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CONNECTICUT HOME INSPECTOR LICENSE EXAM QUESTIONS AND CORRECT ANSWERS (VERIFIED ANSWERS) PLUS RATIONALES 2025
Typology: Exams
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17.Which structural component supports the roof load in a typical wood- framed house? Rafters or trusses Rafters and trusses distribute roof loads to the walls and foundation. 18.What is a common sign of foundation settlement? Cracks in interior drywall or exterior masonry Settlement can cause stress cracks in walls and foundations. 19.What is the purpose of a vapor barrier in a crawl space? To prevent moisture from the soil entering the crawl space This reduces mold growth and wood rot. 20.What is the minimum height of basement egress windows? 24 inches Basement egress windows must allow emergency escape. 21.Which type of heating system uses a boiler and radiators? Hydronic heating system Hot water is circulated through radiators to heat the home. 22.What is the typical diameter of a main sewer line from a house? 4 inches A 4-inch pipe is standard for most residential sewer lines. 23.What is the purpose of flashing around chimneys and roof penetrations? To prevent water penetration Flashing directs water away from vulnerable roof areas.
24.What does AFCI stand for in electrical systems? Arc Fault Circuit Interrupter AFCIs detect electrical arcs and shut off power to prevent fires. 25.When inspecting a crawl space, what is a major health concern to note? Presence of mold or standing water These conditions can lead to structural damage and health risks. 26.Which type of insulation is sprayed as a foam? Spray foam insulation Spray foam expands to fill gaps, providing good air sealing. 27.What is a common cause of basement flooding? Improper grading and poor drainage Water pooling near foundations can seep into basements. 28.What should be inspected on a home's septic system during an inspection? Visible components such as the tank and drain field for signs of failure A home inspector may only visually inspect septic components unless licensed otherwise. 29.What is the typical thickness of drywall in residential walls? 1/2 inch Standard drywall thickness for interior walls. 30.How can an inspector detect improper ventilation in an attic? Presence of moisture, mold, or damaged insulation Poor ventilation leads to moisture buildup and damage.
38.What does a home inspector typically NOT do? Perform invasive testing Home inspections are visual and non-invasive unless otherwise agreed. 39.Which system uses ducts to distribute heated air? Forced air heating system Forced air systems use ducts and fans to circulate warm air. 40.What is a common sign of termite damage? Hollow-sounding wood and mud tubes Termites eat wood internally and leave mud tubes for travel. 41.What is the function of a sump pump? To remove water from basements or crawl spaces Sump pumps help prevent flooding by pumping out accumulated water. 42.Which is a safe practice when inspecting a home’s roof? Use proper fall protection and avoid inspections during wet conditions Safety is critical to prevent falls and injuries. 43.What type of wiring is most common in homes built after 1960? Non-metallic sheathed cable (NM cable or Romex) NM cable is the standard residential wiring. 44.How should an inspector check for proper grading around a home? Ensure ground slopes away from the foundation at least 6 inches over 10 feet Proper grading directs water away from the foundation.
45.What does a moisture meter measure? The level of moisture in building materials This helps detect hidden water damage. 46.What is the primary concern with aluminum wiring? Higher risk of electrical fires due to oxidation and loosening connections Aluminum wiring requires special connectors and monitoring. 47.Which of these is NOT a typical sign of roof leaks? Peeling paint on exterior walls Peeling paint is more often related to exterior moisture, not roof leaks. 48.What is the minimum height required for handrails on stairs? 34 to 38 inches Handrails must be between these heights for safety and code compliance. 49.What is the typical thickness of concrete slabs in residential floors? 4 inches This thickness provides adequate strength for floors. 50.Why is it important for home inspectors to document findings thoroughly? To provide clear evidence and recommendations for clients Accurate documentation protects both the client and inspector legally. 51.What is the primary purpose of a GFCI outlet? To protect people from electrical shock by shutting off power during a ground fault
58.Which type of window glass is required for safety glazing in doors and bathrooms? Tempered glass Tempered glass breaks into small, less harmful pieces when shattered. 59.What is the minimum distance required between a wood stove and combustible materials? 36 inches This clearance helps prevent fires. 60.What does the term “kickout flashing” mean? A flashing that directs water away from the intersection of a roof and wall It prevents water from entering behind siding or roofing materials. 61.What is the minimum slope for a roof to be considered “low slope”? 2:12 (vertical to horizontal) Roofs with slopes less than this require special materials and installation. 62.What is a common defect found in homes with aluminum wiring? Oxidation causing loose connections and potential fire hazard Aluminum wiring can oxidize and expand, loosening connections. 63.When inspecting a home's plumbing, what does a “water hammer” refer to? A loud banging noise caused by sudden water flow stoppage Water hammer can damage pipes and fixtures. 64.What is the typical thickness of insulation recommended for basement walls?
1 to 1.5 inches rigid foam insulation This thickness helps reduce heat loss and moisture intrusion. 65.Which type of electrical wiring is considered outdated and potentially unsafe? Knob-and-tube wiring Knob-and-tube lacks grounding and is prone to deterioration. 66.What type of foundation wall crack is generally considered serious? Horizontal cracks wider than 1/8 inch Horizontal cracks often indicate structural movement or pressure. 67.What is the recommended minimum height for kitchen countertops? 36 inches This height provides ergonomic work surfaces for most users. 68.Which component prevents backflow of water into the public water supply? Backflow preventer valve It protects potable water from contamination. 69.What is the purpose of a vapor barrier installed under a concrete slab? To prevent moisture migration from the ground into the slab Moisture barriers protect floors and reduce mold risk. 70.What is the correct term for the vertical support in a stair railing? Baluster Balusters provide support and safety for stair railings.
78.What is the primary cause of wood rot? Moisture intrusion Fungal decay occurs when wood remains wet for extended periods. 79.What tool is best for detecting leaks in plumbing supply lines? Pressure gauge or moisture meter Pressure gauges detect pressure drops; moisture meters identify wet areas. 80.Which heating system component controls temperature by turning the system on and off? Thermostat The thermostat senses temperature and controls heating cycles. 81.How often should smoke detectors be tested? At least once a month Regular testing ensures proper operation and safety. 82.What is the function of weep screed in stucco walls? To allow moisture to drain from behind the stucco Weep screeds prevent moisture buildup and damage. 83.What is the minimum height for a stair riser in residential construction? 4 inches Risers should not be less than this to ensure safety and comfort. 84.Which of the following roofing materials has the longest expected lifespan? Metal roofing Metal roofs can last 40 to 70 years with proper maintenance.
85.What is a typical cause of mold growth in basements? Excess humidity and water intrusion Moisture provides ideal conditions for mold. 86.Which pipe material is commonly used for sewer lines? PVC (polyvinyl chloride) PVC is durable, resistant to corrosion, and widely used. 87.What is the function of a check valve in plumbing? To prevent backflow of water in piping Check valves allow flow in one direction only. 88.Which electrical component is designed to protect wiring from overheating? Circuit breaker Breakers interrupt power flow if current exceeds safe limits. 89.What is the typical clearance needed around a water heater for maintenance? At least 30 inches in front Adequate clearance allows safe servicing. 90.What should an inspector do if they find active termite infestation? Recommend a licensed pest control specialist for treatment Treating termites requires specialized knowledge and equipment. 91.What is the function of a plenum in an HVAC system? To distribute conditioned air from the furnace or air handler The plenum is the main air distribution box.
99.What is the typical depth of frost line in Connecticut? Approximately 42 inches Foundations must extend below frost line to prevent heaving.