Colorado Plumbing Plans Examiner
Examination Practice Exam 2026 | 100
Questions & Answers with Detailed
Rationales | Complete Study Guide &
Exam Prep
1. What is the primary purpose of a plumbing plan review?
A. To determine the contractor's profit
B. To verify that proposed plumbing work complies with applicable codes and
regulations
C. To select the plumbing contractor
D. To establish material prices
Answer: To verify that proposed plumbing work complies with applicable codes
and regulations
Rationale: Plan review is intended to identify code deficiencies before
construction and verify that the proposed plumbing system meets the adopted
requirements.
2. Which documents should a plans examiner primarily use when reviewing a
plumbing permit application?
,A. Contractor's estimate only
B. Applicable adopted codes, approved standards, plans, specifications, and
governing regulations
C. Manufacturer advertisements only
D. Previous inspection reports from unrelated projects
Answer: Applicable adopted codes, approved standards, plans, specifications,
and governing regulations
Rationale: A plans examiner evaluates the complete construction proposal
against the codes and standards adopted by the jurisdiction.
3. Which code is identified by Colorado as one of the adopted codes used for
plumbing installations?
A. International Plumbing Code (IPC)
B. National Electrical Code only
C. International Energy Conservation Code only
D. Uniform Mechanical Code only
Answer: International Plumbing Code (IPC)
Rationale: Colorado identifies the IPC, IRC, and IFGC as adopted codes used for
plumbing installations.
4. What should a plans examiner do when submitted drawings conflict with
the written specifications?
A. Ignore the conflict
B. Approve the plans automatically
C. Identify the discrepancy and require clarification or correction
D. Allow the contractor to decide after installation
Answer: Identify the discrepancy and require clarification or correction
Rationale: Conflicting construction documents can result in noncompliant work
and should be resolved before approval.
, 5. Which information is most important on a plumbing floor plan?
A. Furniture color
B. Location and identification of plumbing fixtures, piping, equipment, and
relevant connections
C. Contractor's payroll information
D. Landscaping schedule
Answer: Location and identification of plumbing fixtures, piping, equipment,
and relevant connections
Rationale: A plumbing plan must communicate the proposed plumbing layout
sufficiently for code compliance and construction review.
6. What is the purpose of a plumbing riser diagram?
A. To show property landscaping
B. To graphically show vertical relationships and connections in the plumbing
system
C. To calculate building height
D. To identify electrical circuits
Answer: To graphically show vertical relationships and connections in the
plumbing system
Rationale: Riser diagrams help the examiner understand drainage, vent, and
water distribution relationships that may not be apparent on floor plans.
7. A plans examiner notices that a fixture is shown on the floor plan but not
on the plumbing schedule. What should the examiner do?
A. Ignore it
B. Assume the schedule is correct
C. Request clarification and reconciliation of the documents
D. Delete the fixture from the plans
Answer: Request clarification and reconciliation of the documents
, Rationale: Consistency among plans, schedules, specifications, and calculations
is essential for accurate review.
8. What is a fixture unit primarily used for in plumbing design?
A. Determining fixture color
B. Estimating the probable demand on a plumbing system
C. Determining pipe material
D. Measuring building height
Answer: Estimating the probable demand on a plumbing system
Rationale: Drainage fixture units and water supply fixture units provide
standardized methods for sizing piping based on expected demand.
9. When reviewing a plumbing plan, why is the building occupancy important?
A. It determines paint requirements
B. It can affect fixture requirements, water demand, drainage loading, and
accessibility provisions
C. It determines the contractor's license fee
D. It determines pipe color
Answer: It can affect fixture requirements, water demand, drainage loading, and
accessibility provisions
Rationale: Occupancy type and occupant load can affect several plumbing code
requirements.
10.What should a plans examiner verify when reviewing a water service
connection?
A. That it is connected only to electrical wiring
B. That the proposed service is appropriately sized and connected in accordance
with applicable requirements
C. That it uses the smallest pipe possible
D. That no shutoff valve is provided
Examination Practice Exam 2026 | 100
Questions & Answers with Detailed
Rationales | Complete Study Guide &
Exam Prep
1. What is the primary purpose of a plumbing plan review?
A. To determine the contractor's profit
B. To verify that proposed plumbing work complies with applicable codes and
regulations
C. To select the plumbing contractor
D. To establish material prices
Answer: To verify that proposed plumbing work complies with applicable codes
and regulations
Rationale: Plan review is intended to identify code deficiencies before
construction and verify that the proposed plumbing system meets the adopted
requirements.
2. Which documents should a plans examiner primarily use when reviewing a
plumbing permit application?
,A. Contractor's estimate only
B. Applicable adopted codes, approved standards, plans, specifications, and
governing regulations
C. Manufacturer advertisements only
D. Previous inspection reports from unrelated projects
Answer: Applicable adopted codes, approved standards, plans, specifications,
and governing regulations
Rationale: A plans examiner evaluates the complete construction proposal
against the codes and standards adopted by the jurisdiction.
3. Which code is identified by Colorado as one of the adopted codes used for
plumbing installations?
A. International Plumbing Code (IPC)
B. National Electrical Code only
C. International Energy Conservation Code only
D. Uniform Mechanical Code only
Answer: International Plumbing Code (IPC)
Rationale: Colorado identifies the IPC, IRC, and IFGC as adopted codes used for
plumbing installations.
4. What should a plans examiner do when submitted drawings conflict with
the written specifications?
A. Ignore the conflict
B. Approve the plans automatically
C. Identify the discrepancy and require clarification or correction
D. Allow the contractor to decide after installation
Answer: Identify the discrepancy and require clarification or correction
Rationale: Conflicting construction documents can result in noncompliant work
and should be resolved before approval.
, 5. Which information is most important on a plumbing floor plan?
A. Furniture color
B. Location and identification of plumbing fixtures, piping, equipment, and
relevant connections
C. Contractor's payroll information
D. Landscaping schedule
Answer: Location and identification of plumbing fixtures, piping, equipment,
and relevant connections
Rationale: A plumbing plan must communicate the proposed plumbing layout
sufficiently for code compliance and construction review.
6. What is the purpose of a plumbing riser diagram?
A. To show property landscaping
B. To graphically show vertical relationships and connections in the plumbing
system
C. To calculate building height
D. To identify electrical circuits
Answer: To graphically show vertical relationships and connections in the
plumbing system
Rationale: Riser diagrams help the examiner understand drainage, vent, and
water distribution relationships that may not be apparent on floor plans.
7. A plans examiner notices that a fixture is shown on the floor plan but not
on the plumbing schedule. What should the examiner do?
A. Ignore it
B. Assume the schedule is correct
C. Request clarification and reconciliation of the documents
D. Delete the fixture from the plans
Answer: Request clarification and reconciliation of the documents
, Rationale: Consistency among plans, schedules, specifications, and calculations
is essential for accurate review.
8. What is a fixture unit primarily used for in plumbing design?
A. Determining fixture color
B. Estimating the probable demand on a plumbing system
C. Determining pipe material
D. Measuring building height
Answer: Estimating the probable demand on a plumbing system
Rationale: Drainage fixture units and water supply fixture units provide
standardized methods for sizing piping based on expected demand.
9. When reviewing a plumbing plan, why is the building occupancy important?
A. It determines paint requirements
B. It can affect fixture requirements, water demand, drainage loading, and
accessibility provisions
C. It determines the contractor's license fee
D. It determines pipe color
Answer: It can affect fixture requirements, water demand, drainage loading, and
accessibility provisions
Rationale: Occupancy type and occupant load can affect several plumbing code
requirements.
10.What should a plans examiner verify when reviewing a water service
connection?
A. That it is connected only to electrical wiring
B. That the proposed service is appropriately sized and connected in accordance
with applicable requirements
C. That it uses the smallest pipe possible
D. That no shutoff valve is provided
