TEXAS RESIDENTIAL BUILDING
INSPECTOR CERTIFICATION EXAM ACTUAL
2026 VERIFIED QUESTIONS WITH ANSWERS
COMPREHENSIVE & RATIONALE|INSTANT
DOWNLOAD
1. During the inspection of a newly constructed one-family dwelling
in Texas, an inspector observes that the footing for a continuous
foundation wall is 10 inches thick and 18 inches wide. The wall it
supports is 8 inches thick. According to the International
Residential Code (IRC), what is the primary concern?
A. Footing width is excessive
B. Footing thickness exceeds requirements
C. Footing width may be inadequate depending on soil load and wall
loading
D. Concrete strength is automatically insufficient
Answer: C. Footing width may be inadequate depending on soil load
and wall loading
Rationale: The IRC prescribes footing dimensions based on soil-bearing
capacity, number of floors supported, and wall construction. Simply
comparing footing width to wall thickness is insufficient. Inspectors must
verify compliance with IRC footing tables considering structural loading
and soil conditions.
2. Which soil condition presents the greatest concern for differential
settlement beneath residential foundations?
A. Uniform dense gravel
B. Well-compacted sandy soil
1
,C. Expansive clay with variable moisture content
D. Crushed limestone
Answer: C. Expansive clay with variable moisture content
Rationale: Texas contains extensive expansive clay soils that swell when
wet and shrink when dry. Differential movement caused by moisture
variation frequently results in foundation distress, making soil
evaluation critical.
3. The minimum required concrete compressive strength for most
residential footings unless otherwise specified is:
A. 2,000 psi
B. 2,500 psi
C. 3,000 psi
D. 5,000 psi
Answer: C. 3,000 psi
Rationale: IRC provisions generally require normal structural concrete
used in residential construction to achieve a minimum compressive
strength of 3,000 psi unless engineering or local amendments specify
otherwise.
4. Anchor bolts securing wood sill plates to concrete foundations
should generally be spaced no more than:
A. 4 feet on center
B. 5 feet on center
C. 6 feet on center
D. 8 feet on center
Answer: C. 6 feet on center
2
,Rationale: IRC requirements specify anchor bolts at maximum 6-foot
spacing, with bolts located within prescribed distances from plate ends
and around openings to provide adequate resistance against uplift and
lateral movement.
5. What is the primary purpose of foundation anchor bolts?
A. Support floor joists
B. Prevent termite infestation
C. Resist uplift and lateral displacement of the structure
D. Increase concrete strength
Answer: C. Resist uplift and lateral displacement of the structure
Rationale: Anchor bolts mechanically connect wood framing to concrete
foundations, resisting wind uplift, seismic forces where applicable, and
horizontal movement.
6. An inspector finds untreated wood framing in direct contact with
concrete foundation walls below grade. This condition is:
A. Acceptable if painted
B. Acceptable in dry climates only
C. Generally prohibited because of moisture and decay risk
D. Required for structural stability
Answer: C. Generally prohibited because of moisture and decay risk
Rationale: Wood exposed to concrete below grade is vulnerable to
moisture absorption, fungal decay, and termite attack. IRC requires
preservative-treated or naturally durable wood in such applications.
3
, 7. Crawl spaces beneath floors require access openings measuring at
least:
A. 12 × 18 inches
B. 16 × 20 inches
C. 18 × 24 inches
D. 24 × 24 inches
Answer: C. 18 × 24 inches
Rationale: IRC establishes minimum crawl-space access dimensions to
facilitate inspection, maintenance, and repairs.
8. The primary purpose of a capillary break beneath a concrete slab is
to:
A. Increase slab thickness
B. Prevent vapor and moisture migration into the slab
C. Reduce reinforcing steel requirements
D. Improve concrete curing
Answer: B. Prevent vapor and moisture migration into the slab
Rationale: Capillary breaks interrupt upward movement of groundwater
through soil into concrete slabs, reducing moisture intrusion and
flooring damage.
9. Which framing member directly supports floor joists in
conventional wood framing?
A. Ridge board
B. Stud
C. Girder or beam
D. Collar tie
4
INSPECTOR CERTIFICATION EXAM ACTUAL
2026 VERIFIED QUESTIONS WITH ANSWERS
COMPREHENSIVE & RATIONALE|INSTANT
DOWNLOAD
1. During the inspection of a newly constructed one-family dwelling
in Texas, an inspector observes that the footing for a continuous
foundation wall is 10 inches thick and 18 inches wide. The wall it
supports is 8 inches thick. According to the International
Residential Code (IRC), what is the primary concern?
A. Footing width is excessive
B. Footing thickness exceeds requirements
C. Footing width may be inadequate depending on soil load and wall
loading
D. Concrete strength is automatically insufficient
Answer: C. Footing width may be inadequate depending on soil load
and wall loading
Rationale: The IRC prescribes footing dimensions based on soil-bearing
capacity, number of floors supported, and wall construction. Simply
comparing footing width to wall thickness is insufficient. Inspectors must
verify compliance with IRC footing tables considering structural loading
and soil conditions.
2. Which soil condition presents the greatest concern for differential
settlement beneath residential foundations?
A. Uniform dense gravel
B. Well-compacted sandy soil
1
,C. Expansive clay with variable moisture content
D. Crushed limestone
Answer: C. Expansive clay with variable moisture content
Rationale: Texas contains extensive expansive clay soils that swell when
wet and shrink when dry. Differential movement caused by moisture
variation frequently results in foundation distress, making soil
evaluation critical.
3. The minimum required concrete compressive strength for most
residential footings unless otherwise specified is:
A. 2,000 psi
B. 2,500 psi
C. 3,000 psi
D. 5,000 psi
Answer: C. 3,000 psi
Rationale: IRC provisions generally require normal structural concrete
used in residential construction to achieve a minimum compressive
strength of 3,000 psi unless engineering or local amendments specify
otherwise.
4. Anchor bolts securing wood sill plates to concrete foundations
should generally be spaced no more than:
A. 4 feet on center
B. 5 feet on center
C. 6 feet on center
D. 8 feet on center
Answer: C. 6 feet on center
2
,Rationale: IRC requirements specify anchor bolts at maximum 6-foot
spacing, with bolts located within prescribed distances from plate ends
and around openings to provide adequate resistance against uplift and
lateral movement.
5. What is the primary purpose of foundation anchor bolts?
A. Support floor joists
B. Prevent termite infestation
C. Resist uplift and lateral displacement of the structure
D. Increase concrete strength
Answer: C. Resist uplift and lateral displacement of the structure
Rationale: Anchor bolts mechanically connect wood framing to concrete
foundations, resisting wind uplift, seismic forces where applicable, and
horizontal movement.
6. An inspector finds untreated wood framing in direct contact with
concrete foundation walls below grade. This condition is:
A. Acceptable if painted
B. Acceptable in dry climates only
C. Generally prohibited because of moisture and decay risk
D. Required for structural stability
Answer: C. Generally prohibited because of moisture and decay risk
Rationale: Wood exposed to concrete below grade is vulnerable to
moisture absorption, fungal decay, and termite attack. IRC requires
preservative-treated or naturally durable wood in such applications.
3
, 7. Crawl spaces beneath floors require access openings measuring at
least:
A. 12 × 18 inches
B. 16 × 20 inches
C. 18 × 24 inches
D. 24 × 24 inches
Answer: C. 18 × 24 inches
Rationale: IRC establishes minimum crawl-space access dimensions to
facilitate inspection, maintenance, and repairs.
8. The primary purpose of a capillary break beneath a concrete slab is
to:
A. Increase slab thickness
B. Prevent vapor and moisture migration into the slab
C. Reduce reinforcing steel requirements
D. Improve concrete curing
Answer: B. Prevent vapor and moisture migration into the slab
Rationale: Capillary breaks interrupt upward movement of groundwater
through soil into concrete slabs, reducing moisture intrusion and
flooring damage.
9. Which framing member directly supports floor joists in
conventional wood framing?
A. Ridge board
B. Stud
C. Girder or beam
D. Collar tie
4
