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MASSACHUSETTS HOME INSPECTOR LICENSE PRACTICE EXAM QUESTIONS AND CORRECT ANSWERS (VERIFI, Exams of Real Estate Management

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

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2024/2025

Available from 06/25/2025

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MASSACHUSETTS HOME INSPECTOR
LICENSE PRACTICE 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 a property and identify major defects
A home inspection assesses the current condition of a property to inform
buyers or sellers about its structural and mechanical state.
2. When inspecting a roof, which material is most prone to cracking in cold
weather?
Asphalt shingles
Asphalt shingles can become brittle and crack in cold weather due to
temperature fluctuations.
3. What is the minimum clearance recommended between the soil and
wooden siding?
6 inches
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MASSACHUSETTS HOME INSPECTOR

LICENSE PRACTICE 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 a property and identify major defects A home inspection assesses the current condition of a property to inform buyers or sellers about its structural and mechanical state.
  2. When inspecting a roof, which material is most prone to cracking in cold weather? Asphalt shingles Asphalt shingles can become brittle and crack in cold weather due to temperature fluctuations.
  3. What is the minimum clearance recommended between the soil and wooden siding? 6 inches

This clearance helps prevent moisture wicking into the wood and potential wood rot.

  1. What type of electrical wiring was commonly used before 1950 and is considered unsafe? Knob-and-tube wiring Knob-and-tube wiring lacks grounding and insulation, increasing fire risks.
  2. Which system is responsible for removing wastewater from a home? The plumbing drainage system The drainage system carries wastewater away from fixtures and out of the home to the sewer or septic system.
  3. How often should a chimney be inspected to ensure safety? Annually Chimneys should be inspected yearly to check for blockages, cracks, and buildup that could cause fires or carbon monoxide hazards.
  4. What is the typical lifespan of a modern asphalt roof? 20 to 30 years Asphalt roofs generally last between 20 and 30 years, depending on quality and maintenance.
  5. What is the function of a GFCI outlet? To prevent electrical shock by shutting off power when a ground fault is detected Ground Fault Circuit Interrupters protect users from shocks in wet or damp areas by cutting power quickly.

Heat exchangers transfer heat from combustion gases to air or water that heats the home. 15.What is the main purpose of a vapor barrier in walls? To prevent moisture from passing through and condensing inside wall cavities Vapor barriers control moisture migration, reducing mold and rot risks. 16.What tool is commonly used to check for moisture in wood? Moisture meter Moisture meters detect water content in wood, helping identify leaks or rot. 17.What is the normal operating temperature range for a hot water heater? 120 to 140 degrees Fahrenheit This range balances safety and energy efficiency while preventing scalding. 18.What is the maximum allowable spacing for floor joists in a typical residential floor? 16 inches on center Joists spaced 16 inches apart provide adequate support for most residential floors. 19.What condition of the attic ventilation system is considered adequate? Balanced intake and exhaust vents providing continuous airflow Proper ventilation helps control moisture and temperature, extending roof life and preventing mold.

20.What is a common sign of termite infestation in a home? Mud tubes on foundation walls Termites build mud tubes to protect themselves as they travel between soil and wood. 21.What type of foundation is most common in Massachusetts homes? Concrete block foundation Concrete block foundations are durable and commonly used in this region. 22.What is the typical thickness of drywall used on interior walls? 1/2 inch Standard interior walls usually have 1/2-inch drywall for strength and fire resistance. 23.How should the inspector verify the operation of the HVAC system? Turn it on and observe heating and cooling functions Operating the system ensures it functions correctly and reveals any irregularities. 24.Which part of the electrical panel is designed to interrupt power during an overload? Circuit breaker Circuit breakers prevent electrical fires by shutting off power during overloads or faults. 25.What is the recommended distance between a gas appliance and combustible materials? At least 6 inches This clearance prevents fire hazards near gas appliances.

32.Which type of window frame material requires the least maintenance? Vinyl Vinyl frames resist rot and do not require painting. 33.What is the purpose of a sill plate in framing? To anchor the building structure to the foundation The sill plate connects framing to the foundation and distributes loads. 34.What is the common cause of a strong musty odor in a basement? Mold or mildew growth Poor ventilation and moisture lead to mold, which produces musty odors. 35.What is the maximum allowed gap for attic hatch weatherstripping to be considered effective? 1/8 inch Small gaps reduce air leakage and improve energy efficiency. 36.Which of the following is a common sign of electrical overheating? Discolored or melted outlets and switches Overheating can damage electrical components and poses fire risks. 37.What does a plumb line test check in a wall? Vertical alignment This test shows whether walls are straight or leaning. 38.What type of glass is recommended for windows near doors or floors for safety? Tempered glass Tempered glass shatters into small, less harmful pieces upon breakage.

39.Which component of a water heater prevents pressure buildup? Temperature and pressure relief valve This valve releases excess pressure and temperature to prevent explosions. 40.What is a common cause of uneven floors in older homes? Foundation settlement or joist issues Shifting foundations or damaged joists cause floor unevenness. 41.How is asbestos typically identified in a home inspection? By lab testing samples of suspect materials Visual inspection alone cannot confirm asbestos; lab analysis is needed. 42.What is the main function of a sump pump? To remove accumulated water from a basement or crawl space Sump pumps help prevent flooding by pumping water away. 43.What is the minimum height for a handrail on stairs? 34 inches Handrails between 34 and 38 inches are required for safety. 44.What is the effect of missing or damaged flashing around chimneys? Water infiltration and potential damage to the roof and walls Flashing directs water away; without it, leaks can occur. 45.What does an inspector use to test GFCI outlets? GFCI tester or built-in test button These tools verify the outlet’s ability to interrupt power during faults.

Discharging water too close to the foundation can cause soil erosion and water intrusion. 53.What is the typical diameter of a residential water main pipe? 3/4 inch to 1 inch Most residential water supply lines range within this diameter for adequate flow. 54.What is the primary concern when inspecting aluminum wiring? Increased risk of electrical fires due to oxidation and loose connections Aluminum wiring can expand and contract, loosening connections and causing heat buildup. 55.What should the inspector look for in the inspection of the HVAC condensate drain? Clear and unobstructed drainage away from the home Clogged condensate drains can cause water damage and mold growth. 56.Which type of foundation crack is typically a serious structural concern? Horizontal cracks Horizontal cracks can indicate pressure on the foundation walls and potential failure. 57.What is the minimum depth for frost protection of footings in Massachusetts? 42 inches Footings must be below the frost line to prevent damage from soil freezing and thawing.

58.What is the main purpose of an expansion tank in a closed-loop heating system? To absorb excess pressure from thermal expansion Expansion tanks prevent pressure buildup that could damage the system. 59.When inspecting a septic system, what is a key visual indicator of a problem? Standing water or soggy areas near the drain field These signs suggest the system is failing to properly disperse wastewater. 60.What does an AFCI breaker protect against? Arc faults that could cause electrical fires Arc Fault Circuit Interrupters detect dangerous electrical arcs and shut off power. 61.What is a common material used for vent pipes in plumbing systems? PVC or ABS plastic These materials are durable, corrosion-resistant, and easy to install. 62.How can an inspector check for proper attic insulation levels? Measure the depth of insulation and compare to local code requirements Adequate insulation thickness improves energy efficiency and comfort. 63.What is the recommended distance between the gas meter and electrical panels? At least 3 feet This distance minimizes risk of sparks igniting gas leaks.

71.What does a plumbing trap do? Prevents sewer gases from entering the home The water held in the trap acts as a seal against odors. 72.Which heating fuel is most common in Massachusetts homes? Natural gas Natural gas is widely available and efficient in the region. 73.What is the ideal location for the main electrical panel in a home? Near the point of utility connection, accessible, and dry This ensures easy access for service and maintenance. 74.What is the function of an egress window? To provide an emergency exit and ventilation Building codes require egress windows in bedrooms for safety. 75.What is the minimum height for a guardrail on balconies? 36 inches Consistent with deck guardrails to prevent falls. 76.What is the cause of “thermal bridging” in walls? Continuous framing members conducting heat through insulation Thermal bridging reduces the overall insulation effectiveness. 77.Which type of wood decay fungus is most common in homes? Brown rot Brown rot breaks down cellulose and causes wood to crumble.

78.How should an inspector check for leaks in plumbing fixtures? Visual inspection and running water to observe for drips Active testing reveals leaks not visible when fixtures are off. 79.What is the most common type of window in residential construction? Double-hung windows They are widely used due to ease of ventilation and cleaning. 80.What is the purpose of a drip edge on a roof? To direct water away from fascia and prevent wood rot Drip edges protect roof edges from water damage. 81.What is the common cause of efflorescence on masonry walls? Water migration dissolving salts, which then crystallize on the surface Efflorescence indicates moisture intrusion issues. 82.Which device protects a home from electrical surges? Surge protector It prevents damage from voltage spikes. 83.What is the minimum height for a handrail on stairs in Massachusetts? 34 inches This height ensures safety and compliance with building codes. 84.How do you identify lead paint in older homes? By using a lead paint test kit or certified inspector Lead paint requires special handling due to health risks.

92.What is the proper installation method for a sump pump discharge line? Directing water at least 10 feet away from the foundation This prevents water from flowing back toward the home. 93.What material is often used for older sewer lines that may now be problematic? Clay or cast iron pipes These materials degrade or crack over time. 94.What is the minimum width required for a residential staircase? 36 inches This width provides safe and comfortable passage. 95.What is the function of a fuse in an electrical system? To protect circuits by breaking the connection during overload Fuses prevent overheating and fires. 96.How can an inspector test a water heater’s T&P relief valve? By lifting the valve’s test lever and observing water discharge This ensures the valve operates properly to release pressure. 97.What is a common cause of drafty windows? Missing or damaged weatherstripping Proper seals prevent air infiltration. 98.How do you identify galvanized steel pipes? By their silver-gray metallic color and magnetic properties Galvanized pipes are prone to corrosion inside.

99.What is the typical thickness of asphalt driveway paving? 2 to 3 inches This thickness provides durability and resistance to cracking.

  1. What does the presence of mold typically indicate? Excess moisture or water intrusion Mold growth requires moisture, indicating potential leaks or humidity issues.
  2. What is the function of a chimney cap? To prevent rain, animals, and debris from entering the chimney Chimney caps protect flues and prevent blockages.
  3. Which part of a home’s foundation system transfers loads to the soil? Footings Footings spread structural loads to prevent settlement.
  4. What is the main hazard associated with knob-and-tube wiring? Lack of grounding and potential overheating This outdated wiring is a fire hazard and often fails inspection.
  5. What is the purpose of the main water shutoff valve? To stop water flow into the home in an emergency This valve allows quick response to leaks or plumbing repairs.
  6. What is a common sign of structural damage in walls? Large cracks wider than 1/4 inch Significant cracks may indicate foundation or framing problems.
  1. What type of vent pipe is required above a plumbing fixture? A vent pipe extending through the roof This prevents traps from being siphoned and maintains sewer gas pressure balance.
  2. What is the function of a sill sealer? To provide an air and moisture seal between the foundation and sill plate It helps prevent drafts and water intrusion.
  3. How can the inspector identify GFCI-protected outlets? By locating test and reset buttons on the outlet face GFCI outlets have built-in safety controls to prevent shock.
  4. What is the typical clearance required between a gas water heater and combustible materials? 6 inches Adequate clearance prevents fire hazards.
  5. What is the function of a pressure regulator on a gas line? To reduce incoming gas pressure to a safe level for appliances This protects appliances and piping systems.
  6. How can an inspector detect signs of water damage in ceilings? Stains, sagging, or peeling paint These indicate leaks or moisture intrusion.
  7. What is the purpose of attic baffles? To maintain airflow from soffit vents into the attic Baffles prevent insulation from blocking ventilation.
  1. What is the minimum headroom required for stairs in Massachusetts? 6 feet 8 inches Sufficient headroom prevents injury and complies with codes.
  2. Which window component allows the window to stay open at various heights? Balance system or window sash lock Balances hold the sash in position; locks secure the window.
  3. What is a common cause of cracked or damaged plaster walls? Building movement or settling Movement stresses plaster, causing cracks.
  4. What is the typical spacing for wall studs in residential framing? 16 inches on center This spacing provides structural support and accommodates drywall installation.
  5. What type of wiring is considered the safest and most modern? Copper wiring with grounding conductor Copper provides good conductivity and grounding for safety.
  6. What is the minimum clearance required between a wood-burning stove and combustible materials? 36 inches This distance prevents heat damage and fire risk.