INTERNACHI HOME INSPECTION MASTER EXAM PREP, Exams of Entomology

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EXAM PREPARATION GUIDE

INTERNACHI HOME INSPECTION MASTER EXAM PREP

CERTIFICATION REVIEW GUIDE

2026 EDITION

PRACTICE QUESTIONS

MODEL ANSWERS

EXAM REVIEW MATERIALS

INTERNACHI HOME INSPECTOR –

1 EXAM QUESTIONS AND

ANSWERS 100% PASS

The upper edge of a masonry chimney cleanout should be at least inches below the lowest inlet opening. - ANSWER✔✔- The minimum slope for a composition-shingle roof is. - ANSWER✔✔-2: Wood rot may be found when the wood's moisture content is above. - ANSWER✔✔-20% InterNACHI estimates that of the 45 million existing decks, only are completely safe. - ANSWER✔✔-40% InterNACHI estimates that of the 45 million existing decks, only are completely safe. - ANSWER✔✔-40% Many builders use common "1/2-inch wood sheathing, which has an R-value of.

• ANSWER✔✔-0. The U.S. government has established a minimum rating for furnaces of. - ANSWER✔✔-78%

INTERNACHI HOME INSPECTION MASTER EXAM PREP

2026 EDITION

An attic with an area of 600 square feet with ridge and soffit vents should have a total vent area of square feet - ANSWER✔✔- A clearance gap of inches is required between a manufactured chimney and combustibles - ANSWER✔✔- If a roof ridge is closer than 10 feet to a chimney, the stack should be feet higher - ANSWER✔✔- An attic with an area of 600 square feet with ridge and soffit vents should have a total vent area of square feet - ANSWER✔✔- A clearance gap of inches is required between a manufactured chimney and combustibles - ANSWER✔✔- If a roof ridge is closer than 10 feet to a chimney, the stack should be feet higher - ANSWER✔✔- A proper chimney crown should be constructed of a Portland cement-based mixture and cast or formed so that it provides an overhang projecting beyond all sides of the chimney by a minimum of inches. - ANSWER✔✔- House framing components should be at least inches away from the chimney wall

• ANSWER✔✔-

A proper masonry chimney cap should be constructed of a Portland cement-based mixture and cast or formed so it provides an overhang projecting beyond all sides of the chimney by a minimum of inches - ANSWER✔✔- House framing components should be at least inches away from the chimney wall

• ANSWER✔✔- A proper masonry chimney cap should be constructed of a Portland cement-based mixture and cast or formed so it provides an overhang projecting beyond all sides of the chimney by a minimum of inches - ANSWER✔✔- Felt underlayment on tile roofs with a pitch between 3:12 and 4:12 should have a minimum -inch headlap. - ANSWER✔✔- Felt underlayment on tile roofs with a pitch of 4:12 or greater should have a minimum -inch headlap. - ANSWER✔✔- Felt underlayment on tile roofs with a pitch of 4:12 or greater should have a minimum -inch headlap - ANSWER✔✔- Open electrical service conductors and multi-conductor cables that are not installed in a raceway or provided with an approved overall outer jacket should have a clearance of at least feet from the sides of doors, porches, decks, stairs, ladders, fire escapes and balconies, and from the sides and bottoms of operable windows. - ANSWER✔✔- The minimum height of a masonry chimney should be feet. - ANSWER✔✔-

Plywood and OSB can leave the production line with a moisture content as low as %. - ANSWER✔✔- Asphalt shingles are rated for impact resistance by classes 1 through 4 with class shingles having the highest resistance. - ANSWER✔✔- Woven valleys should never be installed on a roof with a pitch of less than :12 - ANSWER✔✔- Guardrail infill should not permit a -inch sphere to pass through. - ANSWER✔✔- Any stairway of or more risers should have a handrail on at least one side. - ANSWER✔✔- In this course, we learned that a minimum riser height is inches. - ANSWER✔✔- Horizontal guards at raised floor areas, balconies and porches should have intermediate rails or ornamental enclosures that do not allow passage of a -inch diameter sphere.

• ANSWER✔✔- The flue liner tile should project above the crown a minimum of inches. - ANSWER✔✔- The horizontal spacing for supporting pipe made of cast iron should be a maximum of feet. - ANSWER✔✔- The National Fire Protection Agency (NFPA) recommends that fire extinguishers be tested every or 12 years, depending on the class/type. - ANSWER✔✔-

An open vent pipe that passes through a roof should extend at least inches above the roof. - ANSWER✔✔- If snow accumulation is expected at various times, then the vent height should be increased so that the vent pipe will be at least inches above the anticipated accumulation. - ANSWER✔✔- The upper edge of a masonry chimney cleanout should be at least inches below the lowest inlet opening. - ANSWER✔✔- An open vent pipe that passes through a roof should extend at least inches above the roof. - ANSWER✔✔- High-wind fastening patterns for most shingles require fasteners - ANSWER✔✔- 6 The triangular area formed by a tread, riser and guard should not allow passage of a -inch diameter sphere. - ANSWER✔✔- Interior stairways with at least risers require wall switches at each floor level, unless the lights are continuously illuminated or automatically controlled. - ANSWER✔✔- The electrical supply should be able to be shut down using no more than moves of the hand. - ANSWER✔✔- Decks greater than feet above grade should have diagonal bracing from posts to girder, and from posts to joists. - ANSWER✔✔-

The anti-siphon hole in a dip tube of a water heater tank is required to be located within inches of the top of the tank. - ANSWER✔✔- If a roof is used for a purpose other than weather protection, the vent extensions should extend above the roof by at least feet. - ANSWER✔✔- Foundation anchor bolts should extend at least inches into masonry or concrete. - ANSWER✔✔- Foundation anchor bolts should extend at least inches into masonry or concrete. - ANSWER✔✔- If a roof is used for a purpose other than weather protection, the vent extensions should extend above the roof by at least feet. - ANSWER✔✔- The horizontal area of the window well of the emergency escape and rescue opening should be at least square feet. - ANSWER✔✔- Window wells at emergency escape and rescue openings should have a horizontal area of at least square feet. - ANSWER✔✔- In relation to emergency escape and rescue openings, the horizontal area of a window well should be at least square feet. - ANSWER✔✔- For service-drop cables supported on and cabled together with a grounded bare messenger wire, the vertical clearance should be at least feet at the electrical service entrance to buildings, at the lowest point of the drip loop of the building's

electrical entrance, and above areas and sidewalks accessed only by pedestrians. - ANSWER✔✔- For service-drop cables supported on and cabled together with a grounded bare messenger wire, the vertical clearance should be at least feet at the electrical service entrance to buildings, at the lowest point of the drip loop of the building's electrical entrance, and above areas and sidewalks accessed only by pedestrians. - ANSWER✔✔- The orange-colored cable observed inside the panel identified a -gauge wire. - ANSWER✔✔- For winder stairs, treads should have a depth of at least inches measured at a point 12 inches from the narrower edge. - ANSWER✔✔- Freeze thaw can exert 3000 lbs per square foot of pressure laterally on a foundation wall, but hydrostatic pressure can exert times that force. - ANSWER✔✔- The minimum tread depth for stairs is inches. - ANSWER✔✔- The minimum tread depth for a standard stair is inches. - ANSWER✔✔- The vertical clearance from open electric service conductors should be at least feet over residential properties. - ANSWER✔✔- The vertical clearance of the service drop should be at least feet above the grounds of a residential property. - ANSWER✔✔-

Untreated joists should be at least inches above the ground. - ANSWER✔✔- A hot water tank with an open source of ignition should be elevated not less than inches (457 mm) above the floor of a garage. - ANSWER✔✔- Modern standards call underlayment beneath asphalt shingles on roof slopes between 2&12 and 4&12 to overlap horizontally a minimum of inches. - ANSWER✔✔- Decay of common wood framing materials can begin when the moisture content of untreated wood exceeds %. - ANSWER✔✔- Wood that has a moisture content of less than % burns hotter and cleaner than freshly cut wood. - ANSWER✔✔- Wood that has a moisture content of less than % burns hotter and cleaner than freshly cut wood - ANSWER✔✔- Wood that has a moisture content of less than % burns hotter and cleaner than freshly cut wood - ANSWER✔✔- When roof pitches exceed &12, the weight of the shingle alone may not be enough to fully bond the adhesive strips. - ANSWER✔✔- The vertical distance from a fixture outlet to the trap weir should not be more than inches. - ANSWER✔✔- Mike recommends giving the client the inspection agreement/contract at least hours prior to the inspection. - ANSWER✔✔-

Retaining walls that are taller than inches and not laterally supported at the top should be designed to ensure stability against overturning, sliding, excessive foundation pressure, and water uplift. - ANSWER✔✔- Metal valley flashing should be a minimum of inches wide - ANSWER✔✔- Metal valley flashing should be a minimum of inches wide - ANSWER✔✔- A suitable access opening, passageway, and work space is required when a water heater is installed in an attic. The passageway should have continuous solid flooring not less than inches (610 mm) wide. - ANSWER✔✔- The maximum length of a clothes dryer exhaust duct should be no longer than feet from the dryer's location to the wall or roof termination. - ANSWER✔✔- The maximum length of a clothes dryer exhaust duct should be no longer than feet from the dryer's location to the wall or roof termination. - ANSWER✔✔- If a panelboard is wider than inches, the workspace in front of it must extend the full width. - ANSWER✔✔- The horizontal distance from the fixture outlet to the trap weir should not be greater than inches measured from the centerline of the fixture outlet to the centerline of the inlet of the trap. - ANSWER✔✔- The outlet of a laundry tray should be no farther than inches horizontally from the standpipe trap. - ANSWER✔✔-

The minimum height of a horizontal guard is inches. - ANSWER✔✔- Every landing should be at least inches measured in the direction of travel. - ANSWER✔✔- The size of standard roll roofing is inches wide - ANSWER✔✔- The size of standard roll roofing is inches wide - ANSWER✔✔- According to the DOE, the minimum R-value for a ceiling in a home located in Zone 2 is

. - ANSWER✔✔- The rule of thumb for downspouts is at least one downspout for each feet of gutter. - ANSWER✔✔- The sill height of an emergency escape and rescue opening should be no higher than inches above the floor. - ANSWER✔✔- The sill height of an emergency escape and rescue opening should be no higher than inches above the floor. - ANSWER✔✔- A window used for emergency escape and rescue should have a sill height of not more than inches above the floor. - ANSWER✔✔- According to the DOE, the minimum R-value for a ceiling in a home located in Zone 5 is . - ANSWER✔✔-

According to the DOE, the minimum R-value for a ceiling in a home located in Zone 5 is

. - ANSWER✔✔- Intermediate rails or balusters should be able to withstand a horizontal load of pounds on an area equal to one square foot. - ANSWER✔✔- Intermediate rails or balusters should be able to withstand a horizontal load of pounds on an area equal to 1 square foot. - ANSWER✔✔- Three-tab asphalt shingles are typically resistant to winds of up to MPH. - ANSWER✔✔- Properly installed, stapled 3-tab shingles will usually withstand wind speeds of up to MPH. - ANSWER✔✔- One cubic foot of water at 68° F weighs about pounds. - ANSWER✔✔- One cubic foot of water at 68° F weighs about pounds. - ANSWER✔✔- An asphalt shingle is the most resistant to wind when the wind is blowing at a? angle to the length of the shingle. - ANSWER✔✔- About % of the decks collapses occurred as a result of the separation of the house and deck ledger board. - ANSWER✔✔- A minimum service of amps is required for a single residential dwelling unit. - ANSWER✔✔-

Basements used for mechanical equipment only and not larger than square feet need not have an emergency escape and rescue opening. - ANSWER✔✔- The design strength of a guard should resist a -pound concentrated load applied at any point in any direction along the handrail. - ANSWER✔✔- Combination temperature and pressure relief valves open and release water out of the tank if the temperature exceeds degrees F. - ANSWER✔✔- The minimum concentrated load on stair treads (on an area of 4 square inches) is pounds. - ANSWER✔✔- Heavy asphalt shingles with multiple layers may weigh close to lbs. per square - ANSWER✔✔- Because of leverage, a 200-pound force pushing the deck's guardrail outward causes a -pound force at the upper bolt attaching the post. - ANSWER✔✔-1, Because of leverage, a 200-pound force pushing the deck's guardrail outward causes a -pound force at the upper bolt attaching the post. - ANSWER✔✔-1, Knob-and-tube wiring was the common method used to wire homes in the United States prior to. - ANSWER✔✔- Knob-and-tube wiring was the common method used to wire homes in the United States prior to. - ANSWER✔✔-

Knob-and-tube wiring was the common method used to wire homes in the United States prior to. - ANSWER✔✔- The use of air conditioning or simple cooling of the air became widespread after

. - ANSWER✔✔- The manufacture of lead paint for residential use was banned in by the U.S. Consumer Product Safety Commission. - ANSWER✔✔- Federal law in the U.S. requires that residential garage door openers manufactured after must be equipped with photo-electric eyes or some other auto-reverse safety feature. - ANSWER✔✔- Four-wire 240V circuits were commonly required starting in. - ANSWER✔✔- Manufacture of T-lock shingles ended in _. - ANSWER✔✔- Freeze thaw can exert lbs per square foot of pressure laterally on the foundation walls. - ANSWER✔✔-3, Hydrostatic pressure can exert lbs of pressure. - ANSWER✔✔-30, If the service or feeder rating in amps is 200, then the aluminum AWG size should be . - ANSWER✔✔-Apr- If the service or feeder rating in amps is 200, then the aluminum AWG size should be . - ANSWER✔✔-Apr-