Home Inspection Questions and Answers: A Comprehensive Guide, Exams of Engineering

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InterNACHI 2024-2025. Questions and

Answers. Graded A

• ANS A hole may be bored no closer than _____ from the top or bottom of a joist. a. 2 inches b. 1 inch c. 4 inches d. 6 inches
  • ANSStep flashing should have a minimum horizontal projection of ____ inches. a. 2 b. 3 c. 6 d. 4 e. 12 44" - ANSwindows max height from the floor 7-3/4" - ANSMax riser height a 17-1/2 - ANSA dryer vent with a 45- and 90-degree elbow should have a maximum length of _____ feet. a 17-1/ b 16

c 14-1/ d 10 a false - ANSPower venters are never allowed on conventional oil furnaces. a False b True a true - ANSA common failure mode for asphalt shingles is loss of granular material. a True b False a with a work space having a width of less than 30 inches - ANSA forced-air furnace ____________ describes an incorrect installation. a with a work space having a width of less than 30 inches b having a combustion chamber situated 6 inches from a door c that is isolated from the bedroom or bathroom d with return-air grilles situated at least 10 feet from combustibles a. 1 - ANSElectrical wiring should be installed at least ____ inch(es) away from ducts and pipes. a. 1 b. 1-1/ c. 3 d. 2

e. 1/2- a. 1 - ANSEvaporator coolers have an air gap a minimum of ____ inch(es) between the water discharge at the float and the water level. a. 1 b. 2 c. 3 d. 4 a. 1 - ANSFor every 300 square feet of attic floor, there should be _____ square foot/feet of ventilation. a. 1 b. 2 c. 4 d. 3 a. 12 - ANSElectrical receptacles should be located within ______ feet of each other. a. 12 b. 25 c. 8 d. 3 a. 16 ..... 8 - ANSAt a fireplace with an opening of less than 6 square feet, the minimum required size of the hearth extension is _____ inches at the front, and _____ inches at the sides.

a. 24 - ANSIn townhouses, the minimum separation for metal electrical boxes on

a. 25 - ANSSteam moves through a pipe at an average rate of _____ miles per

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• a. both sides of a common wall is _____ inches.
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• a. a. 3 - ANSA crawlspace should have one vent at least ______ feet from the corner.
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a. 3 - ANSAttic venting can be 1/300 when turbine vents are mounted ___ feet above the eaves. a. 3 b. 6 c. 2 d. 8 a. 4 - ANSCatalytic combustors on wood stoves typically last up to ____ years. a. 4 b. 8 c. 12 d. 16 a. 4 - ANSRafter ties that are sized 1x4 inches should be spaced _____ feet on center. a. 4 b. 5 c. 3 d. 2 a. 6 - ANSMost residential construction requires two separate grounding electrodes that need to be at least ____ feet apart. a. 6 b. 18 c. 12

d. 4 a. 6 - ANSNon-metallic sheathed cable should be installed ___ feet away from a non-permanent ladder in an attic access where the wiring will not require physical protection. a. 6 b. 18 c. 12 d. 3 a. 6 - ANSSurface-mounted fluorescent or recessed incandescent lights in a closet need clearance from storage areas of at least _____ inches. a. 6 b. 18 c. 24 d. 12 a. 70% - ANSOn average, _______ of all homes inspected show some indications of mold growth. a. 70% b. 15% c. 5% d. 35% a. 8 - ANSAll electrical wires should clear flat roofs by at least ____ feet. a. 8

b. 14 c. 3 a. 8 ..... 9 - ANSOn a stairway, the maximum rise is ____ inches, and minimum run is ____ inches. a. 8 ..... 9 b. 7 ..... 8 c. 9 ..... 10 d. 8 ..... 7 a. 8 inches - ANSA non-metallic sheathed conductor without a bushing at the electrical sub-panel should be secured at _______ above the panel. a. 8 inches b. 12 inches c. every 4-1/2 feet a. a sight glass/gauge - ANSA steam system differs from other heating systems in that it has ___________. a. a sight glass/gauge b. a high-limit switch c. multiple thermostats d. a barometric damper a. air filters, boilers and hydronic systems don't filter the air - ANSAn advantage of warm-air systems over other types is __________. a. air filters, boilers and hydronic systems don't filter the air

b. really warm air c. lower water bills a. as close as possible to each appliance - ANSGas shutoff valves should be located ___________. a. as close as possible to each appliance b. as close as possible to the door c. as far from the appliance as possible d. as close as possible to the floor a. asphalt - ANSDramatic slope is likely less if the ground surface is ________. a. asphalt b. sand a. at the top of a window - ANSA pediment can be found _________. a. at the top of a window b. under a deck c. at the bottom of a sliding glass door d. at the bottom of a window a. between the end of a filler tube and a reservoir - ANSIt is typical to find a 1-inch air gap __________. a. between the end of a filler tube and a reservoir b. at the open end of a pipe c. at the open end of a faucet

d. at the open end of a vent a. combustion-air vent - ANSGas piping may run in or through a __________. a. combustion-air vent b. return-air duct c. dumbwaiter chute d. supply-air duct a. cool - ANSIn a heating-only climate, an uninsulated heating duct running through a garage will deliver ______ air to the room at the other end of the duct. a. cool b. humid c. overheated d. warm a. countertop circuits may contain lighting fixtures - ANSEach of the following statements is true of branch circuits in a kitchen, except that _________. a. countertop circuits may contain lighting fixtures b. no point along the countertop may be more than 24 inches from a receptacle c. two 20-amp small-appliance circuits are required d. any circuit above the countertop must be GFCI-protected a. double top plate and a single sole plate - ANSA load-bearing stud wall has a ____________. a. double top plate and a single sole plate

b. double top plate and a double sole plate c. single top plate and a single sole plate d. double top plate and a triple sole plate e. single top plate and a double sole plate a. duplex receptacle whose top and bottom halves are on individual dedicated circuits - ANSA kitchen split-receptacle is a ____________. a. duplex receptacle whose top and bottom halves are on individual dedicated circuits b. stove circuit c. switched circuit operating a wall receptacle d. circuit servicing a separate cooktop and oven a. effective resistance of the wire is increased, so the fuse can no longer adequately protect the wire from overheating - ANSA damaged or nicked wire is a safety hazard because the ___________________. a. effective resistance of the wire is increased, so the fuse can no longer adequately protect the wire from overheating b. damaged wire may corrode c. wire's effective diameter has been decreased, thereby decreasing the resistance of the wire a. fixed - ANSMost residential heating systems are of _______ output. a. fixed b. variable

a. flashing applied over flashing - ANSCounter-flashing is ______________. a. flashing applied over flashing b. the flashing used at the ridge or peak of the roof c. flashing used to allow water to disperse under the roof covering d. always used in valleys a. frost-heaving of floors - ANSEvidence of wet basement problems include all of the following, except __________. a. frost-heaving of floors b. musty odors c. damaged interior finishes d. structural deterioration e. visible mold growth a. greater if the client's expectations are not realistic - ANSA home inspector's liability is ___________. a. greater if the client's expectations are not realistic b. greatest for the veteran inspector c. eliminated if a written report is provided to the client d. an issue only if the inspector performs sloppy inspections a. inadequate heat and/or hot water - ANSOne common problem with combination heating systems is __________. a. inadequate heat and/or hot water b. over-sizing

c. inadequate combustion air d. increased fuel consumption and cost e. excess pressure at the faucets a. It can, but it doesn't have to. - ANSShould the home inspection report note the type of flashing material? a. It can, but it doesn't have to. b. Yes -- it should always be included in the inspection report. a. late 1800s to early 1900s - ANSItalian Renaissance-style houses were most commonly built in the _________. a. late 1800s to early 1900s b. mid-1900s c. mid-1800s d. late 1900s e. early 1800s a. leaky furnace ducts - ANSOne condition that can cause negative pressure within a home is __________. a. leaky furnace ducts b. wet vents c. an inefficient oven d. combustion air vents a. metal-framed - ANSCondensation is typically found on ________ windows.

a. metal-framed b. triple-glazed c. vinyl-framed d. wood-framed a. oil-canning - ANSAll of the following are common problems with built-up roofing except ___________. a. oil-canning b. blistering c. ridging d. alligatoring a. orange - ANSAn oil flame should be ________ in color. a. orange b. yellow c. blue d. white a. polyethylene plastic - ANSAll of the following are common materials used for water entry piping, except ___________. a. polyethylene plastic b. PVC c. welded steel pipe d. CPVC e. copper

a. require a limited pre-inspection agreement - ANSPartial inspections usually _________. a. require a limited pre-inspection agreement b. don't require a pre-inspection agreement c. are requested by realtors d. require no disclosure from the seller a. rust - ANSCommon problems with window frames include all of the following, except ____________. a. rust b. frame deformation c. rot d. drain holes that are blocked or missing a. shakes - ANSInterlay is used on ___________. a. shakes b. shingles c. masonry d. BUR a. single piece of equipment that incorporates heating and cooling equipment - ANSA rooftop package unit is a ____________. a. single piece of equipment that incorporates heating and cooling equipment b. roof-mounted air-conditioning unit

c. roof-mounted heating unit a. spike - ANSA typical type of gutter attachment is a _________. a. spike b. joist hanger c. spoke d. hinge a. spillage at appliance vents - ANSNegative pressure within a house may result in _________. a. spillage at appliance vents b. a positive vent pressure c. increased fuel consumption d. efficient fuel consumption a. steam heating - ANSA Hartford loop is present on a(n) __________ system. a. steam heating b. warm-air gravity c. gas-fueled hydronic boiler d. oil-fueled hydronic a. taking the outdoor coil rating and going 1,000 BTUs in the direction of the indoor coil rating - ANSIf the condenser and evaporator coils have different capacity ratings, the total capacity is determined by ______________. a. taking the outdoor coil rating and going 1,000 BTUs in the direction of the indoor coil rating

b. subtracting the smaller capacity from the greater capacity c. averaging the two capacities by adding them together and dividing by 2 d. adding the two capacities together a. uses a reversing valve to reverse the refrigerant flow in the piping and is able to heat or cool a house - ANSA heat pump ________________. a. uses a reversing valve to reverse the refrigerant flow in the piping and is able to heat or cool a house b. can be instantly changed from one operating mode to the other c. can operate efficiently at temperatures below about 45 degrees Fahrenheit d. is able to heat or cool a house e. uses a reversing valve to reverse the refrigerant flow in the piping a. validate the claims their clients make about their homes' condition - ANSIn some states, real estate agents are legally required to ____________. a. validate the claims their clients make about their homes' condition b. pay the pre-sale home inspection fee c. appraise the value of the properties they sell d. hire home inspectors to perform pre-sale inspections a. watts divided by volts (A = W / V) - ANSAmps equals _________. a. watts divided by volts (A = W / V) b. watts times volts (A = W x V) c. watts plus volts (A = W + V)

a. weatherhead does not clear the roof by 3 feet - ANSA service mast must be used with a service drop if the _____________. a. weatherhead does not clear the roof by 3 feet b. service drop clears the roof by more than 3 feet c. service drop is large enough to carry more than 125 amps d. attachment point is too low for the service drop to clear the roof by 3 feet a. will produce lower indoor humidity - ANSCompared to a gas furnace, it is false that an electric furnace ____________. a. will produce lower indoor humidity b. can be adapted for the addition of central air conditioning just as easily c. will require a larger electrical service d. will lead to higher heating bills e. operates at increased efficiency b 24 - ANSA roof that has a problem with ponding generally still has water on it at least ____ hours after it has rained. a. 12 b. 24 c. 2 d. 48 e. 72 b 3 - ANSA flex line connected to a gas heater may be _____ feet long. a 6

b 3 c 9 d 12 b 6 - ANSA foundation supporting wood framing should extend ___ inches above a finished grade. a 2 b 6 c 8 d 12 b barometric damper - ANSA forced-air heating system that is fueled by oil is evidenced by the presence of a ___________. a pressure-temperature gauge b barometric damper c condensate line d sight glass b if a grounded circuit is desired - ANSExisting knob-and-tube wiring should be replaced ______________. a. because it is no longer allowed by any electrical codes b if a grounded circuit is desired c because it is prone to be dangerous d because its design is known to be defective

b, two-part - ANSProper chimney flashings are ________. a. three-part b, two-part c. one-part b. 10 - ANSAn electrical receptacle installed within ____ feet of a hot tub requires a GFCI. a. 2 b. 10 c. 3 d. 4 b. 12 - ANSAccording to U.S. standards, the electrical service line above a driveway must be at least ____ feet high. a. 24 b. 12 c. 36 b. 12 - ANSAn anchor bolt should be within ____ inches of the end of the sill plate. a. 24 b. 12 c. 4 d. 18

b. 12 - ANSCombustibles that project out beyond a fireplace opening by 1-1/ inches should be placed ____ inches above the opening. a. 24 b. 12 c. 4 d. 6 b. 12-22 psi - ANSPressure-reducing valves on hot-water heating systems are typically set at _________. a. 5-7 psi b. 12-22 psi c, 30 psi d. 7-12 psi e. 17-22 psi b. 15 - ANSAny glazing that is at a slope of more than ____degrees off vertical should not be treated as a window but as a skylight. a. 45 b. 15 c. 20 d. 10 b. 150 - ANSOne square foot of ventilation is recommended for every _____ feet of crawlspace area. a. 400 b. 150

c. 600 d. 700 b. 1935 - ANSBrass water piping was most commonly used around __________. a. 1950 b. 1935 c. 1900 d. 1985 b. 2 square inches - ANSFor a conventional gas furnace, about ________ per 1,000 BTUs of ventilation for combustion air should be provided. a. 1 square foot b. 2 square inches c. 1 square inch d. 2 square feet b. 2 to 3 - ANSIn a steam-heating system, the operating cut-off control is set at _____ psi. a. 12 to 24 b. 2 to 3 c. 0.5 to 1 b. 2.31 feet - ANSOne PSI equals a column of water _______ high. a. 2.2 feet b. 2.31 feet

c. 1 foot d. 3 feet b. 20 ..... 12 - ANSAt a fireplace with an opening of greater than 6 square feet, the minimum required size of the hearth extension is _____ inches at the front, and _____ inches at the sides. a. 20 ..... 16 b. 20 ..... 12 c. 24 ..... 12 d. 22 ..... 12 b. 3 WL - ANSOf the following examples, the highest level of radon is ______. a. 0.3 WL b. 3 WL c. 0.3 pCi/L d. 3 pCi/L b. 4 - ANSA weep screed should be placed ____ inches above grade. a. 6 b. 4 c. 2 d. 8 b. 40% - ANSA non-bearing partition stud can be _____ notched. a. 50%

b. 40% c. 25% d. 30% b. 48 - ANSA stairway that is _____ inches or more wide must have two handrails. a. 72 b. 48 c. 24 d. 36 b. 700 to 1,000 - ANSIn moderate climates, most houses have HVAC systems sized at 1 ton of cooling for every _______ square feet of interior area. a. 1,500 to 3,000 b. 700 to 1,000 c. 450 to 600 d. 50 to 100 b. 8 - ANSA ground rod should be driven a minimum of _____ feet below grade. a. 4 b. 8 c. 6 d. 10 b. 8 - ANSAll sills and plates that rest on a concrete or masonry exterior wall less than _____ inches above grade must use treated lumber.

a. 18 b. 8 c. 10 d. 12 b. acceptable - ANSIt is _______ in many jurisdictions for electrical wiring and plumbing pipes to be run inside return ducts. a. unacceptable b. acceptable b. at least 6 inches - ANSHow far away should combustibles be from fireplace openings? a. at least 14 inches b. at least 6 inches c. at least 10 inches d. at least 12 inches e. at least 8 inches b. better heat-transfer characteristics but a shorter lifespan - ANSCopper-tube boilers typically have _______________ than cast-iron boilers. a. better heat-transfer characteristics and a longer lifespan b. better heat-transfer characteristics but a shorter lifespan c. worse heat-transfer characteristics but a longer lifespan d. worse heat-transfer characteristics and a shorter lifespan

b. comparing the temperature of water entering the tank with the temperature of the water exiting it - ANSAll of the following are ways of rating a water heater, except __________. a. knowing the size of the burner b. comparing the temperature of water entering the tank with the temperature of the water exiting it c. knowing the volume of water it can hold b. cooling load - ANSHeat pumps are generally sized based on the __________. a. number of occupants b. cooling load c. heating load b. defects caused by improper installation in the rough opening and unsatisfactory performance of moving their parts - ANSDoors and windows should be inspected for _______________. a. their burglar resistance b. defects caused by improper installation in the rough opening and unsatisfactory performance of moving their parts c. only for unsatisfactory performance of their moving parts d. only for defects caused by improper installation in the rough opening b. end 1 inch above the waste drain line - ANSA condensate line should ______________. a. empty directly into the waste drain line b. end 1 inch above the waste drain line