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DELAWARE HOME INSPECTOR LICENSE EXAM QUESTIONS AND CORRECT ANSWERS (VERIFIED ANSWERS) P, Exams of Real Estate Management

Delaware State University (DSU)Real Estate Management

DELAWARE HOME INSPECTOR LICENSE EXAM QUESTIONS AND CORRECT ANSWERS (VERIFIED ANSWERS) PLUS RATIONALES 2025

Typology: Exams

2024/2025

Available from 06/25/2025

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DELAWARE HOME INSPECTOR
LICENSE EXAM QUESTIONS AND
CORRECT ANSWERS (VERIFIED
ANSWERS) PLUS RATIONALES 2025
1. What is the primary purpose of a home inspection?
To evaluate the condition of the property
A home inspection aims to identify the physical condition of the
home to inform buyers or sellers before a transaction.
2. When inspecting a roof, what should a home inspector look
for?
Signs of damage such as missing shingles or leaks
Damaged or missing shingles can lead to leaks and structural
damage, so identifying them is critical.
3. What is the minimum slope for a properly installed roof
drainage system?
1/4 inch per foot
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DELAWARE HOME INSPECTOR

LICENSE EXAM QUESTIONS AND

CORRECT ANSWERS (VERIFIED

ANSWERS) PLUS RATIONALES 2025

  1. What is the primary purpose of a home inspection? To evaluate the condition of the property A home inspection aims to identify the physical condition of the home to inform buyers or sellers before a transaction.
  2. When inspecting a roof, what should a home inspector look for? Signs of damage such as missing shingles or leaks Damaged or missing shingles can lead to leaks and structural damage, so identifying them is critical.
  3. What is the minimum slope for a properly installed roof drainage system? 1/4 inch per foot

This slope ensures water drains properly off the roof, preventing pooling and damage.

  1. What does GFCI stand for? Ground Fault Circuit Interrupter GFCIs protect against electrical shock by breaking the circuit when there is a difference in current.
  2. During an inspection, the inspector finds a cracked foundation wall. What is the inspector's responsibility? Report the defect and recommend further evaluation by a structural engineer Home inspectors identify defects but should not diagnose structural problems beyond their scope.
  3. What type of insulation is most commonly found in attics? Fiberglass batts or blown-in cellulose These types are effective for thermal insulation in attic spaces.
  4. What is the normal operating temperature range for a water heater? 120 to 140 degrees Fahrenheit This range prevents scalding and reduces energy consumption.
  5. When inspecting HVAC systems, what component indicates the system’s efficiency? The SEER rating (Seasonal Energy Efficiency Ratio) SEER measures cooling efficiency; higher values indicate better efficiency.

Adequate clearance is needed for safe access and maintenance.

  1. Which material is commonly used for underground water service lines? Copper or PEX Copper is durable; PEX is flexible and resistant to corrosion.
  2. What is the primary cause of mold growth in homes? Excess moisture and poor ventilation Moisture creates a conducive environment for mold, which can affect health.
  3. What is the minimum depth a frost line usually reaches in Delaware? About 30 inches The frost line depth affects foundation and pipe installation to prevent frost heave.
  4. What is the purpose of an expansion tank in a hot water heating system? To absorb pressure changes due to thermal expansion It prevents excessive pressure that could damage the system.
  5. What type of venting is required for gas water heaters? Properly sized metal venting to the outside Correct venting ensures combustion gases are safely expelled.
  1. What is a common cause of sagging floors? Damaged or undersized floor joists Joists carry the floor load; if compromised, sagging occurs.
  2. What is a defect in window operation that a home inspector should report? Windows that do not open or close properly Impaired operation can be a safety and egress issue.
  3. What is the primary function of flashing around windows and doors? To prevent water intrusion Flashing directs water away to avoid leaks and rot.
  4. What type of wood is most resistant to rot for exterior use? Cedar or pressure-treated lumber These woods resist decay and insect damage.
  5. When inspecting plumbing, what indicates a galvanized pipe? A dull gray metallic appearance with rust spots Galvanized pipes corrode internally and may restrict water flow.
  6. What should an inspector do if they find knob-and-tube wiring? Note it as an outdated system and recommend evaluation by an electrician
  1. What should an inspector do if a window is blocked and cannot be used as an emergency exit? Report the issue and note the lack of proper egress Proper egress windows are required for safety in bedrooms.
  2. What type of heating system uses water to distribute heat? Hydronic heating system Water circulates through pipes to radiators or baseboards.
  3. What is the typical height of a residential ceiling? 8 feet Standard ceiling height, though it may vary in some homes.
  4. How can an inspector identify aluminum wiring? By the dull silver color and markings on the wire insulation Aluminum wiring is a known fire risk if not properly connected.
  5. What is the typical spacing of wood floor joists in residential construction? 16 inches on center This spacing balances structural support and material efficiency.
  6. What is the minimum clearance required for an appliance gas connector? 6 feet or less, flexible connector length Flexible connectors should not exceed this length to maintain safety.
  1. What causes efflorescence on masonry walls? Water soluble salts leaching through masonry Efflorescence is a white powdery deposit caused by moisture movement.
  2. What is the function of a plumb bob? To check vertical alignment A plumb bob is a simple tool to ensure structures are straight up and down.
  3. What is a common sign of inadequate attic ventilation? Excessive heat and moisture buildup causing mold or rot Ventilation helps regulate temperature and moisture levels.
  4. What should be included in a home inspection report? Observations, defects, and recommendations A thorough report informs clients about the property’s condition.
  5. What type of foundation is common in Delaware homes? Concrete slab or crawl space foundations These are typical foundation types adapted to local soil and climate.
  6. How often should a home’s septic system be inspected? Every 3 years Regular inspection prevents failures and costly repairs.
  7. What is the acceptable moisture content for wood used in framing?

A moisture meter Moisture meters detect elevated moisture levels in materials not visible to the eye.

  1. What is the typical thickness of drywall used for interior walls? 1/2 inch This thickness balances durability and ease of installation for most residential interiors.
  2. Which tool is used to detect leaks in a gas system? A gas leak detector or soapy water solution Gas leak detectors sense combustible gases; soapy water bubbles at leak points.
  3. What is the maximum distance between deck joists in residential construction? 16 inches on center Spacing ensures structural integrity and load distribution.
  4. What is the primary hazard associated with asbestos in older homes? Inhalation of asbestos fibers causing respiratory diseases Asbestos fibers are hazardous when airborne and inhaled over time.
  5. How should an inspector check for proper attic insulation? Measure the depth and type of insulation present

Adequate insulation depth ensures energy efficiency and comfort.

  1. What is the function of a drip edge on a roof? To direct water away from the fascia and prevent water damage Drip edges protect roof edges from rot and erosion.
  2. What is the typical height of a stair riser in residential construction? 7 to 7 3/4 inches This height complies with most building codes for safety and comfort.
  3. What is the minimum tread depth for residential stairs? 10 inches Ensures safe footing when ascending or descending stairs.
  4. Which type of window is easiest to clean from inside the home? Double-hung windows with tilt-in sashes Tilt-in sashes allow cleaning both sides from inside.
  5. What causes cracks in drywall around windows and doors? Building settling or thermal expansion/contraction Movement of the building frame stresses drywall joints causing cracks.
  1. What electrical wire gauge is commonly used for 15-amp circuits? 14 gauge This size safely carries 15 amps without overheating.
  2. What is the main risk of using aluminum wiring in homes? Loose connections causing overheating and fire risk Aluminum expands and contracts more than copper, loosening connections.
  3. What type of heating system distributes warm air through ducts? Forced-air heating system Heated air is pushed through ducts by a blower to heat rooms.
  4. What is the minimum height of a chimney above a roof? At least 3 feet above the roof and 2 feet higher than any structure within 10 feet This ensures proper draft and reduces fire hazards.
  5. What is a common cause of foundation cracks? Soil movement due to moisture changes Expanding or contracting soils stress foundation materials.
  6. What does the term “on center” mean in construction? The distance from the center of one framing member to the center of the next Used for consistent spacing of studs, joists, and rafters.
  1. What is the primary purpose of grounding in electrical systems? To provide a safe path for electrical current in case of a fault Grounding reduces shock risk and electrical fires.
  2. What is the normal operating pressure for a residential water system? 40 to 80 psi Pressure outside this range can damage plumbing fixtures or pipes.
  3. What is a common defect in homes with crawl spaces? Poor ventilation leading to moisture buildup Leads to mold, wood rot, and pest infestation.
  4. What tool can be used to check the flatness of a floor? A level or laser level Ensures floors are even and free from dips or bumps.
  5. What is the typical lifespan of a galvanized steel pipe? 20 to 50 years They corrode internally over time, leading to flow restrictions.
  6. How does a thermal imaging camera assist a home inspector? By detecting temperature differences indicating leaks or insulation gaps Non-invasive tool for locating hidden moisture or electrical issues.

1/4 inch to 3/8 inch Allows for material expansion and contraction without cracking.

  1. What is a common cause of uneven floors in older homes? Settling of the foundation or joist damage Shifting soil or structural issues cause floor irregularities.
  2. What type of insulation has the highest R-value per inch? Spray foam insulation Provides excellent thermal resistance and air sealing.
  3. What is the minimum number of electrical outlets required in a residential kitchen? At least two 20-amp circuits with multiple outlets To safely power appliances and comply with code.
  4. What is the purpose of a chimney liner? To protect the chimney walls and improve venting Liners prevent heat damage and improve draft efficiency.
  5. What is a common defect found in older plumbing systems? Lead piping or fixtures Lead is hazardous and has been banned in new installations.
  6. What is the minimum slope required for a sewer line? 1/4 inch per foot Ensures proper gravity flow and prevents blockages.
  1. What is the primary purpose of house wrap on exterior walls? To provide a weather-resistant barrier that allows moisture vapor to escape Protects the structure from water intrusion while preventing mold.
  2. What is the standard width of an interior door in residential homes? 30 to 32 inches Allows comfortable passage and accessibility.
  3. What should an inspector look for in crawl space vapor barriers? Tears, gaps, or improper installation Defects reduce effectiveness in controlling moisture.
  4. How should a sump pump discharge be directed? Away from the foundation and not into the sewer system Prevents water from re-entering the home or sewer backups.
  5. What is the minimum height of a guardrail on a residential porch? 36 inches Prevents falls and complies with safety codes.
  6. What is the most common cause of sewer odor in homes? Dry P-traps or venting issues Water seals prevent sewer gases from entering the home.
  1. What is the most common framing material in Delaware homes? Wood Wood framing is standard in most residential construction.
  2. What does a home inspector use to check for radon? A radon test kit Measures radon gas levels, a health hazard in some areas.
  3. What is the function of roof trusses? To support the roof structure Pre-fabricated for strength and efficiency.
  4. What is a key indicator of water damage on ceilings? Staining or discoloration Usually caused by leaks or condensation.
  5. What type of pipe is prone to corrosion and failure in older homes? Galvanized steel Corrodes internally over time reducing flow and risking leaks.
  6. What is the purpose of weep screeds in stucco walls? To allow moisture to escape from the wall assembly Prevents water damage and mold growth.
  7. What is the minimum thickness of a concrete footing? 8 inches Provides adequate support for foundation loads.
  1. What causes spalling in concrete? Freeze-thaw cycles causing surface cracking and flaking Water penetration and freezing damages the surface.
  2. What is the minimum distance between a gas meter and a source of ignition? 18 inches Safety regulation to prevent fires.
  3. What type of foundation crack is most concerning? Horizontal cracks wider than 1/4 inch May indicate structural failure requiring engineer evaluation.
  4. What tool is used to measure moisture content in wood? Moisture meter Detects elevated moisture that can cause rot or mold.
  5. What is the recommended attic ventilation ratio? 1 square foot of ventilation per 150 square feet of attic floor space Ensures adequate airflow to reduce moisture and heat.
  6. What is a common defect in plumbing fixtures? Leaking faucets or toilets Can cause water damage and increase utility costs.
  7. What is the function of a circuit breaker? To interrupt electrical flow during an overload or short circuit Protects wiring and appliances from damage.