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

DeVry University - WashingtonReal Estate Management

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

Typology: Exams

2024/2025

Available from 06/26/2025

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WASHINGTON HOME INSPECTOR
LICENSE EXAM QUESTIONS AND
CORRECT ANSWERS (VERIFIED
ANSWERS) PLUS RATIONALES 2025
1. What is the primary purpose of a home inspection?
To identify visible and accessible defects and safety issues in the property
• A home inspection focuses on visible, accessible components and systems to
inform the client about their condition. It is not a warranty or guarantee.
2. Which of the following is NOT typically included in a standard home
inspection?
Testing for radon gas
• Radon testing is usually a specialized service and not part of the standard
visual home inspection.
3. When inspecting the roof, what is the inspector primarily looking for?
Signs of damage such as missing shingles, leaks, or deterioration
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WASHINGTON HOME INSPECTOR

LICENSE EXAM QUESTIONS AND

CORRECT ANSWERS (VERIFIED

ANSWERS) PLUS RATIONALES 2025

  1. What is the primary purpose of a home inspection? To identify visible and accessible defects and safety issues in the property
  • A home inspection focuses on visible, accessible components and systems to inform the client about their condition. It is not a warranty or guarantee.
  1. Which of the following is NOT typically included in a standard home inspection? Testing for radon gas
  • Radon testing is usually a specialized service and not part of the standard visual home inspection.
  1. When inspecting the roof, what is the inspector primarily looking for? Signs of damage such as missing shingles, leaks, or deterioration
  • The inspector visually assesses roof condition, looking for defects that could lead to leaks or structural issues.
  1. What is the typical slope required for proper drainage away from a foundation? At least 6 inches of slope over the first 10 feet
  • Proper grading helps prevent water intrusion by directing runoff away from the foundation.
  1. What type of foundation crack usually indicates a structural problem? Horizontal cracks wider than 1/8 inch
  • Horizontal cracks often suggest serious pressure or movement and may require further evaluation by a structural engineer.
  1. How should an inspector test the operation of GFCI outlets? By using the built-in test button and checking if power cuts off
  • GFCI outlets have a test button to ensure they trip and protect against ground faults.
  1. What is the minimum height for guardrails on decks or balconies according to Washington State regulations? 36 inches
  • Guardrails must be at least 36 inches high to meet safety standards.
  1. Which of these heating systems requires inspection of fuel supply lines and combustion air? Furnace using natural gas or propane
  • Adequate ceiling height is required for living spaces to comply with building codes. 14.What is the main hazard associated with aluminum wiring? Increased risk of overheating and fire
  • Aluminum wiring can oxidize and loosen, potentially causing dangerous overheating. 15.What is the acceptable maximum gap between stair rail balusters? 4 inches
  • This prevents children from slipping through the gaps and reduces fall hazards. 16.Which type of insulation is commonly found in older homes and can pose health risks? Vermiculite containing asbestos
  • Some vermiculite insulation may contain asbestos, which is hazardous when disturbed. 17.What is a common defect in older clay sewer pipes? Cracks and root intrusion
  • Clay pipes are brittle and susceptible to cracking and roots infiltrating the joints. 18.Which of the following indicates a proper venting system for a gas appliance? Vents terminate above the roofline to prevent backdrafting
  • Proper venting ensures combustion gases are safely expelled outdoors. 19.What is the minimum thickness for drywall on garage ceilings in Washington? 5/8 inch
  • This thickness provides fire resistance as required by building codes. 20.Which window type is easiest to use for emergency escape and rescue? Casement window
  • Casement windows open fully outward, providing a larger escape opening. 21.What electrical service size is commonly found in most single-family homes? 100 to 200 amps
  • This range accommodates typical household electrical loads. 22.What is the minimum slope for a properly installed roof? 2:12 pitch (2 inches rise per 12 inches run)
  • This is generally the minimum slope to ensure proper water runoff. 23.What is the correct sequence when inspecting a chimney? Check the flue, damper, chimney cap, and exterior condition
  • This ensures safe venting and identifies damage or blockage. 24.What does the presence of efflorescence on basement walls usually indicate? Water intrusion and moisture migration through the foundation

31.What is the typical lifespan of asphalt shingles? 20 to 30 years

  • Shingles deteriorate over time due to weather exposure. 32.How is proper grading verified during a home inspection? By observing the slope of the soil away from the foundation
  • Proper grading directs water away and reduces foundation issues. 33.What is the standard electrical outlet spacing in residential rooms? Every 12 feet along walls
  • This ensures convenient access and code compliance. 34.What is the common cause of water heater leaks? Corrosion at the tank bottom or faulty pressure relief valve
  • Leaks indicate tank failure or valve issues needing immediate attention. 35.What is a typical sign of foundation settling? Cracks in drywall or uneven floors
  • These are indicators of possible movement in the foundation. 36.How can an inspector identify an improperly installed bathroom exhaust fan? Fan runs but does not vent outside
  • Bathroom fans must vent outdoors to remove moisture effectively. 37.What is the proper method for inspecting a crawlspace? Checking for moisture, pests, insulation, and structural integrity
  • Crawlspaces should be dry and free of damage or infestation. 38.What type of smoke detector is most common in residential homes? Photoelectric and ionization combination detectors
  • Combination detectors provide the broadest fire detection coverage. 39.What does a cracked heat exchanger in a furnace potentially release? Carbon monoxide gas
  • Cracked heat exchangers can leak deadly carbon monoxide into the home. 40.What is the minimum clearance between a gas meter and ignition sources? 3 feet
  • Maintaining clearance reduces fire or explosion risks. 41.Which type of window glass is required for safety in bathrooms and near floors? Tempered glass
  • Tempered glass breaks into small, less harmful pieces upon impact. 42.How is a moisture intrusion in a basement commonly identified? Musty odors and visible mold growth
  • These are classic signs of persistent moisture problems. 43.What does a GFCI outlet protect against? Electrical shock caused by ground faults
  • GFCIs quickly cut power to prevent shocks from faulty wiring or appliances. 44.What is the typical cause of spalling concrete on a porch or driveway?

51.Which of the following materials is commonly used for modern sewer piping? PVC (Polyvinyl Chloride)

  • PVC pipes are widely used today due to their durability, corrosion resistance, and ease of installation. 52.What is the minimum thickness required for a concrete slab in a garage? 4 inches
  • This thickness supports vehicle loads and prevents cracking. 53.What is the primary purpose of weep holes in brick veneer walls? To allow moisture to escape from behind the brick
  • Weep holes prevent water buildup that can cause damage behind the veneer. 54.How should an inspector evaluate the condition of wood siding? Look for rot, warping, cracks, and evidence of insect damage
  • These conditions affect durability and appearance of the siding. 55.What is the recommended spacing for floor joists in residential construction? 16 inches on center
  • This spacing provides adequate support for typical floor loads. 56.Which of these is a typical sign of electrical system overload? Frequent breaker trips or blown fuses
  • Repeated trips indicate circuits are carrying more current than designed for. 57.What type of roof flashing is used at valleys? Step flashing
  • Step flashing is installed at intersections like roof valleys to divert water. 58.When inspecting a chimney, what is the function of the damper? To control airflow and prevent heat loss when the fireplace is not in use
  • A damper closes to seal the chimney and opens to allow smoke to exit. 59.What is the best method for inspecting a septic system during a home inspection? Visual inspection of the tank, distribution box, and drain field if accessible
  • Septic systems require specialized inspections; visual checks are limited but useful. 60.What is a key sign of a failing HVAC condenser unit? Loud or unusual noises during operation
  • Abnormal sounds can indicate mechanical problems or motor failure. 61.How far should smoke detectors be placed from cooking appliances to avoid false alarms? At least 10 feet away
  • This distance helps prevent nuisance alarms from cooking smoke or steam. 62.What is the acceptable maximum length for a flexible gas connector? 3 feet

Roof or plumbing leaks above the area

  • Stains show water intrusion that should be investigated promptly. 70.Which material is commonly used for electrical wiring in homes built after 1970? Copper wiring
  • Copper is preferred due to its conductivity and reliability. 71.How should an inspector check for asbestos-containing materials? Visual identification and recommending professional testing if suspected
  • Inspectors should not sample asbestos but note possible presence and recommend experts. 72.What is the minimum height for a guardrail on stairs in Washington? 34 inches
  • This is the minimum height to prevent falls on stairways. 73.What is a typical defect of older knob-and-tube wiring? Lack of grounding and potential insulation deterioration
  • This wiring is outdated and poses safety risks. 74.How can an inspector identify improper drainage at the foundation? Pooling water near the foundation or soil sloping toward the structure
  • Water should flow away to avoid foundation damage. 75.What is the minimum clearance required around a furnace for service access?

30 inches

  • Adequate clearance allows safe and efficient maintenance. 76.What is a common cause of drywall cracks near windows? Structural movement or improper installation
  • Differential movement causes stress and cracking around openings. 77.How is proper attic insulation verified during inspection? By measuring thickness and type of insulation material
  • Sufficient insulation helps maintain energy efficiency. 78.What type of window glazing provides the best energy efficiency? Double-pane insulated glass
  • Double glazing reduces heat transfer and improves comfort. 79.What is the function of a backflow preventer in plumbing systems? To prevent contaminated water from flowing back into the potable water supply
  • Backflow preventers maintain water quality and safety. 80.What does the presence of cracked or missing mortar in a chimney indicate? Potential for water penetration and structural issues
  • Damaged mortar allows water infiltration and weakens masonry. 81.What is the typical cause of uneven floors in older homes? Foundation settling or joist damage

12 to 18 inches

  • Depth varies by climate but protects pipes from freezing. 88.What is the purpose of a pressure relief valve on a water heater? To release excess pressure and prevent tank rupture
  • This is a critical safety device for water heaters. 89.What is a common indicator of electrical arcing in wiring? Burn marks or melting on wires or outlets
  • Arcing creates heat and can cause fires. 90.What is the minimum size required for an emergency escape window? 5.7 square feet of net clear opening
  • This size allows safe exit or entry by emergency personnel. 91.Which of these is NOT part of the home's drainage system? Gas lines
  • Gas lines supply fuel and are not involved in water drainage. 92.What is the common cause of cracked plaster walls? Settlement, moisture, or impact damage
  • Plaster can crack from movement or water intrusion. 93.What is the correct sequence for inspecting a septic tank? Locate, open lid, check liquid level, inspect inlet and outlet pipes
  • This provides basic info on system operation and condition.

94.What is the function of a vent stack in plumbing? To allow sewer gases to escape and maintain proper drainage flow

  • Vent stacks prevent pressure buildup in waste pipes. 95.What type of insulation is considered environmentally friendly and often made from recycled materials? Cellulose insulation
  • Made from recycled paper, cellulose is sustainable and effective. 96.What is the typical cause of efflorescence on masonry? Water movement through the masonry dissolving and depositing salts
  • Efflorescence is a sign of moisture migration. 97.How can an inspector check for asbestos siding? Visually identify and recommend testing by specialists if suspected
  • Asbestos should not be disturbed during inspection. 98.What is the purpose of a thermal barrier in attic insulation? To separate insulation from living spaces and reduce fire risk
  • Thermal barriers protect occupants and comply with code. 99.What is the proper method for inspecting a crawlspace vapor barrier? Verify continuous plastic sheet covering ground without tears
  • A proper vapor barrier reduces moisture infiltration.
  1. What is a common defect in older homes with clay tile roofs? Cracked or broken tiles leading to leaks

1/4 inch per foot toward the drain

  • This ensures effective drainage and prevents standing water.
  1. What should be inspected in a home’s exterior grading? Slope away from foundation and absence of low spots
  • Proper grading prevents water intrusion and foundation damage.
  1. What is the typical cause of water heater pilot light failure? Dirty or clogged pilot orifice
  • Cleaning restores proper ignition.
  1. What type of wood is most resistant to decay? Cedar and redwood
  • These woods contain natural oils that resist rot.
  1. What is the recommended maximum spacing for deck boards? 1/8 inch gap to allow drainage
  • Gaps prevent water pooling and wood damage.
  1. What is a common cause of garage door failure? Broken springs or cables
  • These components bear the door’s weight and are prone to wear.
  1. Which device prevents reverse flow in a sprinkler system? Check valve
  • Check valves maintain pressure and prevent contamination.
  1. What does a spalling concrete driveway look like? Flaking and surface chipping
  • Caused by freeze-thaw cycles or poor concrete mix.
  1. What is a common cause of cracked foundation walls? Hydrostatic pressure from soil moisture
  • Water pressure can cause cracking and structural damage.
  1. What is the primary purpose of an attic insulation baffle? To maintain airflow from soffit vents into the attic
  • Baffles prevent insulation from blocking ventilation.
  1. What is a sign of malfunctioning plumbing vent pipes? Gurgling sounds in drains
  • Blocked vents cause improper drainage and noise.
  1. How should an inspector check for HVAC refrigerant leaks? Visual inspection and noting performance issues; specialized tools recommended
  • Leaks require professional detection and repair.
  1. What is a common cause of hot water odors? Bacterial growth in water heater
  • Flushing and sanitizing may be needed.
  1. What is the minimum width required for a residential hallway? 36 inches