National Home Inspector Practice Exam
Practice Questions and Detailed
Solutions 2025/ 2026
1. Which of the following describes partial vapor pressure?
A) Water vapor has a tendency to disperse itself equally in the available air.
B) Water vapor causes new homes to require house wrap.
C) Water vapor is common with forced induction natural gas furnaces.
D) Water vapor is an indication of sick house syndrome
Answer: A) Water vapor has a tendency to disperse itself equally in the available air.
2. In order for soffit vents to operate properly, there MUST be:
A) A clear air channel between the roof boards and the insulation.
B) An absence of insect, bee, and bird nests.
C) Vents on both ends on the outside.
D) Continuous vent strips on the length of the soffit.:
mailto:https://www.stuvia.com/user/Wisdoms
, Answer A) A clear air channel between the roof boards and the insulation.
3. Home inspectors report receptacles with reversed polarity as
potentially haz- ardous because:
A) They contribute to the overheating of the receptacle.
B) They increase the shock likelihood at connected equipment.
C) Single phase appliance motors will run backwards.
D) They trip ground fault circuit interrupter outlets.:
Answer B) They increase the shock likelihood at connected equipment.
4. The term "wet vent" refers to a:
A) Vent that traps water and therefore stays wet.
B) Vent located above the roof line and exposed to rain.
C) Vent that runs outside an exterior wall.
D) Waste line that also functions as a vent.:
Answer D) Waste line that also functions as a vent.
5. EIFS is a siding material that:
A) Is used in commercial buildings only.
B) Looks like stucco but lacks a wire mesh.
mailto:https://www.stuvia.com/user/Wisdoms
, C) Can be installed on top of a modified bitumen membrane.
D) Can be installed on top of a masonry surface.:
Answer B) Looks like stucco but lacks a wire mesh.
6. The joints on the exterior of the brick chimney should be:
A) Concaved.
B) Raked.
C) Open.
D) Closed.:
Answer A) Concaved
7. When a water heater thermostat is set at 140 ° F or higher, a
should be installed to temper the water.
A) Temperature probe
B) Mixing probe
C) Mixing valve
D) Temper valve:
Answer C) Mixing valve
8. In a forced air furnace, the burners are used to generate heat in the:
mailto:https://www.stuvia.com/user/Wisdoms
Practice Questions and Detailed
Solutions 2025/ 2026
1. Which of the following describes partial vapor pressure?
A) Water vapor has a tendency to disperse itself equally in the available air.
B) Water vapor causes new homes to require house wrap.
C) Water vapor is common with forced induction natural gas furnaces.
D) Water vapor is an indication of sick house syndrome
Answer: A) Water vapor has a tendency to disperse itself equally in the available air.
2. In order for soffit vents to operate properly, there MUST be:
A) A clear air channel between the roof boards and the insulation.
B) An absence of insect, bee, and bird nests.
C) Vents on both ends on the outside.
D) Continuous vent strips on the length of the soffit.:
mailto:https://www.stuvia.com/user/Wisdoms
, Answer A) A clear air channel between the roof boards and the insulation.
3. Home inspectors report receptacles with reversed polarity as
potentially haz- ardous because:
A) They contribute to the overheating of the receptacle.
B) They increase the shock likelihood at connected equipment.
C) Single phase appliance motors will run backwards.
D) They trip ground fault circuit interrupter outlets.:
Answer B) They increase the shock likelihood at connected equipment.
4. The term "wet vent" refers to a:
A) Vent that traps water and therefore stays wet.
B) Vent located above the roof line and exposed to rain.
C) Vent that runs outside an exterior wall.
D) Waste line that also functions as a vent.:
Answer D) Waste line that also functions as a vent.
5. EIFS is a siding material that:
A) Is used in commercial buildings only.
B) Looks like stucco but lacks a wire mesh.
mailto:https://www.stuvia.com/user/Wisdoms
, C) Can be installed on top of a modified bitumen membrane.
D) Can be installed on top of a masonry surface.:
Answer B) Looks like stucco but lacks a wire mesh.
6. The joints on the exterior of the brick chimney should be:
A) Concaved.
B) Raked.
C) Open.
D) Closed.:
Answer A) Concaved
7. When a water heater thermostat is set at 140 ° F or higher, a
should be installed to temper the water.
A) Temperature probe
B) Mixing probe
C) Mixing valve
D) Temper valve:
Answer C) Mixing valve
8. In a forced air furnace, the burners are used to generate heat in the:
mailto:https://www.stuvia.com/user/Wisdoms
