NACHI TEST 2024 QUESTIONS AND ANSWERS VERIFIED 100% CORRECT!

A hole may be bored no closer than _____ from the top or bottom of a joist. - ANS-2 inches A heater thermostat located in the kitchen will tend to keep the rest of the house _______ than is desirable. - ANS-Cooler A home inspector can use a microwave leak-detector to check - ANS-microwave ovens A home inspector's liability is ... - ANS-greater if the client's expectations are not realistic A home's main fuses or breakers are most likely to trip _____________. - ANS-when many large appliances are operating simultaneously A hopper is a common type of - ANS-Window A horizontal fire block is required around a metal chimney pipe at ___________ lines. - ANS-floor and ceiling A hot-water supply that is 1/2-inch in diameter for a home that has four bedrooms and two and a half bathrooms means that there will - ANS-Not be an adequate water supply A joist below and parallel to a bearing wall should be - ANS-doubled A jumper wire should be used to bridge the electrical ground across a ? - ANS-water meter A kitchen split-receptacle is a ? - ANS-duplex receptacle whose top and bottom halves are on individual dedicated circuits A lintel can be found - ANS-in a wall A missing or undersized lintel can put pressure on the ___________. - ANS-windows A loose vent connection at the chimney can ______________. - ANS-allow exhaust gases to enter the home A louver window is more desirable in a ________ climate. - ANS-warm A low slope can lead to problems with all of the following types of roof-covering materials, except ___________. - ANS-roll roofing A load-bearing stud wall has a ____________. - ANS-double top plate and a single sole plate A non-bearing partition stud can be _____ notched - ANS-40% A non-metallic sheathed conductor without a bushing at the electrical sub-panel should be secured at _______ above the panel. - ANS-8 inches A parapet wall is - ANS-a wall that protrudes above the roofline A pediment can be found - ANS-at the top of a window A pitch pocket would most likely be used in or with a - ANS-plumbing stack A plumbing drain line should run downhill at a slope of - ANS-1/4-inch per foot A plumbing inspection does not include the - ANS-lawn sprinkler systems A pressure/temperature-relief valve on a hot water tank should have an extension to - ANS-the floor A problem with homemade leaf screens or guards is that they sometimes - ANS-fall into the gutters, leading to faster clogging of the guttering system than if it had no screens at all A property's grading should be maintained up to ____ feet away from the house. - ANS-6 A puddle on a flat roof that is 20 x 20 feet in area and an inch deep weighs - ANS-1 ton A pump just before the water return at a boiler is an indication that it is a... - ANS-forced hot-water system A radiant-heat systems uses _________ to radiate heat. - ANS-pipes and panels and/or entire walls, floors and/or the ceiling Channel and drop" is a type of ? - ANS-wood siding Which of the following soils can support the least load-bearing pressure? - ANS-Silt with high compressibility In general, the grading around a building should be positively sloped for how many feet away from the building? - ANS-10 feet Flashing is not required at which of the following locations? - ANS-Above projecting masonry Under which of the following conditions is a two-coat stucco system acceptable on the exterior of a building? - ANS-If the system is installed over masonry or concrete Which of the following locations is the worst place to cut a hole in an I-joist? - ANS-In the flange Why must building footings extend below the frost line? - ANS-So that the soil around the footing does not freeze, expand, and cause the footing to shift Which of the following locations does not require a GFCI outlet? - ANS-Receptacles that serve appliances Which of the following is the way that most homes' electrical systems are grounded? - ANS-Through a connection to the water piping What are the types of heat that must be taken into account when calculating the cooling loads for an HVAC system? - ANS-Sensible and latent heat How many BTU's per hour is a ton of cooling capacity in HVAC equipment equal to? - ANS-12,000 BTU/hr A gas furnace is being installed in a brand new building. What is the most likely reason that an outdoor air source would be required? - ANS-The building has unusually tight construction. What is the purpose of an expansion tank in a hot water system? - ANS-It allows the water to expand as it warms without increasing the pressure in the system. Which of the following is not a code requirement for electric clothes dryer exhaust ducts? - ANS-The diameter of the duct must be per the manufacturer's requirements but not less than 6". Which of the following would be most likely to have the highest R-value? - ANS-6" fiberglass batt insulation The utility bills for heating and cooling a home are much higher than expected. Which of the following choices is probably not a reason for this increased cost? - ANS-The fresh air intake for the HVAC system is incorrectly sized. Which of the following requires the most Water Supply Fixture Units (WSFU) when designing the water supply component of a plumbing system? - ANS-Dishwasher What is a trap seal? - ANS-A waste pipe that is curved in such a way that water always remains in the pipe Which of the following is not a required clearance around a toilet per the IRC code (International Residential Code)? - ANS-24" from front of toilet to opposite wall Which of the following situations would probably not make a sump pump necessary? - ANS-If a house is constructed of a slab on grade and has no basement Which of the following is not a requirement for guardrails? - ANS-They must be used whenever an interior stair has an elevation change of 24" or more. Which of the following is not a requirement for typical stairs in homes? - ANS-The maximum allowable riser height is 7 ¾". Which one of the following parameters of a window means that it does not have to be constructed of safety glass? - ANS-The bottom edge of the window is 30" above the walking surface. What are the minimum dimensions that a chimney must be away from the roof in order to minimize the chances of fire? - ANS-It must be a minimum of 3' above the roof and 2' above any part of the roof within 10'. Which of the following is not true of a spark arrester in a masonry chimney? - ANS-The spark arrester is not required when the roof is constructed of non-combustible materials. If a dishwasher runs but will not fill with water, which of the following is not a potential reason why? - ANS-The breaker that the dishwasher runs on may have been tripped. If the burners on a gas range will not light, which is least likely to be the reason why? - ANS-There is a gas leak occurring. Which of the following choices shows the correct typical voltage for a washing machine and electric dryer? - ANS-Washing Machine: 120V, Electric Dryer: 240V A gate is installed in a fence around a pool. Which of the following characteristics is the gate not required to have? - ANS-The gate must open toward the pool. Which of the following is the greatest advantage of wood stud construction over steel stud construction? - ANS-Walls made of wood studs generally have a higher R-value than an equivalent wall made of steel studs. Wind load on a building is an example of what type of load? - ANS-Lateral Load What is the minimum R-value of insulation allowed in an attic? - ANS-R-30 is the minimum value of insulation required in an attic Which of the following is not a requirement for smoke alarm locations in a house? - ANS-At least one alarm on each story An inspector can often determine the approximate age of a home by its method of construction. Which of the following choices shows the methods of construction in order from first developed to most recently developed? - ANS-Post and beam construction, balloon framing, platform framing, ICF construction One is inspecting an EIFS (Exterior Insulation and Finishing System) wall system for deficiencies. Where would these be most likely to occur? - ANS-At the corners of the installation, such as around windows Which of the problems listed below could occur if gas-fired equipment has incorrect venting or not enough combustion air? - ANS-Carbon monoxide buildup What would one use a blower door test for? - ANS-In order to determine the amount of air infiltration in a house It is very important for inspectors to handle themselves with care around electrical systems. What is the minimum amperage that is generally considered fatal? - ANS-60 milliamps Two metal water pipes are connected with a plastic fitting. What is needed to ensure that the plumbing is grounded? - ANS-Jumper wire Which of the following radon detecting devices is an active device? - ANS-Continuous radon monitor When does asbestos pose a risk to the health of home occupants? - ANS-When it is damaged Which of the following observations would not be a likely cause of the failure of a septic field? - ANS-The septic field is installed in an area with a low water table. An inspector notes that the heat pump is not functioning and that the condensate pan under the air handler is full of water. Why might these two things be related? - ANS-The full condensate pan tripped a condensate overflow switch. The unit turned off in order to ensure that condensate did not spill. A wood floor in a home that is being inspected is beginning to buckle. What is the most likely reason that this is happening? - ANS-There is a leak that is keeping the floor wet. Which of the following does a home inspector not typically include in the inspection report? - ANS-A listing of repairs that may be needed What is the typical expected lifespan of an asphalt shingle roof? - ANS-20 years Which of the following components of the HVAC system would typically be expected to last the longest? - ANS-Hot water boiler Which of the following would be the most critical safety issue if it were discovered during an inspection? - ANS-Water dripping out of the bottom of the circuit breaker box Whose recommendation for a home inspector should prospective homeowners try to avoid? - ANS-The real estate agent Which of the following issues would an inspector be most likely to miss in a home inspection? - ANS-Mold inside a wall cavity caused by a pipe with a pinhole leak Which of the following is not a violation of the ASHI Code of Ethics? - ANS-Advertising one's services in a trade magazine Double-tapping ... is? - ANS-the term for attaching two wires to a single fuse or breaker terminal 10-AWG copper wire corresponds to ____-amp fuse size - ANS-30 12-AWG copper wire corresponds to ____-amp fuse size - ANS-20 14-2 Romex wire should be used with _____-amp breakers. - ANS-15 14-AWG copper wire corresponds to ____-amp fuse size. - ANS-15 8-AWG copper wire corresponds to _____-amp fuse size. - ANS-40 A 2,000-watt, 240-volt electric heater would draw ________ amps of current. - ANS-8.33 A 3-phase electrical system has ___ poles. - ANS-3 A 3-pole main disconnect might indicate - ANS-that a sub-panel is present A 40- to 50-year old galvanized steel water supply system - ANS-will probably have reduced water volume and pressure A 60-amp electrical service panel at a home that is 2,800 square feet would be considered - ANS-undersized A bathroom door sticks and there is a drywall crack above the door. What should you report? - ANS-The bathroom door sticks, which may have caused the drywall crack above it. A bathroom fan shall terminate a minimum of _____ feet from openings or the property line. - ANS-3 A bathroom light switch that is reachable from the tub or shower should be - ANS-moved A bathroom's permanently installed ceiling heat lamp should be installed over - ANS-empty space so that it doesn't overheat anything A boiler system's pressure-relief valve that discharges just after you turn up the thermostat may do so because of a ? - ANS-water-logged expansion tank A butterfly roof has a ... - ANS-valley A chimney should be - ANS-a minimum of 3 feet above the roofline and 2 feet higher than any other obstruction within 10 feet A chimney that has a height more than 2 feet above any roof within 10 feet is considered - ANS-a proper installation A chimney that is ______ inches or more wide should have saddle or cricket flashing. - ANS-30 A chimney top should be at least _____ above the roof and _____ higher than anything within _____ feet. - ANS-3..... 2..... 10 A clay tile liner inside a masonry chimney - ANS-may be round or rectangular A clothes dryer vent requires a - ANS-damper A clothes washer may not drain into a ______________. - ANS-kitchen sink drain A combination sewer is? - ANS-a sewer that handles both storm water and sanitary sewage A commercial roof inspection is different from a residential roof inspection because? - ANS-there is usually roof-mounted equipment present and the roofing materials may be unusual A common complaint with metal roofs is that they - ANS-are noisy A common problem with stairways is that their ________ are too small. - ANS-landings A compressor with a sump heater needs power for ____ hours before system operation. - ANS-24 hours or as specified by the manufacturer A concrete floor in a basement is ____________. - ANS-not considered a structural component of the house condensate drain system __________. - ANS-should have a vacuum break or air gap A condensate line should - ANS-end 1 inch above the waste drain line A condensing furnace - ANS-is more efficient than conventional furnaces and uses a secondary heat exchanger A conventional asphalt shingle installation has a minimum slope of _______. - ANS-2:12 A conventional fireplace ____________________. - ANS-may be a significant heat waster due to heat going up chimney A crawlspace should have one vent at least ______ feet from the corner. - ANS-3 A cross-connection is defined as when - ANS-a faucet spout is below the flood rim of a fixture A crucial characteristic for any roof style or design is - ANS-its ability to shed water A cupola is - ANS-a dome-like structure on a roof used as a lookout or to admit light and air A damaged or nicked wire is a safety hazard because - ANS-effective resistance of the wire is increased, so the fuse can no longer adequately protect the wire from overheating A deck that has carpet installed on the surface - ANS-is prone to moisture problems and cannot be adequately inspected A decorative shroud located on top of a factory-built chimney should not be installed unless it is - ANS-approved by the chimney manufacturer A dentil can be found on a _________. - ANS-cornice A descriptive word for the chipping and flaking of masonry is - ANS-spalling A disconnect for an air-conditioner condensing unit should be located within sight of the unit and no more than - ANS-5 feet away A double-sided, interior key-only deadbolt makes ________________. - ANS-emergency exit difficult A draft hood is - ANS-a vent A drainpipe from a catch basin should be at least... - ANS-3 inches in diameter A drainpipe that slopes too much will leave - ANS-solids behind. A dryer vent with a 45- and 90-degree elbow should have a maximum length of _____ feet. - ANS-17 1/2 A fireplace hearth should extend beyond the front of the fireplace by at least - ANS-16 inches. A firewall with a 1-hour rating has a _____-inch minimum distance for metal electrical outlet boxes installed on opposite sides of the wall - ANS-24 A flat roof system is considered a ? - ANS-watertight system A flex line connected to a gas heater may be - ANS-3 feet long. A foundation supporting wood framing should extend ___ inches above a finished grade - ANS-6 A foundation wall penetration should - ANS-be reported if signs of leakage exist, as this may cause the wall to crack A 4-year-old asphalt shingle roof that appears well-insulated, with an attic that is properly ventilated, but having roughly 25% of the shingles showing irregular cracks in the surface should be reported as ____________. - ANS-possibly having manufacturing defects and a shortened life expectancy A furnace's emergency shut-off switch should - ANS-be located between the furnace and the furnace room door A gable roof has - ANS-a ridge A gambrel is a type of - ANS-barn roof A garage can have ______ electrical circuits before it's required to have its own sub-panel. - ANS-six A garage's slab floor should slope to direct water away from the - ANS-interior walls A gas water heater shall not be installed in the - ANS-bathroom A general home inspection is visual an - ANS-non-invasive A GFCI continually checks for a difference in current between the - ANS-hot and neutral A good rule of thumb is that there should be a downspout for every - ANS-25 feet of gutter. A good rule of thumb for an oil furnace's exhaust flue is that it should - ANS-be no more than 10 feet long plus two elbows A grease trap is? - ANS-a device to collect grease from the dishwashing station at a commercial kitchen A ground rod should be buried a minimum of _____ feet below grade - ANS-8 A ground-source heat pump collects or dissipates heat through - ANS-piping buried in the ground A