TEXAS JOURNEYMAN PLUMBER LICENSE EXAM – 2026
UPDATE | COMMERCIAL PLUMBING CODE COMPLETE EXAM
QUESTIONS AND VERIFIED ANSWERS | 2026–2027 LATEST
UPDATE | GUARANTEED PASS | DETAILED RATIONALES |
FULL STUDY GUIDE | EXAM PREP | PRACTICE TEST |
CERTIFICATION PREPARATION
1) A Journeyman Plumber in Texas may directly supervise which of the following license holders on
a commercial job site?
A) A Tradesman Plumber-Limited on structures other than one- and two-family dwellings
B) A Master Plumber
C) A Responsible Master Plumber
D) An unregistered apprentice
Correct Answer: A) A Tradesman Plumber-Limited on structures other than one- and two-family
dwellings
Rationale: According to TSBPE regulations, a Journeyman Plumber may directly supervise a
Tradesman Plumber-Limited on job sites for structures other than one- and two-family dwellings.
Journeymen may also supervise Plumber’s Apprentices on all job sites. Master Plumbers and
Responsible Master Plumbers are higher-level licensees who are not supervised by a Journeyman.
2) What is the minimum number of required classroom training hours for an applicant to qualify
for the Texas Journeyman Plumber examination, unless exempt?
A) 24 hours
B) 36 hours
C) 48 hours
D) 60 hours
Correct Answer: C) 48 hours
Rationale: Texas Occupations Code Chapter 1301 requires that a Plumber's Apprentice complete at
least 48 hours of classroom training in a board-approved program before taking the Journeyman
Plumber examination. The training must cover health and safety, applicable plumbing codes, and
water conservation. The 24-hour requirement applies to the Tradesman Plumber-Limited
examination, not the Journeyman.
3) Which scenario would require a plumbing permit to be obtained before work begins?
A) Replacing a leaking faucet in a residential bathroom
B) Fixing a defective trap arm under a kitchen sink
C) Installing a new water heater in a commercial building
D) Replacing a defective shower head
,Correct Answer: C) Installing a new water heater in a commercial building
Rationale: A plumbing permit is required for the replacement of a water heater because it is
considered a potential safety hazard requiring inspection. Minor repairs, such as fixing leaks,
replacing defective trap arms, or replacing faucets and shower heads, typically do not require a
permit as they are considered routine maintenance or minor repairs.
4) According to the Texas Administrative Code, what is the minimum experience requirement in
hours for a Plumber's Apprentice to apply for the Journeyman Plumber examination?
A) 4,000 hours
B) 6,000 hours
C) 8,000 hours
D) 10,000 hours
Correct Answer: C) 8,000 hours
Rationale: Texas Administrative Code Chapter 363 requires applicants to have at least 8,000 hours of
experience working in the plumbing trade under the supervision of a Responsible Master Plumber
(RMP) or a Master Plumber licensed in another state. The Tradesman Plumber-Limited license, by
contrast, requires approximately 4,000 hours.
5) A plumbing system alteration is being planned for an existing commercial building. What is the
most important requirement for this alteration according to plumbing code?
A) It must increase the building's property value
B) It must not cause the system to become unsafe or cause a detrimental effect
C) It must be completed within 30 days of permit issuance
D) It must use only new, never-used materials
Correct Answer: B) It must not cause the system to become unsafe or cause a detrimental effect
Rationale: The plumbing code mandates that alterations to an existing plumbing system must not
cause the system to become unsafe or have a detrimental effect on the overall system. This principle
ensures that modifications do not compromise the health, safety, or functionality of the existing
plumbing infrastructure.
6) Which of the following is required to be kept on the job site at all times for inspection by the
code official?
A) The plumber's personal tools
B) The material delivery receipts
C) The approved construction plans
D) The employee break schedule
Correct Answer: C) The approved construction plans
Rationale: Approved plans are required to be kept on the job site and made available for inspection
by the code officer at all times. This ensures that the work being performed can be verified against
the approved design. Specifications and permits must also be available, but the approved plans are
specifically required to remain on-site.
, 7) Who has the final authority to interpret the local plumbing code?
A) The building owner
B) The project architect
C) The licensed code enforcement officer
D) The master plumber on the job
Correct Answer: C) The licensed code enforcement officer
Rationale: Only a licensed code enforcement officer or the Authority Having Jurisdiction (AHJ) is
empowered to officially interpret the plumbing code. While anyone may have an opinion, the final,
binding decision rests with the code officer. Appeals of code decisions are possible, but the officer's
interpretation is the authoritative one.
8) What is the primary purpose of the chapter on definitions in the plumbing code?
A) To list all approved plumbing manufacturers
B) To provide a glossary of slang plumbing terms
C) To establish standard terminology used throughout the code
D) To define the penalties for code violations
Correct Answer: C) To establish standard terminology used throughout the code
Rationale: The chapter on definitions establishes the standard, correct plumbing terminology used
throughout the plumbing code. Understanding these definitions is foundational to correctly
interpreting all other chapters. The code uses only correct plumbing terms, not slang, and these
definitions form the basis for code application.
9) Which part of the drainage system conveys waste from the end of the building drain to a public
sewer or other disposal point?
A) The building drain
B) The building sewer
C) The house trap
D) The branch drain
Correct Answer: B) The building sewer
Rationale: The building sewer is the part of the drainage system that extends from the end of the
building drain and conveys its discharge to a public sewer, private sewer, or other disposal point. The
building drain is the portion inside the building, while the building sewer is the portion outside, often
running to the street main.
10) What is the minimum clearance required from the center of a water closet to any sidewall or
partition?
A) 12 inches
B) 15 inches
C) 18 inches
D) 21 inches
Correct Answer: B) 15 inches
Rationale: Plumbing codes require that a water closet or bidet be set no closer than 15 inches from its
UPDATE | COMMERCIAL PLUMBING CODE COMPLETE EXAM
QUESTIONS AND VERIFIED ANSWERS | 2026–2027 LATEST
UPDATE | GUARANTEED PASS | DETAILED RATIONALES |
FULL STUDY GUIDE | EXAM PREP | PRACTICE TEST |
CERTIFICATION PREPARATION
1) A Journeyman Plumber in Texas may directly supervise which of the following license holders on
a commercial job site?
A) A Tradesman Plumber-Limited on structures other than one- and two-family dwellings
B) A Master Plumber
C) A Responsible Master Plumber
D) An unregistered apprentice
Correct Answer: A) A Tradesman Plumber-Limited on structures other than one- and two-family
dwellings
Rationale: According to TSBPE regulations, a Journeyman Plumber may directly supervise a
Tradesman Plumber-Limited on job sites for structures other than one- and two-family dwellings.
Journeymen may also supervise Plumber’s Apprentices on all job sites. Master Plumbers and
Responsible Master Plumbers are higher-level licensees who are not supervised by a Journeyman.
2) What is the minimum number of required classroom training hours for an applicant to qualify
for the Texas Journeyman Plumber examination, unless exempt?
A) 24 hours
B) 36 hours
C) 48 hours
D) 60 hours
Correct Answer: C) 48 hours
Rationale: Texas Occupations Code Chapter 1301 requires that a Plumber's Apprentice complete at
least 48 hours of classroom training in a board-approved program before taking the Journeyman
Plumber examination. The training must cover health and safety, applicable plumbing codes, and
water conservation. The 24-hour requirement applies to the Tradesman Plumber-Limited
examination, not the Journeyman.
3) Which scenario would require a plumbing permit to be obtained before work begins?
A) Replacing a leaking faucet in a residential bathroom
B) Fixing a defective trap arm under a kitchen sink
C) Installing a new water heater in a commercial building
D) Replacing a defective shower head
,Correct Answer: C) Installing a new water heater in a commercial building
Rationale: A plumbing permit is required for the replacement of a water heater because it is
considered a potential safety hazard requiring inspection. Minor repairs, such as fixing leaks,
replacing defective trap arms, or replacing faucets and shower heads, typically do not require a
permit as they are considered routine maintenance or minor repairs.
4) According to the Texas Administrative Code, what is the minimum experience requirement in
hours for a Plumber's Apprentice to apply for the Journeyman Plumber examination?
A) 4,000 hours
B) 6,000 hours
C) 8,000 hours
D) 10,000 hours
Correct Answer: C) 8,000 hours
Rationale: Texas Administrative Code Chapter 363 requires applicants to have at least 8,000 hours of
experience working in the plumbing trade under the supervision of a Responsible Master Plumber
(RMP) or a Master Plumber licensed in another state. The Tradesman Plumber-Limited license, by
contrast, requires approximately 4,000 hours.
5) A plumbing system alteration is being planned for an existing commercial building. What is the
most important requirement for this alteration according to plumbing code?
A) It must increase the building's property value
B) It must not cause the system to become unsafe or cause a detrimental effect
C) It must be completed within 30 days of permit issuance
D) It must use only new, never-used materials
Correct Answer: B) It must not cause the system to become unsafe or cause a detrimental effect
Rationale: The plumbing code mandates that alterations to an existing plumbing system must not
cause the system to become unsafe or have a detrimental effect on the overall system. This principle
ensures that modifications do not compromise the health, safety, or functionality of the existing
plumbing infrastructure.
6) Which of the following is required to be kept on the job site at all times for inspection by the
code official?
A) The plumber's personal tools
B) The material delivery receipts
C) The approved construction plans
D) The employee break schedule
Correct Answer: C) The approved construction plans
Rationale: Approved plans are required to be kept on the job site and made available for inspection
by the code officer at all times. This ensures that the work being performed can be verified against
the approved design. Specifications and permits must also be available, but the approved plans are
specifically required to remain on-site.
, 7) Who has the final authority to interpret the local plumbing code?
A) The building owner
B) The project architect
C) The licensed code enforcement officer
D) The master plumber on the job
Correct Answer: C) The licensed code enforcement officer
Rationale: Only a licensed code enforcement officer or the Authority Having Jurisdiction (AHJ) is
empowered to officially interpret the plumbing code. While anyone may have an opinion, the final,
binding decision rests with the code officer. Appeals of code decisions are possible, but the officer's
interpretation is the authoritative one.
8) What is the primary purpose of the chapter on definitions in the plumbing code?
A) To list all approved plumbing manufacturers
B) To provide a glossary of slang plumbing terms
C) To establish standard terminology used throughout the code
D) To define the penalties for code violations
Correct Answer: C) To establish standard terminology used throughout the code
Rationale: The chapter on definitions establishes the standard, correct plumbing terminology used
throughout the plumbing code. Understanding these definitions is foundational to correctly
interpreting all other chapters. The code uses only correct plumbing terms, not slang, and these
definitions form the basis for code application.
9) Which part of the drainage system conveys waste from the end of the building drain to a public
sewer or other disposal point?
A) The building drain
B) The building sewer
C) The house trap
D) The branch drain
Correct Answer: B) The building sewer
Rationale: The building sewer is the part of the drainage system that extends from the end of the
building drain and conveys its discharge to a public sewer, private sewer, or other disposal point. The
building drain is the portion inside the building, while the building sewer is the portion outside, often
running to the street main.
10) What is the minimum clearance required from the center of a water closet to any sidewall or
partition?
A) 12 inches
B) 15 inches
C) 18 inches
D) 21 inches
Correct Answer: B) 15 inches
Rationale: Plumbing codes require that a water closet or bidet be set no closer than 15 inches from its
