InterNACHI Questions and Answers |
Latest Version | 2025/2026 | Correct &
Verified
Which part of a home is most susceptible to water intrusion during heavy rainfall?
A) Roof
B) Basement
C) Windows
D) All of the above
✔✔D) All of the above
Why is it important to inspect the attic insulation?
A) To check for pests only
B) To assess energy efficiency and detect moisture issues
C) To inspect the roof from inside
D) To find electrical wiring
✔✔B) To assess energy efficiency and detect moisture issues
Which type of crack in a foundation is typically considered serious?
A) Hairline crack
B) Horizontal crack
C) Small vertical crack
D) None of the above
1
,✔✔B) Horizontal crack
Why should a home inspector check for GFCI outlets?
A) To ensure kitchen appliances work
B) To prevent electrical shock in wet areas
C) To test breaker functionality
D) To measure voltage
✔✔B) To prevent electrical shock in wet areas
Which sign indicates potential roof leakage?
A) Missing shingles
B) Water stains on the ceiling
C) Mold in the attic
D) All of the above
✔✔D) All of the above
Why is it important to inspect HVAC ductwork?
A) To measure airflow
B) To check for leaks, mold, or blockages
C) To calculate heating costs
D) To clean dust only
✔✔B) To check for leaks, mold, or blockages
2
,Which material is commonly inspected for rot in exterior structures?
A) Concrete
B) Wood
C) Metal
D) Glass
✔✔B) Wood
Why should a home inspector test smoke and carbon monoxide detectors?
A) To check alarm volume
B) To ensure they are functioning for safety
C) To see if batteries are easy to replace
D) To locate them in the house
✔✔B) To ensure they are functioning for safety
Which sign indicates a plumbing leak behind walls?
A) Low water pressure
B) Discolored paint or wallpaper
C) Mold growth
D) All of the above
✔✔D) All of the above
Why is inspecting the roof flashing important?
A) To prevent water penetration around chimneys and vents
3
, B) To enhance aesthetics
C) To check insulation
D) To measure slope
✔✔A) To prevent water penetration around chimneys and vents
Which component prevents sewer gases from entering the home?
A) Vent stack
B) P-trap
C) Water heater
D) Drainage pipe
✔✔B) P-trap
Why should a home inspector examine exterior grading?
A) To check for landscape beauty
B) To ensure water drains away from the foundation
C) To locate sprinkler systems
D) To check for erosion only
✔✔B) To ensure water drains away from the foundation
Which sign suggests electrical overload in a home?
A) Warm outlets
B) Frequent breaker trips
C) Burn marks around outlets
4
Latest Version | 2025/2026 | Correct &
Verified
Which part of a home is most susceptible to water intrusion during heavy rainfall?
A) Roof
B) Basement
C) Windows
D) All of the above
✔✔D) All of the above
Why is it important to inspect the attic insulation?
A) To check for pests only
B) To assess energy efficiency and detect moisture issues
C) To inspect the roof from inside
D) To find electrical wiring
✔✔B) To assess energy efficiency and detect moisture issues
Which type of crack in a foundation is typically considered serious?
A) Hairline crack
B) Horizontal crack
C) Small vertical crack
D) None of the above
1
,✔✔B) Horizontal crack
Why should a home inspector check for GFCI outlets?
A) To ensure kitchen appliances work
B) To prevent electrical shock in wet areas
C) To test breaker functionality
D) To measure voltage
✔✔B) To prevent electrical shock in wet areas
Which sign indicates potential roof leakage?
A) Missing shingles
B) Water stains on the ceiling
C) Mold in the attic
D) All of the above
✔✔D) All of the above
Why is it important to inspect HVAC ductwork?
A) To measure airflow
B) To check for leaks, mold, or blockages
C) To calculate heating costs
D) To clean dust only
✔✔B) To check for leaks, mold, or blockages
2
,Which material is commonly inspected for rot in exterior structures?
A) Concrete
B) Wood
C) Metal
D) Glass
✔✔B) Wood
Why should a home inspector test smoke and carbon monoxide detectors?
A) To check alarm volume
B) To ensure they are functioning for safety
C) To see if batteries are easy to replace
D) To locate them in the house
✔✔B) To ensure they are functioning for safety
Which sign indicates a plumbing leak behind walls?
A) Low water pressure
B) Discolored paint or wallpaper
C) Mold growth
D) All of the above
✔✔D) All of the above
Why is inspecting the roof flashing important?
A) To prevent water penetration around chimneys and vents
3
, B) To enhance aesthetics
C) To check insulation
D) To measure slope
✔✔A) To prevent water penetration around chimneys and vents
Which component prevents sewer gases from entering the home?
A) Vent stack
B) P-trap
C) Water heater
D) Drainage pipe
✔✔B) P-trap
Why should a home inspector examine exterior grading?
A) To check for landscape beauty
B) To ensure water drains away from the foundation
C) To locate sprinkler systems
D) To check for erosion only
✔✔B) To ensure water drains away from the foundation
Which sign suggests electrical overload in a home?
A) Warm outlets
B) Frequent breaker trips
C) Burn marks around outlets
4
