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NEW JERSEY HOME INSPECTOR LICENSE EXAM
QUESTIONS AND CORRECT ANSWERS (VERIFIED
ANSWERS) Q&A 2026|INSTANT DOWNLOAD PDF
1. Which is the primary purpose of a home inspection? A. Determine property value B. Identify material defects and safety issues C. Approve building permits D. Certify structural engineering compliance Rationale: Home inspections focus on observable defects and safety concerns. Correct Answer: B 2. Which component is MOST critical in preventing roof leaks? A. Paint coating B. Flashing C. Ceiling joists D. Ridge vent Rationale: Flashing seals joints and penetrations. Correct Answer: B 3. What is the function of a foundation footing? A. Support roof loads B. Distribute building weight to soil C. Provide insulation D. Support electrical wiring Rationale: Footings spread structural load. Correct Answer: B
4. Which tool is commonly used to detect moisture intrusion? A. Voltmeter B. Moisture meter C. Manometer D. Tachometer Rationale: Moisture meters measure water content. Correct Answer: B 5. A GFCI outlet is designed to protect against: A. Power surges B. Electrical shock C. Overheating wires D. Voltage drops Rationale: GFCIs cut power when imbalance is detected. Correct Answer: B 6. What is the minimum slope recommended for most asphalt roofs? A. 1: B. 2: C. 4: D. 6: Rationale: Asphalt shingles require sufficient drainage slope. Correct Answer: C 7. Which system controls indoor air humidity? A. Electrical panel B. HVAC system C. Plumbing system
11. The main purpose of attic ventilation is to: A. Increase heating B. Reduce moisture and heat buildup C. Strengthen rafters D. Improve plumbing flow Rationale: Ventilation prevents condensation damage. Correct Answer: B 12. Which issue is MOST associated with poor grading around a house? A. Roof collapse B. Water intrusion in foundation C. Electrical failure D. HVAC malfunction Rationale: Improper slope directs water toward structure. Correct Answer: B 13. A breaker panel is used to: A. Store electricity B. Distribute and protect electrical circuits C. Generate power D. Cool appliances Rationale: Breakers prevent overload damage. Correct Answer: B 14. Which HVAC component circulates air throughout the home? A. Compressor B. Furnace
C. Blower fan D. Condenser coil Rationale: Blower moves conditioned air. Correct Answer: C
15. What does efflorescence on walls indicate? A. Electrical issue B. Water migration through masonry C. Paint failure only D. Roof leak only Rationale: Salt deposits form from moisture movement. Correct Answer: B 16. What is the most common cause of drywall cracking? A. Electrical surge B. Structural settlement C. Plumbing pressure D. Roof ventilation Rationale: Movement in the structure causes joint stress. Correct Answer: B 17. Which electrical condition is considered unsafe? A. Grounded outlet B. Double-tapped breaker C. AFCI protection D. GFCI outlet Rationale: Two wires on one breaker terminal can overheat. Correct Answer: B
D. Lead Rationale: PVC is lightweight and corrosion resistant. Correct Answer: C
22. Hollow-sounding wood is a sign of: A. Mold only B. Termite damage C. Proper sealing D. Electrical fault Rationale: Termites consume wood internally. Correct Answer: B 23. Mold growth is primarily caused by: A. Electrical issues B. Moisture accumulation C. Low voltage D. Structural steel Rationale: Mold thrives in damp conditions. Correct Answer: B 24. The chimney flue is responsible for: A. Cooling air B. Venting combustion gases C. Water drainage D. Electrical grounding Rationale: It safely removes exhaust gases. Correct Answer: B 25. The water heater safety device is called: A. Shutoff valve
B. Float switch C. Pressure regulator D. Temperature-pressure relief valve Rationale: It prevents explosion from excess pressure. Correct Answer: D
26. Building codes primarily establish: A. Property value B. Minimum safety standards C. Design aesthetics D. Insurance rates Rationale: Codes ensure safety and compliance. Correct Answer: B 27. Roof rafters are used to: A. Support flooring B. Support roof load C. Carry plumbing D. Hold insulation Rationale: Rafters form roof structure. Correct Answer: B 28. Flashing is installed around: A. Electrical outlets B. Roof penetrations C. Flooring joints D. Doors only
32. Sewer gas smell in a home usually indicates: A. Electrical failure B. Broken trap seal C. Roof leak D. HVAC issue Rationale: Dry or broken traps allow gas entry. Correct Answer: B 33. A load-bearing wall is designed to: A. Divide rooms only B. Support structural loads C. Hold insulation D. Carry wiring Rationale: It transfers weight to foundation. Correct Answer: B 34. A non-load-bearing wall is used for: A. Structural support B. Room division only C. Roof support D. Foundation support Rationale: It does not carry structural load. Correct Answer: B 35. The main breaker controls: A. Water supply B. Entire electrical system C. Gas flow D. HVAC system
Rationale: It disconnects all power. Correct Answer: B
36. Roof flashing is typically made of: A. Wood B. Metal C. Plastic foam D. Concrete Rationale: Metal resists water penetration. Correct Answer: B 37. Gutters are designed to: A. Heat water B. Direct rainwater away C. Store rainwater D. Strengthen roof edges Rationale: Prevent water damage. Correct Answer: B 38. AFCI breakers protect against: A. Water leaks B. Arc faults C. Gas leaks D. Voltage drops Rationale: Prevents electrical fires. Correct Answer: B
D. Support roof Rationale: Protects basement walls. Correct Answer: B
43. Ceiling joists primarily support: A. Plumbing B. Ceiling and attic loads C. Electrical panels D. HVAC units Rationale: They distribute ceiling loads. Correct Answer: B 44. Handrails are installed for: A. Decoration B. Safety support C. Structural load D. Electrical grounding Rationale: Prevents falls. Correct Answer: B 45. Insulation helps to: A. Increase noise B. Reduce heat transfer C. Conduct electricity D. Increase moisture Rationale: Improves energy efficiency. Correct Answer: B
46. Electrical overload occurs when: A. Voltage drops B. Current exceeds capacity C. Water enters panel D. Airflow increases Rationale: Excess current causes heat. Correct Answer: B 47. Plumbing vent systems are used to: A. Heat water B. Balance air pressure C. Increase pressure D. Filter water Rationale: Ensures smooth drainage. Correct Answer: B 48. Window flashing prevents: A. Electrical failure B. Water intrusion C. Heat loss D. Structural movement Rationale: Seals window openings. Correct Answer: B 49. A furnace is used to: A. Cool air B. Heat air C. Filter water D. Pump gas
53. Roof ridge is the: A. Drain point B. Peak intersection C. Base layer D. Insulation layer Rationale: Top roof meeting line. Correct Answer: B 54. Basement moisture is often caused by: A. Electrical surge B. Poor drainage C. HVAC cooling D. Roof design Rationale: Water seepage from ground. Correct Answer: B 55. Sediment in water heaters causes: A. Cooling B. Efficiency loss C. Wiring issues D. Structural damage Rationale: Reduces heating performance. Correct Answer: B 56. A short circuit usually results in: A. Increased voltage B. Breaker trip C. Pipe leak
D. Roof damage Rationale: Safety mechanism activates. Correct Answer: B
57. Water stains typically indicate: A. Electrical surge B. Plumbing leak C. HVAC issue D. Structural steel Rationale: Moisture intrusion visible. Correct Answer: B 58. Thermostat controls: A. Plumbing B. Temperature C. Electricity only D. Structural load Rationale: Regulates HVAC system. Correct Answer: B 59. Horizontal foundation cracks are usually: A. Cosmetic B. Serious structural concern C. Electrical issue D. HVAC problem Rationale: Indicate pressure failure. Correct Answer: B 60. Roof underlayment serves as: A. Decorative layer
C. Increased water pressure D. Roof leaks Rationale: Excess load causes breaker activation. Correct Answer: B
64. Attic insulation primarily improves: A. Structural strength B. Energy efficiency C. Plumbing flow D. Electrical grounding Rationale: Reduces heat loss/gain. Correct Answer: B 65. A plumbing shutoff valve is used to: A. Increase pressure B. Stop water flow C. Heat water D. Filter water Rationale: Allows system isolation. Correct Answer: B 66. The HVAC compressor is responsible for: A. Air distribution B. Refrigerant pressurization C. Heating water
D. Electrical grounding Rationale: Moves refrigerant through system. Correct Answer: B
67. A structural column primarily supports: A. Horizontal loads B. Vertical loads C. Electrical wiring D. Plumbing pipes Rationale: Transfers weight downward. Correct Answer: B 68. Roof sagging is usually a sign of: A. Cosmetic damage B. Structural weakness C. Electrical failure D. Plumbing blockage Rationale: Indicates compromised framing. Correct Answer: B 69. Mold exposure is most likely to cause: A. Electrical failure B. Respiratory problems C. Roof leaks D. Plumbing corrosion
