory authority for plumbing licensing in
Minnesota?
A. The Minneapolis Building Inspections office
B. The MN Department of Labor and Industry (DLI)
C. The MN Department of Health
D. The MN Pollution Control Agency
Correct Answer: B
Rationale: DLI's Construction Codes and Licensing Division, under Minn.
Stat. ch. 326B, licenses plumbers statewide.
7. Under Minnesota law, who may serve as the licensed "responsible
master" authorized to obtain a plumbing permit for new construction?
A. Any registered apprentice
B. A licensed Master Plumber or Restricted Master Plumber
C. A journeyworker acting alone
D. A general contractor with no plumbing license
Correct Answer: B
Rationale: Permits for plumbing work are pulled under the license of a
Master Plumber (or Restricted Master Plumber acting within the scope
of that license), who assumes responsibility for the work.
, 8. What is the minimum age to hold an individual plumbing license or
registration in Minnesota?
A. 16
B. 18
C. 21
D. No minimum age applies
Correct Answer: B
Rationale: Applicants for any DLI plumbing registration or license must
be at least 18 years old.
9. What is the primary purpose of a plumbing vent system?
A. Increase water pressure
B. Remove solids from wastewater
C. Protect trap seals from siphonage and backpressure
D. Heat water in the system
Correct Answer: C
Rationale: Vent systems maintain atmospheric pressure in drainage
piping to prevent trap seal loss due to siphoning or backpressure
conditions.
10. The minimum slope for a 3-inch horizontal drainage pipe is
typically:
A. 1/16 inch per foot
B. 1/8 inch per foot
C. 1/4 inch per foot
D. 1/2 inch per foot
