NHIE 100 EXAM QUESTIONS AND
ANSWERS 2026 VERIFIED.
1. Buckling in horizontal vinyl siding is generally caused by
A. reflected sunlight.
B. improper fastening.
C. condensation in walls.
D. improper house wrap. - ANS improper fastening
2. At what level would water pressure within a single-family dwelling begin to be considered
excessive and require correction?
A. 60 psi
B. 80 psi
C. 100 psi
D. 120 psi - ANS 80 psi
3. A newer home with electric heat is being inspected. It has a below grade finished basement
containing a bedroom. The inspector should look for a smoke alarm and
A. an escape and rescue opening.
B. a carbon monoxide alarm.
C. a fire extinguisher.
D. a safety ladder. - ANS an escape and rescue opening
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,4. A swimming pool fence must prevent passage of a sphere that is larger than
A. 2 inches.
B. 3 inches.
C. 4 inches.
D. 5 inches. - ANS 4 inches
5. Refer to the photograph to answer this question. What should an inspector recommend to
the client regarding the conditions shown in relation to the downspout/rain leader?
A. Nothing, the downspout is properly installed.
B. Gravel should be installed under the downspout.
C. The downspout should be moved away from the siding.
D. A contractor should evaluate the downspout and recommend repairs.A contractor should
evaluate the downspout and recommend repairs - ANS
6. If water infiltration is suspected behind a finished surface. What tool would be the best
choice to verify dampness?
A. an infrared thermometer
B. a pin-type moisture meter
C. a non-contact moisture meter
D. a digital camera - ANS a non-contact moisture meter
7. Gas-fired furnace heat exchangers most often fail from
A. low temperatures.
B. lack of use.
C. improper gas pressure.
D. rust and metal fatigue. - ANS rust and metal fatigue.
8. Relative Humidity (RH) is expressed as
A. volume.
2
, B. percentage.
C. capacity.
D. temperature. - ANS percentage.
9. Connections of dissimilar metal in a plumbing system, such as galvanized steel pipe and
copper pipe, will usually cause
A. reduced water pressure.
B. decreased water quality.
C. glazed pipes.
D. electrolysis. - ANS electrolysis.
10. A Ground fault circuit interrupter (GFCI) is a safety device that
A. disconnects power when the grounding to the outlet is faulty.
B. detects moisture and disconnects power in wet locations.
C. disconnects the power when sensing current leakage to ground.
D. protects against electrical surges and voltage spikes. - ANS disconnects the power
when sensing current leakage to ground
11. An electrical system with a fuse on the neutral conductor and on the energized (hot)
conductors
A. is twice as safe as a system where only the energized (hot) conductors are fused.
B. should have the neutral conductor fuse sized to one half the normal ampacity for the circuit.
C. is overfused up to 50% if used only for lighting.
D. is hazardous and should be corrected. - ANS is hazardous and should be corrected
12. To operate a central air conditioner, an electric clothes dryer, and an electric range, the
ampacity
of the service to the house should be AT LEAST
A. 100 amps at 120 volts.
B. 125 amps at 120 volts.
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ANSWERS 2026 VERIFIED.
1. Buckling in horizontal vinyl siding is generally caused by
A. reflected sunlight.
B. improper fastening.
C. condensation in walls.
D. improper house wrap. - ANS improper fastening
2. At what level would water pressure within a single-family dwelling begin to be considered
excessive and require correction?
A. 60 psi
B. 80 psi
C. 100 psi
D. 120 psi - ANS 80 psi
3. A newer home with electric heat is being inspected. It has a below grade finished basement
containing a bedroom. The inspector should look for a smoke alarm and
A. an escape and rescue opening.
B. a carbon monoxide alarm.
C. a fire extinguisher.
D. a safety ladder. - ANS an escape and rescue opening
1
,4. A swimming pool fence must prevent passage of a sphere that is larger than
A. 2 inches.
B. 3 inches.
C. 4 inches.
D. 5 inches. - ANS 4 inches
5. Refer to the photograph to answer this question. What should an inspector recommend to
the client regarding the conditions shown in relation to the downspout/rain leader?
A. Nothing, the downspout is properly installed.
B. Gravel should be installed under the downspout.
C. The downspout should be moved away from the siding.
D. A contractor should evaluate the downspout and recommend repairs.A contractor should
evaluate the downspout and recommend repairs - ANS
6. If water infiltration is suspected behind a finished surface. What tool would be the best
choice to verify dampness?
A. an infrared thermometer
B. a pin-type moisture meter
C. a non-contact moisture meter
D. a digital camera - ANS a non-contact moisture meter
7. Gas-fired furnace heat exchangers most often fail from
A. low temperatures.
B. lack of use.
C. improper gas pressure.
D. rust and metal fatigue. - ANS rust and metal fatigue.
8. Relative Humidity (RH) is expressed as
A. volume.
2
, B. percentage.
C. capacity.
D. temperature. - ANS percentage.
9. Connections of dissimilar metal in a plumbing system, such as galvanized steel pipe and
copper pipe, will usually cause
A. reduced water pressure.
B. decreased water quality.
C. glazed pipes.
D. electrolysis. - ANS electrolysis.
10. A Ground fault circuit interrupter (GFCI) is a safety device that
A. disconnects power when the grounding to the outlet is faulty.
B. detects moisture and disconnects power in wet locations.
C. disconnects the power when sensing current leakage to ground.
D. protects against electrical surges and voltage spikes. - ANS disconnects the power
when sensing current leakage to ground
11. An electrical system with a fuse on the neutral conductor and on the energized (hot)
conductors
A. is twice as safe as a system where only the energized (hot) conductors are fused.
B. should have the neutral conductor fuse sized to one half the normal ampacity for the circuit.
C. is overfused up to 50% if used only for lighting.
D. is hazardous and should be corrected. - ANS is hazardous and should be corrected
12. To operate a central air conditioner, an electric clothes dryer, and an electric range, the
ampacity
of the service to the house should be AT LEAST
A. 100 amps at 120 volts.
B. 125 amps at 120 volts.
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