ICC Residential Plans Examiner (R3) Practice
Exam Questions And Correct Answers (Verified
Answers) Plus Rationales
1. When reviewing a residential plan, which of the following is the
primary purpose of a site plan?
A. To indicate the interior finishes of the building
B. To show the location of the building on the lot and setbacks
C. To provide electrical wiring diagrams
D. To detail plumbing fixture schedules
B. To show the location of the building on the lot and setbacks
Rationale: The site plan is intended to show the placement of the
building relative to property lines, easements, and required setbacks. It
does not typically include interior details such as finishes, electrical
layouts, or plumbing fixture schedules.
2. According to the IRC, what is the minimum ceiling height required
in habitable spaces?
A. 6 feet 8 inches
B. 7 feet
C. 7 feet 6 inches
, D. 8 feet
B. 7 feet
Rationale: The International Residential Code (IRC) requires a minimum
ceiling height of 7 feet in habitable rooms, hallways, bathrooms, and
laundry areas. Certain exceptions exist for beams or sloped ceilings, but
the standard minimum is 7 feet.
3. Which of the following would indicate non-compliance in the
foundation plan?
A. Footing width dimension less than code minimum
B. Reinforcement bar placement as per code
C. Slab thickness consistent with code
D. Footings shown continuous under load-bearing walls
A. Footing width dimension less than code minimum
Rationale: Foundation plans must meet code requirements for
dimensions and reinforcement. A footing narrower than the code
minimum would not support the intended loads, indicating non-
compliance.
4. When examining a floor framing plan, the reviewer should
confirm:
A. The type and spacing of joists
B. Interior wall finishes
, C. Door hardware specifications
D. Kitchen appliance layouts
A. The type and spacing of joists
Rationale: Floor framing plans are reviewed to ensure structural
integrity, including correct joist sizing, type, and spacing. Interior
finishes and appliances are not part of structural review.
5. In stairway design for a residential dwelling, what is the maximum
riser height allowed by IRC?
A. 7 inches
B. 7 3/4 inches
C. 8 inches
D. 8 1/4 inches
B. 7 3/4 inches
Rationale: IRC Section R311.7.5.1 limits the maximum riser height in
residential stairs to 7 3/4 inches to ensure safe and uniform stairways.
, 6. Which document provides the primary information for verifying
compliance with energy efficiency requirements?
A. Structural plan
B. Architectural plan
C. Energy compliance documentation
D. Mechanical plan
C. Energy compliance documentation
Rationale: Energy compliance forms, such as REScheck reports, provide
documentation that a building meets the energy efficiency requirements
of the IRC and applicable energy codes.
7. What is the minimum clear width for a hallway in a single-family
dwelling?
A. 30 inches
B. 36 inches
C. 42 inches
D. 48 inches
B. 36 inches
Rationale: IRC Section R311.6 requires hallways to have a minimum
clear width of 36 inches to allow safe passage and accessibility.
Exam Questions And Correct Answers (Verified
Answers) Plus Rationales
1. When reviewing a residential plan, which of the following is the
primary purpose of a site plan?
A. To indicate the interior finishes of the building
B. To show the location of the building on the lot and setbacks
C. To provide electrical wiring diagrams
D. To detail plumbing fixture schedules
B. To show the location of the building on the lot and setbacks
Rationale: The site plan is intended to show the placement of the
building relative to property lines, easements, and required setbacks. It
does not typically include interior details such as finishes, electrical
layouts, or plumbing fixture schedules.
2. According to the IRC, what is the minimum ceiling height required
in habitable spaces?
A. 6 feet 8 inches
B. 7 feet
C. 7 feet 6 inches
, D. 8 feet
B. 7 feet
Rationale: The International Residential Code (IRC) requires a minimum
ceiling height of 7 feet in habitable rooms, hallways, bathrooms, and
laundry areas. Certain exceptions exist for beams or sloped ceilings, but
the standard minimum is 7 feet.
3. Which of the following would indicate non-compliance in the
foundation plan?
A. Footing width dimension less than code minimum
B. Reinforcement bar placement as per code
C. Slab thickness consistent with code
D. Footings shown continuous under load-bearing walls
A. Footing width dimension less than code minimum
Rationale: Foundation plans must meet code requirements for
dimensions and reinforcement. A footing narrower than the code
minimum would not support the intended loads, indicating non-
compliance.
4. When examining a floor framing plan, the reviewer should
confirm:
A. The type and spacing of joists
B. Interior wall finishes
, C. Door hardware specifications
D. Kitchen appliance layouts
A. The type and spacing of joists
Rationale: Floor framing plans are reviewed to ensure structural
integrity, including correct joist sizing, type, and spacing. Interior
finishes and appliances are not part of structural review.
5. In stairway design for a residential dwelling, what is the maximum
riser height allowed by IRC?
A. 7 inches
B. 7 3/4 inches
C. 8 inches
D. 8 1/4 inches
B. 7 3/4 inches
Rationale: IRC Section R311.7.5.1 limits the maximum riser height in
residential stairs to 7 3/4 inches to ensure safe and uniform stairways.
, 6. Which document provides the primary information for verifying
compliance with energy efficiency requirements?
A. Structural plan
B. Architectural plan
C. Energy compliance documentation
D. Mechanical plan
C. Energy compliance documentation
Rationale: Energy compliance forms, such as REScheck reports, provide
documentation that a building meets the energy efficiency requirements
of the IRC and applicable energy codes.
7. What is the minimum clear width for a hallway in a single-family
dwelling?
A. 30 inches
B. 36 inches
C. 42 inches
D. 48 inches
B. 36 inches
Rationale: IRC Section R311.6 requires hallways to have a minimum
clear width of 36 inches to allow safe passage and accessibility.
