CO Journeyman Plumber Exam
Questions and Correct Answers
(Verified Answers) Plus Rationale 2027
Q&A| Instant Download Pdf
1. Under Colorado plumbing licensing terminology, what is the
current term for the license formerly known as the “Journeyman
Plumber” license?
A. Residential Plumber
B. Master Plumber
C. Journeyworker Plumber
D. Plumbing Contractor
Rationale: Colorado changed the terminology for this license effective
February 1, 2025. The examination and license formerly called
“Journeyman Plumber” are now referred to as “Journeyworker
Plumber.” The change does not eliminate the underlying trade
requirements or examination.
, 2. What is the primary purpose of the Colorado Plumbing Code?
A. To establish recommended plumbing practices only
B. To regulate plumbing material manufacturers
C. To establish minimum standards for plumbing installation,
alteration, repair, and inspection
D. To establish maximum plumbing-system pressures
Rationale: The Colorado Plumbing Code establishes minimum
standards governing the inspection, installation, alteration, and repair
of plumbing fixtures, appliances, and systems. These minimum
standards provide the baseline requirements for safe plumbing work.
3. Which model code forms the primary basis of the Colorado
Plumbing Code?
A. Uniform Plumbing Code
B. National Plumbing Code
C. International Plumbing Code
D. International Mechanical Code
Rationale: Colorado adopts specified provisions of the International
Plumbing Code (IPC), together with state additions, revisions, and
deletions. Therefore, knowledge of the IPC is central to preparing for
Colorado plumbing examinations.
, 4. Which organization publishes the International Plumbing Code?
A. NFPA
B. IAPMO
C. ASME
D. International Code Council (ICC)
Rationale: The International Plumbing Code is published by the
International Code Council. Colorado incorporates specified IPC
provisions into its state plumbing requirements.
5. A plumbing system is being designed for a new commercial
building. Which factor is most important when determining
whether a proposed installation complies with the code?
A. Whether the installation is the least expensive option
B. Whether the installation matches the plumber's preferred method
C. Whether the installation satisfies applicable code requirements
D. Whether the installation can be completed without an inspection
Rationale: Plumbing codes establish minimum enforceable
requirements for safe and sanitary installations. Cost, convenience,
and individual preference cannot replace mandatory code
requirements.
6. What is the primary function of a plumbing trap?
, A. Increase water pressure
B. Prevent freezing
C. Provide a water seal against sewer gases
D. Increase drainage velocity
Rationale: A trap retains a quantity of water that forms a seal
between the drainage system and the occupied space. This water seal
helps prevent sewer gases from entering the building through the
fixture drain.
7. Which fixture commonly has an integral trap?
A. Floor drain
B. Shower receptor
C. Water closet
D. Lavatory
Rationale: A water closet is manufactured with an integral trap as
part of its fixture design. This distinguishes it from fixtures such as
lavatories and sinks, which normally use a separate trap.
8. What is the purpose of a venting system in a drainage system?
A. To increase water temperature
B. To supply potable water
Questions and Correct Answers
(Verified Answers) Plus Rationale 2027
Q&A| Instant Download Pdf
1. Under Colorado plumbing licensing terminology, what is the
current term for the license formerly known as the “Journeyman
Plumber” license?
A. Residential Plumber
B. Master Plumber
C. Journeyworker Plumber
D. Plumbing Contractor
Rationale: Colorado changed the terminology for this license effective
February 1, 2025. The examination and license formerly called
“Journeyman Plumber” are now referred to as “Journeyworker
Plumber.” The change does not eliminate the underlying trade
requirements or examination.
, 2. What is the primary purpose of the Colorado Plumbing Code?
A. To establish recommended plumbing practices only
B. To regulate plumbing material manufacturers
C. To establish minimum standards for plumbing installation,
alteration, repair, and inspection
D. To establish maximum plumbing-system pressures
Rationale: The Colorado Plumbing Code establishes minimum
standards governing the inspection, installation, alteration, and repair
of plumbing fixtures, appliances, and systems. These minimum
standards provide the baseline requirements for safe plumbing work.
3. Which model code forms the primary basis of the Colorado
Plumbing Code?
A. Uniform Plumbing Code
B. National Plumbing Code
C. International Plumbing Code
D. International Mechanical Code
Rationale: Colorado adopts specified provisions of the International
Plumbing Code (IPC), together with state additions, revisions, and
deletions. Therefore, knowledge of the IPC is central to preparing for
Colorado plumbing examinations.
, 4. Which organization publishes the International Plumbing Code?
A. NFPA
B. IAPMO
C. ASME
D. International Code Council (ICC)
Rationale: The International Plumbing Code is published by the
International Code Council. Colorado incorporates specified IPC
provisions into its state plumbing requirements.
5. A plumbing system is being designed for a new commercial
building. Which factor is most important when determining
whether a proposed installation complies with the code?
A. Whether the installation is the least expensive option
B. Whether the installation matches the plumber's preferred method
C. Whether the installation satisfies applicable code requirements
D. Whether the installation can be completed without an inspection
Rationale: Plumbing codes establish minimum enforceable
requirements for safe and sanitary installations. Cost, convenience,
and individual preference cannot replace mandatory code
requirements.
6. What is the primary function of a plumbing trap?
, A. Increase water pressure
B. Prevent freezing
C. Provide a water seal against sewer gases
D. Increase drainage velocity
Rationale: A trap retains a quantity of water that forms a seal
between the drainage system and the occupied space. This water seal
helps prevent sewer gases from entering the building through the
fixture drain.
7. Which fixture commonly has an integral trap?
A. Floor drain
B. Shower receptor
C. Water closet
D. Lavatory
Rationale: A water closet is manufactured with an integral trap as
part of its fixture design. This distinguishes it from fixtures such as
lavatories and sinks, which normally use a separate trap.
8. What is the purpose of a venting system in a drainage system?
A. To increase water temperature
B. To supply potable water
