ICC Residential Building Inspector
Certification Exam Practice Test
Questions And Correct Answers (Verified
Answers) Plus Rationales 2026 Q&A
Instant Download Pdf
1. What code is primarily used for one- and two-family dwellings?
A. IBC
B. IRC
C. NEC
D. IMC
Answer: B
Rationale: The International Residential Code (IRC) governs one- and two-
family dwellings and townhouses.
2. Footings are primarily designed to:
A. Increase roof load capacity
B. Transfer building loads to soil
C. Resist wind uplift
D. Support interior finishes
Answer: B
Rationale: Footings distribute structural loads to the soil to prevent
settlement.
,3. The minimum headroom in a residential stairway is typically:
A. 6 ft 6 in
B. 6 ft 8 in
C. 7 ft 0 in
D. 7 ft 6 in
Answer: B
Rationale: IRC requires a minimum headroom of 6 feet 8 inches.
4. Which component resists lateral earth pressure in a basement wall?
A. Joists
B. Footings
C. Foundation wall
D. Roof truss
Answer: C
Rationale: Foundation walls resist lateral soil pressure.
5. The minimum width of a residential egress door is:
A. 28 inches
B. 30 inches
C. 32 inches
D. 36 inches
Answer: C
Rationale: The IRC requires a minimum 32-inch clear width.
6. Engineered lumber includes:
A. Brick veneer
B. LVL
C. Concrete block
D. Clay tile
Answer: B
Rationale: Laminated Veneer Lumber (LVL) is engineered wood.
7. The primary purpose of flashing is to:
A. Improve insulation
B. Prevent water intrusion
, C. Increase fire resistance
D. Support roofing
Answer: B
Rationale: Flashing directs water away from joints and penetrations.
8. A sill plate is typically anchored to:
A. Roof truss
B. Foundation wall
C. Drywall
D. Ceiling joist
Answer: B
Rationale: The sill plate connects framing to the foundation.
9. The maximum riser height in residential stairs is typically:
A. 7 ¾ inches
B. 8 ¼ inches
C. 9 inches
D. 10 inches
Answer: A
Rationale: IRC limits risers to 7 ¾ inches maximum.
10.A load-bearing wall supports:
A. Only its own weight
B. Roof or floor loads above
C. Plumbing systems
D. Electrical systems
Answer: B
Rationale: Load-bearing walls carry structural loads from above.
11.The standard spacing for wall studs in residential construction is:
A. 12 inches
B. 16 inches
C. 18 inches
D. 24 inches
Certification Exam Practice Test
Questions And Correct Answers (Verified
Answers) Plus Rationales 2026 Q&A
Instant Download Pdf
1. What code is primarily used for one- and two-family dwellings?
A. IBC
B. IRC
C. NEC
D. IMC
Answer: B
Rationale: The International Residential Code (IRC) governs one- and two-
family dwellings and townhouses.
2. Footings are primarily designed to:
A. Increase roof load capacity
B. Transfer building loads to soil
C. Resist wind uplift
D. Support interior finishes
Answer: B
Rationale: Footings distribute structural loads to the soil to prevent
settlement.
,3. The minimum headroom in a residential stairway is typically:
A. 6 ft 6 in
B. 6 ft 8 in
C. 7 ft 0 in
D. 7 ft 6 in
Answer: B
Rationale: IRC requires a minimum headroom of 6 feet 8 inches.
4. Which component resists lateral earth pressure in a basement wall?
A. Joists
B. Footings
C. Foundation wall
D. Roof truss
Answer: C
Rationale: Foundation walls resist lateral soil pressure.
5. The minimum width of a residential egress door is:
A. 28 inches
B. 30 inches
C. 32 inches
D. 36 inches
Answer: C
Rationale: The IRC requires a minimum 32-inch clear width.
6. Engineered lumber includes:
A. Brick veneer
B. LVL
C. Concrete block
D. Clay tile
Answer: B
Rationale: Laminated Veneer Lumber (LVL) is engineered wood.
7. The primary purpose of flashing is to:
A. Improve insulation
B. Prevent water intrusion
, C. Increase fire resistance
D. Support roofing
Answer: B
Rationale: Flashing directs water away from joints and penetrations.
8. A sill plate is typically anchored to:
A. Roof truss
B. Foundation wall
C. Drywall
D. Ceiling joist
Answer: B
Rationale: The sill plate connects framing to the foundation.
9. The maximum riser height in residential stairs is typically:
A. 7 ¾ inches
B. 8 ¼ inches
C. 9 inches
D. 10 inches
Answer: A
Rationale: IRC limits risers to 7 ¾ inches maximum.
10.A load-bearing wall supports:
A. Only its own weight
B. Roof or floor loads above
C. Plumbing systems
D. Electrical systems
Answer: B
Rationale: Load-bearing walls carry structural loads from above.
11.The standard spacing for wall studs in residential construction is:
A. 12 inches
B. 16 inches
C. 18 inches
D. 24 inches
