ICC B1 Residential Building Inspector
Practice Exam — 100 Questions And
Correct Answers (Verified Answers) Plus
Rationale 2026 Q&A| Instant Download
Pdf
1. What is the primary purpose of a building code?
A. To increase construction costs
B. To protect public health, safety, and welfare
C. To restrict architectural design
D. To limit material choices
Rationale: The building code establishes minimum standards for
safety and welfare.
2. When inspecting a concrete foundation, what is a common defect to
identify?
A. Improper insulation
, B. Poor paint finish
C. Cracks wider than 1/4 inch
D. Missing shingles
Rationale: Significant cracks can indicate structural issues.
3. Minimum ceiling height required in habitable rooms is:
A. 6 feet
B. 7 feet
C. 7 feet 6 inches
D. 8 feet
Rationale: Residential code sets 7'6" minimum for habitable spaces.
4. The required fire separation between an attached garage and living
space is:
A. No separation required
B. 1 layer of drywall
C. 5/8-inch Type X gypsum board
D. Wood paneling
Rationale: Code requires fire-resistant separation to slow fire spread.
5. A deck guardrail is required when the drop is greater than:
A. 12 inches
, B. 18 inches
C. 30 inches
D. 36 inches
Rationale: Guardrails prevent falls from elevated surfaces.
6. What type of foundation is most common in areas with frost depth
concerns?
A. Slab-on-grade
B. Frost-protected shallow foundation
C. Floating slab
D. Post and pier
Rationale: Frost protection prevents heaving in cold climates.
7. Egress windows in bedrooms must have a minimum net clear opening
of:
A. 3.0 square feet
B. 5.7 square feet
C. 8.0 square feet
D. 10.0 square feet
Rationale: Code specifies 5.7 sq ft for emergency escape.
, 8. What is the minimum stair tread depth measured?
A. 6 inches
B. 9 inches
C. 10 inches
D. 12 inches
Rationale: Treads must be deep enough for safe footing.
9. Carbon monoxide alarms are required in dwellings with:
A. Solar panels
B. Electric heating only
C. Fuel-burning appliances
D. Double-pane windows
Rationale: CO alarms alert occupants to invisible gas hazards.
10. Minimum required roof ventilation helps prevent:
A. Increased insulation R-value
B. Moisture buildup and ice dams
C. Color fading
D. Solar heat gain
Rationale: Ventilation limits moisture and temperature issues in
attics.
Practice Exam — 100 Questions And
Correct Answers (Verified Answers) Plus
Rationale 2026 Q&A| Instant Download
1. What is the primary purpose of a building code?
A. To increase construction costs
B. To protect public health, safety, and welfare
C. To restrict architectural design
D. To limit material choices
Rationale: The building code establishes minimum standards for
safety and welfare.
2. When inspecting a concrete foundation, what is a common defect to
identify?
A. Improper insulation
, B. Poor paint finish
C. Cracks wider than 1/4 inch
D. Missing shingles
Rationale: Significant cracks can indicate structural issues.
3. Minimum ceiling height required in habitable rooms is:
A. 6 feet
B. 7 feet
C. 7 feet 6 inches
D. 8 feet
Rationale: Residential code sets 7'6" minimum for habitable spaces.
4. The required fire separation between an attached garage and living
space is:
A. No separation required
B. 1 layer of drywall
C. 5/8-inch Type X gypsum board
D. Wood paneling
Rationale: Code requires fire-resistant separation to slow fire spread.
5. A deck guardrail is required when the drop is greater than:
A. 12 inches
, B. 18 inches
C. 30 inches
D. 36 inches
Rationale: Guardrails prevent falls from elevated surfaces.
6. What type of foundation is most common in areas with frost depth
concerns?
A. Slab-on-grade
B. Frost-protected shallow foundation
C. Floating slab
D. Post and pier
Rationale: Frost protection prevents heaving in cold climates.
7. Egress windows in bedrooms must have a minimum net clear opening
of:
A. 3.0 square feet
B. 5.7 square feet
C. 8.0 square feet
D. 10.0 square feet
Rationale: Code specifies 5.7 sq ft for emergency escape.
, 8. What is the minimum stair tread depth measured?
A. 6 inches
B. 9 inches
C. 10 inches
D. 12 inches
Rationale: Treads must be deep enough for safe footing.
9. Carbon monoxide alarms are required in dwellings with:
A. Solar panels
B. Electric heating only
C. Fuel-burning appliances
D. Double-pane windows
Rationale: CO alarms alert occupants to invisible gas hazards.
10. Minimum required roof ventilation helps prevent:
A. Increased insulation R-value
B. Moisture buildup and ice dams
C. Color fading
D. Solar heat gain
Rationale: Ventilation limits moisture and temperature issues in
attics.
