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MINNESOTA HIGH PRESSURE PIPING BUSINESS LAW
COMPREHENSIVE EXAM –2026/2027 COMPLETE (140)
CURRENT TESTING QUESTIONS AND CORRECT
ANSWERS WITH DETAILED RATIONALES.
PIPING
Prepare for the Minnesota High Pressure Piping Business Law Exam with this focused
practice resource designed to support your contractor licensing preparation. It
features exam-style practice questions covering Minnesota Statutes Chapter 326B
and DLI High Pressure Piping regulations, qualifying master pipefitter requirements,
contractor licensing and $15,000 surety bond rules, general liability insurance,
Minnesota construction contract law, mechanic's liens, workers' compensation, and
jobsite safety compliance. An ideal study aid for master pipefitters, business owners,
and qualifying individuals looking to meet Minnesota Department of Labor and
Industry (DLI) requirements and establish a licensed high pressure piping contracting
business.
MULTIPLE CHOICE.
SECTION 1: DEFINITION OF HIGH PRESSURE PIPING AND LICENSE
CLASSIFICATIONS (Questions 1-25)
1. Under Minnesota Statutes, which pressure defines a steam system as
“high-pressure piping”?
A) Steam > 5 psi
B) Steam > 10 psi
C) Steam > 15 psi
D) Steam > 30 psi
Answer: C
Rationale: Minnesota law defines high-pressure steam piping as systems
operating at pressures greater than 15 psi.
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2. Which of the following correctly defines “High Pressure Piping” under
Minnesota statutes?
A) Steam > 10 psi; heating media > 20 psi and > 200°F
B) Steam > 15 psi; heating media > 30 psi and > 250°F
C) Steam > 20 psi; heating media > 40 psi and > 300°F
D) Steam > 25 psi; heating media > 50 psi and > 350°F
Answer: B
Rationale: Minnesota law defines high-pressure piping as steam
exceeding 15 psi or any heating medium above 30 psi and a temperature
greater than 250°F.
3. Which of the following pipefitter classifications is authorized to
contract on high-pressure piping projects?
A) Apprentice
B) Journeyman
C) Master
D) Unlicensed contractor
Answer: C
Rationale: Only a master-level license authorizes a contractor to bid,
supervise, and sign off on high-pressure piping work in Minnesota.
4. What is the minimum age requirement to become a licensed
journeyworker high pressure pipefitter?
A) 18 years old
B) 19 years old
C) 20 years old
D) 21 years old
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Answer: C
Rationale: Journeyworker high pressure pipefitter applicants must be at
least 20 years of age.
5. What is the minimum age requirement to become a licensed master
high pressure pipefitter?
A) 18 years old
B) 19 years old
C) 20 years old
D) 21 years old
Answer: D
Rationale: Master high pressure pipefitter applicants must be at least 21
years of age.
6. How many years of experience are required to qualify for the master
high pressure pipefitter license examination?
A) 2 years
B) 3 years
C) 4 years
D) 5 years
Answer: D
Rationale: An individual must have five years of experience in the
practical installation or fabrication of high pressure piping systems to
qualify for the master pipefitter exam.
7. How many years of experience are required to qualify for the
journeyworker high pressure pipefitter license examination?
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A) 2 years
B) 3 years
C) 4 years
D) 5 years
Answer: C
Rationale: An individual must have at least four years of experience as a
registered unlicensed individual or pipefitter apprentice, or have worked
in the trade of high pressure pipefitting outside of Minnesota.
8. What is the minimum age required to perform high pressure piping work
in Minnesota?
A) 16 years old
B) 17 years old
C) 18 years old
D) 21 years old
Answer: C
Rationale: You can perform high pressure piping work if you are at least 18
years old.
9. Which of the following is NOT considered a high pressure piping system
under Minnesota law?
A) Steam-system piping designed to operate at more than 15 psi
B) High-temperature fluids designed to operate at more than 250°F and 30 psi
C) Ammonia (717) refrigeration-system piping
D) Residential water supply piping at 60 psi
Answer: D
Rationale: High pressure piping systems include steam > 15 psi, high-
MINNESOTA HIGH PRESSURE PIPING BUSINESS LAW
COMPREHENSIVE EXAM –2026/2027 COMPLETE (140)
CURRENT TESTING QUESTIONS AND CORRECT
ANSWERS WITH DETAILED RATIONALES.
PIPING
Prepare for the Minnesota High Pressure Piping Business Law Exam with this focused
practice resource designed to support your contractor licensing preparation. It
features exam-style practice questions covering Minnesota Statutes Chapter 326B
and DLI High Pressure Piping regulations, qualifying master pipefitter requirements,
contractor licensing and $15,000 surety bond rules, general liability insurance,
Minnesota construction contract law, mechanic's liens, workers' compensation, and
jobsite safety compliance. An ideal study aid for master pipefitters, business owners,
and qualifying individuals looking to meet Minnesota Department of Labor and
Industry (DLI) requirements and establish a licensed high pressure piping contracting
business.
MULTIPLE CHOICE.
SECTION 1: DEFINITION OF HIGH PRESSURE PIPING AND LICENSE
CLASSIFICATIONS (Questions 1-25)
1. Under Minnesota Statutes, which pressure defines a steam system as
“high-pressure piping”?
A) Steam > 5 psi
B) Steam > 10 psi
C) Steam > 15 psi
D) Steam > 30 psi
Answer: C
Rationale: Minnesota law defines high-pressure steam piping as systems
operating at pressures greater than 15 psi.
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2. Which of the following correctly defines “High Pressure Piping” under
Minnesota statutes?
A) Steam > 10 psi; heating media > 20 psi and > 200°F
B) Steam > 15 psi; heating media > 30 psi and > 250°F
C) Steam > 20 psi; heating media > 40 psi and > 300°F
D) Steam > 25 psi; heating media > 50 psi and > 350°F
Answer: B
Rationale: Minnesota law defines high-pressure piping as steam
exceeding 15 psi or any heating medium above 30 psi and a temperature
greater than 250°F.
3. Which of the following pipefitter classifications is authorized to
contract on high-pressure piping projects?
A) Apprentice
B) Journeyman
C) Master
D) Unlicensed contractor
Answer: C
Rationale: Only a master-level license authorizes a contractor to bid,
supervise, and sign off on high-pressure piping work in Minnesota.
4. What is the minimum age requirement to become a licensed
journeyworker high pressure pipefitter?
A) 18 years old
B) 19 years old
C) 20 years old
D) 21 years old
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Answer: C
Rationale: Journeyworker high pressure pipefitter applicants must be at
least 20 years of age.
5. What is the minimum age requirement to become a licensed master
high pressure pipefitter?
A) 18 years old
B) 19 years old
C) 20 years old
D) 21 years old
Answer: D
Rationale: Master high pressure pipefitter applicants must be at least 21
years of age.
6. How many years of experience are required to qualify for the master
high pressure pipefitter license examination?
A) 2 years
B) 3 years
C) 4 years
D) 5 years
Answer: D
Rationale: An individual must have five years of experience in the
practical installation or fabrication of high pressure piping systems to
qualify for the master pipefitter exam.
7. How many years of experience are required to qualify for the
journeyworker high pressure pipefitter license examination?
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A) 2 years
B) 3 years
C) 4 years
D) 5 years
Answer: C
Rationale: An individual must have at least four years of experience as a
registered unlicensed individual or pipefitter apprentice, or have worked
in the trade of high pressure pipefitting outside of Minnesota.
8. What is the minimum age required to perform high pressure piping work
in Minnesota?
A) 16 years old
B) 17 years old
C) 18 years old
D) 21 years old
Answer: C
Rationale: You can perform high pressure piping work if you are at least 18
years old.
9. Which of the following is NOT considered a high pressure piping system
under Minnesota law?
A) Steam-system piping designed to operate at more than 15 psi
B) High-temperature fluids designed to operate at more than 250°F and 30 psi
C) Ammonia (717) refrigeration-system piping
D) Residential water supply piping at 60 psi
Answer: D
Rationale: High pressure piping systems include steam > 15 psi, high-
