COLORADO ICC RESIDENTIAL BUILDING INSPECTOR
EXAM QUESTIONS AND CORRECT ANSWERS
(VERIFIED ANSWERS) Q&A 2026 |INSTANT
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1. Which code is primarily used for one- and two-family
dwellings?
A. IBC
B. IRC
C. IEBC
D. IFC
Rationale: The IRC governs residential one- and two-family
dwellings.
Correct Answer: B. IRC
2. What is the minimum headroom required in habitable
rooms?
A. 6 ft 6 in
B. 7 ft 0 in
C. 7 ft 6 in
D. 8 ft 0 in
,Rationale: IRC requires minimum 7 ft ceiling height in habitable
spaces.
Correct Answer: B. 7 ft 0 in
3. What is the minimum width of a residential stairway?
A. 30 inches
B. 32 inches
C. 36 inches
D. 44 inches
Rationale: IRC requires minimum 36 inches clear width.
Correct Answer: C. 36 inches
4. The maximum riser height in residential stairs is typically:
A. 7 3/4 inches
B. 8 inches
C. 8 1/4 inches
D. 9 inches
Rationale: IRC limits risers to 7 3/4 inches maximum.
Correct Answer: A. 7 3/4 inches
5. Minimum tread depth in residential stairs is:
A. 9 inches
B. 9 1/4 inches
,C. 10 inches
D. 11 inches
Rationale: IRC requires 10-inch minimum tread depth.
Correct Answer: C. 10 inches
6. Guardrails are required when the walking surface is more
than:
A. 24 inches above grade
B. 30 inches above grade
C. 36 inches above grade
D. 42 inches above grade
Rationale: IRC requires guards at 30 inches or more drop.
Correct Answer: B. 30 inches above grade
7. Minimum height of a guardrail is:
A. 30 inches
B. 34 inches
C. 36 inches
D. 42 inches
Rationale: IRC minimum guard height is 36 inches (42 inches at
stairs in some cases).
Correct Answer: C. 36 inches
, 8. Required minimum ceiling height in basements (habitable
spaces) is:
A. 6 ft 6 in
B. 6 ft 8 in
C. 7 ft 0 in
D. 7 ft 6 in
Rationale: IRC requires 7 ft minimum in habitable basements.
Correct Answer: C. 7 ft 0 in
9. The primary purpose of building inspection is to ensure:
A. Aesthetic design
B. Code compliance and safety
C. Material cost reduction
D. Faster construction
Rationale: Inspection ensures safety and compliance with
codes.
Correct Answer: B. Code compliance and safety
10. Which document governs structural wood framing?
A. IFC
B. IRC
C. NEC
D. IMC
EXAM QUESTIONS AND CORRECT ANSWERS
(VERIFIED ANSWERS) Q&A 2026 |INSTANT
DOWNLOAD PDF
1. Which code is primarily used for one- and two-family
dwellings?
A. IBC
B. IRC
C. IEBC
D. IFC
Rationale: The IRC governs residential one- and two-family
dwellings.
Correct Answer: B. IRC
2. What is the minimum headroom required in habitable
rooms?
A. 6 ft 6 in
B. 7 ft 0 in
C. 7 ft 6 in
D. 8 ft 0 in
,Rationale: IRC requires minimum 7 ft ceiling height in habitable
spaces.
Correct Answer: B. 7 ft 0 in
3. What is the minimum width of a residential stairway?
A. 30 inches
B. 32 inches
C. 36 inches
D. 44 inches
Rationale: IRC requires minimum 36 inches clear width.
Correct Answer: C. 36 inches
4. The maximum riser height in residential stairs is typically:
A. 7 3/4 inches
B. 8 inches
C. 8 1/4 inches
D. 9 inches
Rationale: IRC limits risers to 7 3/4 inches maximum.
Correct Answer: A. 7 3/4 inches
5. Minimum tread depth in residential stairs is:
A. 9 inches
B. 9 1/4 inches
,C. 10 inches
D. 11 inches
Rationale: IRC requires 10-inch minimum tread depth.
Correct Answer: C. 10 inches
6. Guardrails are required when the walking surface is more
than:
A. 24 inches above grade
B. 30 inches above grade
C. 36 inches above grade
D. 42 inches above grade
Rationale: IRC requires guards at 30 inches or more drop.
Correct Answer: B. 30 inches above grade
7. Minimum height of a guardrail is:
A. 30 inches
B. 34 inches
C. 36 inches
D. 42 inches
Rationale: IRC minimum guard height is 36 inches (42 inches at
stairs in some cases).
Correct Answer: C. 36 inches
, 8. Required minimum ceiling height in basements (habitable
spaces) is:
A. 6 ft 6 in
B. 6 ft 8 in
C. 7 ft 0 in
D. 7 ft 6 in
Rationale: IRC requires 7 ft minimum in habitable basements.
Correct Answer: C. 7 ft 0 in
9. The primary purpose of building inspection is to ensure:
A. Aesthetic design
B. Code compliance and safety
C. Material cost reduction
D. Faster construction
Rationale: Inspection ensures safety and compliance with
codes.
Correct Answer: B. Code compliance and safety
10. Which document governs structural wood framing?
A. IFC
B. IRC
C. NEC
D. IMC
