IDAHO PLUMBING SPECIALTY JOURNEYMAN
EXAMINATION COMPLETE QUESTIONS AND DETAILED
SOLUTIONS LATEST UPDATE THIS YEAR JUST RELEASED
1. Which situation generally requires a plumbing permit before
regulated plumbing work begins on a building project in Idaho?
A. Replacing a faucet aerator
B. Installing or altering regulated plumbing systems
C. Cleaning a kitchen sink trap
D. Replacing a toilet seat
Answer: B
Rationale: A plumbing permit provides regulatory oversight for new
installations, alterations, and other work governed by Idaho plumbing
requirements.
2. Why is obtaining the required plumbing permit important before
beginning regulated plumbing installation or alteration work?
A. It eliminates inspection requirements
B. It establishes regulatory authorization and permits required
inspections
C. It guarantees the installation will pass
D. It replaces the contractor's license
Answer: B
,Rationale: Permitting establishes authorization for regulated work and
allows the jurisdiction to verify compliance through required
inspections.
3. During an inspection, an inspector discovers concealed piping that
cannot be adequately evaluated without additional access. What
should occur?
A. The inspector must approve it automatically
B. The piping may need to be exposed for inspection
C. The contractor should remove the entire system
D. The owner may waive inspection
Answer: B
Rationale: Concealed work must remain accessible when necessary so
inspectors can verify installation, materials, connections, and code
compliance.
4. Which reference combination is specifically identified for the Idaho
Plumbing Journeyman examination according to the current
candidate bulletin?
A. 2018 IRC and 2021 IPC
B. 2015 UPC and 2017 Idaho State Plumbing Code
C. 2021 UPC and 2024 ISPC
D. NFPA 70 and NEC only
Answer: B
,Rationale: Idaho's current examination bulletin identifies the 2015
Uniform Plumbing Code and 2017 Idaho State Plumbing Code as
permitted references. (dopl.idaho.gov)
5. What is the principal purpose of plumbing-code administration and
inspection requirements on regulated construction projects?
A. Increase material costs
B. Establish minimum safety and sanitation requirements
C. Prevent all plumbing modifications
D. Eliminate engineering responsibilities
Answer: B
Rationale: Plumbing regulations establish minimum requirements
intended to protect public health, safety, sanitation, and property.
Chapter 2 — Definitions
6. In plumbing terminology, what is the primary distinction between a
fixture drain and a fixture supply pipe?
A. One carries wastewater while the other delivers water
B. Both carry potable water
C. Both carry sewage away from buildings
D. One carries gas while the other carries water
Answer: A
Rationale: A fixture supply delivers water to a plumbing fixture, while
the fixture drain carries discharged wastewater away.
, 7. What is the primary function of a trap installed beneath a plumbing
fixture?
A. Increase water pressure
B. Prevent sewer gases from entering occupied spaces
C. Increase drainage velocity
D. Remove suspended solids
Answer: B
Rationale: The trap maintains a water seal that separates the drainage
system from potentially harmful or objectionable sewer gases.
8. Which term describes the piping that carries wastewater from
plumbing fixtures toward the building sewer?
A. Water distribution pipe
B. Drainage piping
C. Supply riser
D. Gas vent
Answer: B
Rationale: Drainage piping conveys wastewater and sewage from
fixtures through the building drainage system toward the sewer
connection.
9. What is the principal purpose of a venting system within a
plumbing drainage installation?
EXAMINATION COMPLETE QUESTIONS AND DETAILED
SOLUTIONS LATEST UPDATE THIS YEAR JUST RELEASED
1. Which situation generally requires a plumbing permit before
regulated plumbing work begins on a building project in Idaho?
A. Replacing a faucet aerator
B. Installing or altering regulated plumbing systems
C. Cleaning a kitchen sink trap
D. Replacing a toilet seat
Answer: B
Rationale: A plumbing permit provides regulatory oversight for new
installations, alterations, and other work governed by Idaho plumbing
requirements.
2. Why is obtaining the required plumbing permit important before
beginning regulated plumbing installation or alteration work?
A. It eliminates inspection requirements
B. It establishes regulatory authorization and permits required
inspections
C. It guarantees the installation will pass
D. It replaces the contractor's license
Answer: B
,Rationale: Permitting establishes authorization for regulated work and
allows the jurisdiction to verify compliance through required
inspections.
3. During an inspection, an inspector discovers concealed piping that
cannot be adequately evaluated without additional access. What
should occur?
A. The inspector must approve it automatically
B. The piping may need to be exposed for inspection
C. The contractor should remove the entire system
D. The owner may waive inspection
Answer: B
Rationale: Concealed work must remain accessible when necessary so
inspectors can verify installation, materials, connections, and code
compliance.
4. Which reference combination is specifically identified for the Idaho
Plumbing Journeyman examination according to the current
candidate bulletin?
A. 2018 IRC and 2021 IPC
B. 2015 UPC and 2017 Idaho State Plumbing Code
C. 2021 UPC and 2024 ISPC
D. NFPA 70 and NEC only
Answer: B
,Rationale: Idaho's current examination bulletin identifies the 2015
Uniform Plumbing Code and 2017 Idaho State Plumbing Code as
permitted references. (dopl.idaho.gov)
5. What is the principal purpose of plumbing-code administration and
inspection requirements on regulated construction projects?
A. Increase material costs
B. Establish minimum safety and sanitation requirements
C. Prevent all plumbing modifications
D. Eliminate engineering responsibilities
Answer: B
Rationale: Plumbing regulations establish minimum requirements
intended to protect public health, safety, sanitation, and property.
Chapter 2 — Definitions
6. In plumbing terminology, what is the primary distinction between a
fixture drain and a fixture supply pipe?
A. One carries wastewater while the other delivers water
B. Both carry potable water
C. Both carry sewage away from buildings
D. One carries gas while the other carries water
Answer: A
Rationale: A fixture supply delivers water to a plumbing fixture, while
the fixture drain carries discharged wastewater away.
, 7. What is the primary function of a trap installed beneath a plumbing
fixture?
A. Increase water pressure
B. Prevent sewer gases from entering occupied spaces
C. Increase drainage velocity
D. Remove suspended solids
Answer: B
Rationale: The trap maintains a water seal that separates the drainage
system from potentially harmful or objectionable sewer gases.
8. Which term describes the piping that carries wastewater from
plumbing fixtures toward the building sewer?
A. Water distribution pipe
B. Drainage piping
C. Supply riser
D. Gas vent
Answer: B
Rationale: Drainage piping conveys wastewater and sewage from
fixtures through the building drainage system toward the sewer
connection.
9. What is the principal purpose of a venting system within a
plumbing drainage installation?
