NHIE ACTUAL EXAM QUESTIONS WITH
VERIFIED SOLUTIONS MULTIPLE CHOICE
AND EXPLANATIONS 2025 GUIDE.
1. What is the most common cause of buckling in horizontal vinyl siding?
A. Reflected sunlight
B. Improper fastening
C. Condensation in walls
D. Improper house wrap
Correct Answer: B. Improper fastening
Explanation: Vinyl siding must be loosely fastened to allow for expansion and
contraction. Tight or improper fastening restricts movement, leading to
buckling.
2. At what pressure level is water pressure considered excessive in a
single-family home?
A. 60 psi
B. 80 psi
C. 100 psi
D. 120 psi
Correct Answer: B. 80 psi
Explanation: Water pressure over 80 psi can damage plumbing fixtures and
systems, requiring a pressure-reducing valve.
3. A finished basement bedroom in a newer home with electric heat
should include what safety feature?
A. Escape and rescue opening
,B. Carbon monoxide alarm
C. Fire extinguisher
D. Safety ladder
Correct Answer: A. Escape and rescue opening
Explanation: Building codes require an egress window or door for safety and
rescue in bedrooms below grade.
4. A swimming pool fence must prevent passage of a sphere larger than:
A. 2 inches
B. 3 inches
C. 4 inches
D. 5 inches
Correct Answer: C. 4 inches
Explanation: Pool safety standards require fences that prevent the passage of
a 4-inch sphere to prevent child access.
5. What should be recommended if a downspout discharges water too
close to the siding?
A. Nothing, it's fine as is
B. Add gravel under the downspout
C. Move the downspout away from siding
D. Have a contractor evaluate and repair
Correct Answer: D. Have a contractor evaluate and repair
Explanation: Water discharging near siding can cause foundation and siding
damage; a professional should assess.
6. What tool best detects moisture behind a finished surface?
A. Infrared thermometer
, B. Pin-type moisture meter
C. Non-contact moisture meter
D. Digital camera
Correct Answer: C. Non-contact moisture meter
Explanation: Non-invasive meters detect moisture behind surfaces without
damage.
7. What commonly causes failure in gas-fired furnace heat exchangers?
A. Low temperatures
B. Lack of use
C. Improper gas pressure
D. Rust and metal fatigue
Correct Answer: D. Rust and metal fatigue
Explanation: Corrosion and stress over time weaken heat exchangers,
causing cracks or leaks.
8. Relative humidity (RH) is measured in:
A. Volume
B. Percentage
C. Capacity
D. Temperature
Correct Answer: B. Percentage
Explanation: RH is expressed as the percentage of moisture in the air relative
to its maximum capacity.
9. Connecting copper and galvanized steel pipes without proper fittings
can cause:
A. Reduced water pressure
VERIFIED SOLUTIONS MULTIPLE CHOICE
AND EXPLANATIONS 2025 GUIDE.
1. What is the most common cause of buckling in horizontal vinyl siding?
A. Reflected sunlight
B. Improper fastening
C. Condensation in walls
D. Improper house wrap
Correct Answer: B. Improper fastening
Explanation: Vinyl siding must be loosely fastened to allow for expansion and
contraction. Tight or improper fastening restricts movement, leading to
buckling.
2. At what pressure level is water pressure considered excessive in a
single-family home?
A. 60 psi
B. 80 psi
C. 100 psi
D. 120 psi
Correct Answer: B. 80 psi
Explanation: Water pressure over 80 psi can damage plumbing fixtures and
systems, requiring a pressure-reducing valve.
3. A finished basement bedroom in a newer home with electric heat
should include what safety feature?
A. Escape and rescue opening
,B. Carbon monoxide alarm
C. Fire extinguisher
D. Safety ladder
Correct Answer: A. Escape and rescue opening
Explanation: Building codes require an egress window or door for safety and
rescue in bedrooms below grade.
4. A swimming pool fence must prevent passage of a sphere larger than:
A. 2 inches
B. 3 inches
C. 4 inches
D. 5 inches
Correct Answer: C. 4 inches
Explanation: Pool safety standards require fences that prevent the passage of
a 4-inch sphere to prevent child access.
5. What should be recommended if a downspout discharges water too
close to the siding?
A. Nothing, it's fine as is
B. Add gravel under the downspout
C. Move the downspout away from siding
D. Have a contractor evaluate and repair
Correct Answer: D. Have a contractor evaluate and repair
Explanation: Water discharging near siding can cause foundation and siding
damage; a professional should assess.
6. What tool best detects moisture behind a finished surface?
A. Infrared thermometer
, B. Pin-type moisture meter
C. Non-contact moisture meter
D. Digital camera
Correct Answer: C. Non-contact moisture meter
Explanation: Non-invasive meters detect moisture behind surfaces without
damage.
7. What commonly causes failure in gas-fired furnace heat exchangers?
A. Low temperatures
B. Lack of use
C. Improper gas pressure
D. Rust and metal fatigue
Correct Answer: D. Rust and metal fatigue
Explanation: Corrosion and stress over time weaken heat exchangers,
causing cracks or leaks.
8. Relative humidity (RH) is measured in:
A. Volume
B. Percentage
C. Capacity
D. Temperature
Correct Answer: B. Percentage
Explanation: RH is expressed as the percentage of moisture in the air relative
to its maximum capacity.
9. Connecting copper and galvanized steel pipes without proper fittings
can cause:
A. Reduced water pressure
