Home Inspector Practice Test PDF (Free Printable 2026)

Home Inspector Practice Test PDF

The National Home Inspector Examination (NHIE) is the primary licensing exam for home inspectors across the United States. Administered by PSI Exams, the NHIE is recognized by InterNACHI, ASHI, and most state licensing boards as the professional standard for entry into the home inspection field. The exam consists of approximately 200 questions covering every major system of a residential structure, and candidates must demonstrate broad knowledge of building science, safety standards, and professional reporting practices.

Preparing with a printed study resource gives you the flexibility to review material away from a screen, mark up questions, and work through deficiency scenarios at your own pace. Our free Home Inspector Test practice questions are available in both online and printable formats, so you can tailor your study sessions to what works best for you.

The NHIE is organized around three primary domains: property and building inspection; analysis of findings and reporting; and professional responsibilities. Each domain carries a different question weight, so understanding how points are distributed helps you prioritize study time. Property and building inspection—covering roofing, structure, electrical, plumbing, HVAC, and interior systems—accounts for the largest share of the exam and demands the most thorough preparation.

State licensing requirements vary. Some states accept the NHIE score directly; others require additional state-specific coursework or proctored exams. Regardless of your jurisdiction, mastering the content tested on the NHIE will prepare you for the full range of state-level questions as well, since both draw from the same body of knowledge: ASTM standards, HUD guidelines, and widely accepted inspection practices.

What the NHIE Tests: Core Knowledge Areas

A successful home inspector must be able to assess every major system of a home and communicate findings clearly in a written report. The NHIE tests knowledge across all of the following systems.

Roofing Systems

Roofing questions on the NHIE cover material identification, condition assessment, and common deficiencies. Candidates should be able to distinguish asphalt shingles—three-tab vs. architectural—and know their typical service life. Flashing materials at valleys, chimneys, and wall intersections are a frequent exam topic because improper flashing is one of the most common sources of water intrusion. Gutters and downspouts are evaluated for proper slope, secure attachment, and discharge location away from the foundation. Roof vents—ridge vents, soffit vents, power attic ventilators—must be assessed for adequate net free area. Skylights are inspected for curb height, sealant condition, and signs of condensation or leaking. Chimney inspections include mortar joint condition, cap presence, flashing adequacy, and clearance from combustibles.

Structural Systems

Structural questions address foundation types and their associated risks. Poured concrete foundations are generally the strongest and most crack-resistant when properly reinforced, but horizontal cracks in block foundations can indicate lateral soil pressure requiring further evaluation by a structural engineer. Concrete block (CMU) foundations are common in older construction and are more susceptible to water infiltration through mortar joints. Crawl space vs. basement configurations each carry distinct inspection concerns: crawl spaces require adequate ventilation or an encapsulation system to prevent moisture buildup and wood rot, while basements must be assessed for water intrusion, efflorescence, and sump pump function.

Framing components—floor joists, rafters, trusses, headers, and bearing walls—are evaluated for proper size, spacing, notching, and any signs of modification or damage. Inspectors must recognize when a bearing wall has been altered without proper header installation and flag it as a potential structural concern.

Exterior Systems

Exterior siding inspection covers wood, vinyl, brick, and stucco. Wood siding is checked for paint failure, rot, and ground contact. Vinyl siding is evaluated for proper lapping, secure fastening, and adequate clearance at the base to prevent wicking. Brick veneer is inspected for efflorescence, spalling, and weep hole presence. Stucco requires attention to control joints, cracks, and any signs of moisture behind the cladding. Grading and drainage are critical: the NHIE expects candidates to know that finished grade should slope away from the foundation at a minimum of 6 inches over the first 10 feet to direct surface water away from the structure.

Electrical Systems

Electrical questions are among the most heavily tested on the NHIE. Candidates must understand service panel layout, breaker sizing, and double-tapping (two conductors under a single breaker terminal)—a common deficiency flagged during inspection. The exam tests knowledge of 3-wire vs. 2-wire branch circuit systems and when GFCI (ground-fault circuit interrupter) and AFCI (arc-fault circuit interrupter) protection are required by the NEC. Aluminum branch wiring from the 1960s and 1970s is a significant safety concern because of its expansion/contraction characteristics and the risk of loose connections at outlets and switches; inspectors must recognize stranded aluminum wiring and note required remediation. Knob-and-tube wiring in older homes is noted for its lack of a grounding conductor and incompatibility with insulation contact.

Plumbing Systems

Plumbing knowledge on the NHIE covers supply and drain systems, water heater inspection, and pipe material identification. Candidates should recognize polybutylene (gray plastic) piping—widely used from 1978 to 1995 and associated with failure at fittings—as a material warranting disclosure. Lead supply piping in pre-1986 construction is another disclosure item. Water heaters are inspected for age (manufacturer date code), proper temperature and pressure relief valve installation with a discharge pipe to within 6 inches of the floor, adequate combustion air, and correct flue venting. Drain, waste, and vent (DWV) systems are checked for proper slope (1/4 inch per foot for most horizontal drains), trap presence at each fixture, and vent termination above the roofline.

HVAC Systems

HVAC inspection covers furnace age and condition, heat exchanger integrity, air conditioning refrigerant lines (insulation on suction line, no visible damage), ductwork for proper sizing and support, and supply/return balance throughout the home. A cracked heat exchanger is one of the most serious findings an inspector can make because it allows combustion gases—including carbon monoxide—to enter the living space. NHIE questions on HVAC also address thermostat operation, filter condition, and proper clearance around the outdoor condenser unit.

Interior Systems

Interior inspection includes attic insulation levels and ventilation adequacy, signs of moisture intrusion at ceilings and walls, window and door operation and seal integrity, staircase safety (guardrail height, baluster spacing no greater than 4 inches, handrail continuity), and smoke and carbon monoxide detector placement. Inspectors must distinguish between observations that require immediate repair (deficiencies) and items that are noted for informational purposes only, such as maintenance recommendations or items beyond the scope of a general inspection.

Writing the Report: Deficiencies vs. Informational Items

The NHIE tests not only technical knowledge but also professional reporting practices. A well-written inspection report clearly distinguishes between safety hazards requiring immediate correction, deficiencies that need repair, items to monitor, and informational observations about the age or remaining useful life of components. Candidates should understand ASHI's Standards of Practice and how they define the scope and limitations of a general home inspection—what inspectors are required to inspect, what is excluded, and how findings must be communicated to the client.

How to Use the PDF Practice Test

Print the PDF and work through each question without looking at the answer key first. Time yourself—the NHIE allows a set testing window, so practicing under mild time pressure helps build the pacing habits you need on exam day. After completing a section, review every question you answered, not just the ones you got wrong. Understanding why a correct answer is correct reinforces the principle so you can apply it to differently worded questions on the real exam.

Focus extra attention on electrical and structural questions, since those domains carry heavier weight and involve the judgment calls that distinguish a competent inspector from one who is guessing. For roofing and exterior questions, supplement your reading with photos of actual deficiencies—many home inspection training organizations publish photo libraries of common findings that make textbook descriptions much easier to visualize.

Use the PDF alongside the online practice questions available on the Home Inspector Test page, where you get immediate feedback on each answer. The combination of timed printed review and interactive online testing gives you the broadest possible preparation.

Roofing and Structural Deep Dive

Of all the knowledge areas on the NHIE, roofing and structural systems generate the most varied exam questions because conditions vary enormously by region, construction era, and building type. An inspector working in the Pacific Northwest will encounter cedar shake and metal roofing far more often than one working in the Mid-Atlantic, where asphalt shingles dominate. The NHIE tests general principles applicable everywhere, but your state exam may include region-specific questions about local building codes, weather-driven standards like wind uplift requirements in hurricane zones, or frost-depth requirements for foundation footings in cold climates.

For structural systems, the most commonly tested judgment call is distinguishing a settling crack from an active structural crack. Hairline cracks at corners of door and window openings are typical of normal settlement and are noted as informational. Step cracks in brick mortar joints following the joint pattern indicate differential settlement and should be flagged as requiring further evaluation. Horizontal cracks in basement block walls—particularly bowing inward—indicate lateral soil pressure and are among the most serious structural findings an inspector can make.

Familiarize yourself with wood-destroying organism (WDO) concerns even if your state separates WDO inspection from general home inspection. The NHIE includes questions about recognizing conditions conducive to wood rot and termite activity—moisture-laden wood, ground contact, inadequate ventilation—because inspectors are expected to note these conditions and recommend further evaluation by a licensed pest inspector.

Electrical and Plumbing: High-Stakes Knowledge Areas

Electrical deficiencies are flagged more often than deficiencies in any other system during actual home inspections, which is why the NHIE weights electrical knowledge heavily. The most commonly cited issues in practice—and on the exam—are double-tapped breakers, missing GFCI protection at required locations (bathrooms, kitchens within 6 feet of a sink, garages, outdoors, crawl spaces, unfinished basements), open junction boxes, reversed polarity at outlets, and improper use of extension cords as permanent wiring. Each of these issues has a clear remediation: a licensed electrician must make all corrections to the service panel, and GFCI outlets or breakers must be installed at all required locations.

Plumbing questions on the NHIE frequently involve water heater inspection because water heaters are universally present and carry a range of potential safety and maintenance issues. The temperature and pressure relief (TPR) valve is the most safety-critical component: it must be installed on the water heater tank (not on the supply line), must have a discharge pipe that terminates no higher than 6 inches above the floor or drain, and must not be piped to a threaded cap or plug. Candidates should also know the recommended water heater temperature setting (120°F for scalding prevention) and how to determine water heater age from the manufacturer's serial number date code.