OKLAHOMA HOME INSPECTOR LICENSE
EXAM QUESTIONS AND CORRECT
ANSWERS (VERIFIED ANSWERS) PLUS
RATIONALES 2025
1. What is the minimum headroom required above a stair tread in a
residential home in Oklahoma?
A. 6 feet
B. 6 feet 8 inches
C. 7 feet
D. 5 feet 10 inches
Rationale: The IRC requires at least 6 feet 8 inches of headroom measured
vertically from the tread nosing to the ceiling.
2. Which component prevents sewer gases from entering a home?
A. Check valve
B. Cleanout
C. Trap
D. Vent pipe
,Rationale: A trap is a U-shaped pipe that retains water and prevents sewer
gases from entering the living space.
3. Double tapping is generally not allowed in:
A. Gas meters
B. Circuit breakers
C. Water meters
D. Plumbing cleanouts
Rationale: Double tapping in an electrical panel can cause overheating and is
typically not permitted unless the breaker is rated for it.
4. Which roofing material typically has the shortest lifespan?
A. Metal
B. Clay tile
C. Asphalt shingles
D. Slate
Rationale: Asphalt shingles usually last 15–30 years, whereas other materials
like slate and metal have much longer lifespans.
5. A GFCI outlet is required in which of the following areas?
A. Bedroom
B. Bathroom
C. Hallway
D. Dining room
Rationale: GFCI outlets are required in wet or damp locations, including
bathrooms.
, 6. What is the purpose of a weep hole in a brick veneer wall?
A. To drain condensation from the attic
B. To ventilate the crawlspace
C. To allow moisture to escape from behind the brick
D. To allow air to enter the chimney
Rationale: Weep holes allow water that gets behind brick veneer to escape,
preventing moisture damage.
7. In Oklahoma, which document outlines standards of practice for home
inspections?
A. State building code
B. Residential Construction Manual
C. Oklahoma Standards of Practice
D. National Building Regulations
Rationale: Oklahoma has its own published standards of practice that licensed
home inspectors must follow.
8. A horizontal crack in a foundation wall is usually a sign of:
A. Settling
B. Lateral pressure
C. Shrinkage
D. Normal aging
Rationale: Horizontal cracks often indicate pressure from soil or water pushing
against the foundation.
9. What is the maximum spacing allowed between balusters on a guardrail?
EXAM QUESTIONS AND CORRECT
ANSWERS (VERIFIED ANSWERS) PLUS
RATIONALES 2025
1. What is the minimum headroom required above a stair tread in a
residential home in Oklahoma?
A. 6 feet
B. 6 feet 8 inches
C. 7 feet
D. 5 feet 10 inches
Rationale: The IRC requires at least 6 feet 8 inches of headroom measured
vertically from the tread nosing to the ceiling.
2. Which component prevents sewer gases from entering a home?
A. Check valve
B. Cleanout
C. Trap
D. Vent pipe
,Rationale: A trap is a U-shaped pipe that retains water and prevents sewer
gases from entering the living space.
3. Double tapping is generally not allowed in:
A. Gas meters
B. Circuit breakers
C. Water meters
D. Plumbing cleanouts
Rationale: Double tapping in an electrical panel can cause overheating and is
typically not permitted unless the breaker is rated for it.
4. Which roofing material typically has the shortest lifespan?
A. Metal
B. Clay tile
C. Asphalt shingles
D. Slate
Rationale: Asphalt shingles usually last 15–30 years, whereas other materials
like slate and metal have much longer lifespans.
5. A GFCI outlet is required in which of the following areas?
A. Bedroom
B. Bathroom
C. Hallway
D. Dining room
Rationale: GFCI outlets are required in wet or damp locations, including
bathrooms.
, 6. What is the purpose of a weep hole in a brick veneer wall?
A. To drain condensation from the attic
B. To ventilate the crawlspace
C. To allow moisture to escape from behind the brick
D. To allow air to enter the chimney
Rationale: Weep holes allow water that gets behind brick veneer to escape,
preventing moisture damage.
7. In Oklahoma, which document outlines standards of practice for home
inspections?
A. State building code
B. Residential Construction Manual
C. Oklahoma Standards of Practice
D. National Building Regulations
Rationale: Oklahoma has its own published standards of practice that licensed
home inspectors must follow.
8. A horizontal crack in a foundation wall is usually a sign of:
A. Settling
B. Lateral pressure
C. Shrinkage
D. Normal aging
Rationale: Horizontal cracks often indicate pressure from soil or water pushing
against the foundation.
9. What is the maximum spacing allowed between balusters on a guardrail?
