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National Home Inspector Practice Exam – Comprehensive Study and Practice Questions

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This document provides a full-length practice exam for aspiring home inspectors, covering essential topics such as structural systems, roofing, electrical, plumbing, HVAC, and safety inspections. It includes answer keys and explanations to help candidates prepare for the national certification exam.

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Terms in this set (50)

, Which of the following describes partial vapor pressure? A) Water vapor has a tendency to disperse itself equally in the available air.

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.


In order for soffit vents to operate properly, there MUST be: A) A clear air channel between the roof boards and the insulation.

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.


Home inspectors report receptacles with reversed polarity B) They increase the shock likelihood at connected equipment.
as potentially hazardous 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.


The term "wet vent" refers to a: D) Waste line that also functions as a vent.

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.


EIFS is a siding material that: B) Looks like stucco but lacks a wire mesh.

A) Is used in commercial buildings only.
B) Looks like stucco but lacks a wire mesh.
C) Can be installed on top of a modified bitumen
membrane.
D) Can be installed on top of a masonry surface.


The joints on the exterior of the brick chimney should be: A) Concaved

A) Concaved.
B) Raked.
C) Open.
D) Closed.


When a water heater thermostat is set at 140 ° F or higher, C) Mixing valve
a ______ should be installed to temper the water.

A) Temperature probe
B) Mixing probe
C) Mixing valve
D) Temper valve


In a forced air furnace, the burners are used to generate A) Heat exchanger.
heat in the:

A) Heat exchanger.
B) Draft diverter.
C) Flue.
D) Plenum.


While inspecting a crawl space, you should probe for B) Floor joist
decay if the _________ is dark in appearance.

A) King joist
B) Floor joist
C) Masonry wall
D) Bearing wall


Which statement BEST describes the action a home A) Determine the degree of immediacy, and report to the appropriate parties.
inspector should take when a safety issue is found in a
home?

A) Determine the degree of immediacy, and report to the
appropriate parties.
B) Explain verbally to the client, but do not include in a
written report.
C) Repair the problem when possible.
D) Shut down the system and call a repair contractor.


Ivy has grown across the entire exterior brick wall surfaces C) Could cause damage to the surface and recommend removal.
of a one-family house. The home inspector should report
that the ivy:

A) Will increase the resale value.
B) Will keep the home cooler in the summer.
C) Could cause damage to the surface and recommend
removal.
D) Needs additional maintenance and support to remain
on the wall surfaces.

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April 1, 2026
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