NACHI TEST EXAM 2025 QUESTIONS AND ANSWERS
A hole may be bored no closer than _____ from the top or bottom of a joist. - CORRECT
ANSWER✅✅✅2 inches
A heater thermostat located in the kitchen will tend to keep the rest of the house _______ than is
desirable. - CORRECT ANSWER✅✅✅Cooler
A home inspector can use a microwave leak-detector to check - CORRECT ANSWER✅✅✅microwave
ovens
A home inspector's liability is ... - CORRECT ANSWER✅✅✅greater if the client's expectations are not
realistic
A home's main fuses or breakers are most likely to trip _____________. - CORRECT
ANSWER✅✅✅when many large appliances are operating simultaneously
A hopper is a common type of - CORRECT ANSWER✅✅✅Window
A horizontal fire block is required around a metal chimney pipe at ___________ lines. - CORRECT
ANSWER✅✅✅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 - CORRECT ANSWER✅✅✅Not be an adequate water supply
A joist below and parallel to a bearing wall should be - CORRECT ANSWER✅✅✅doubled
A jumper wire should be used to bridge the electrical ground across a ? - CORRECT
ANSWER✅✅✅water meter
A kitchen split-receptacle is a ? - CORRECT ANSWER✅✅✅duplex receptacle whose top and bottom
halves are on individual dedicated circuits
,A lintel can be found - CORRECT ANSWER✅✅✅in a wall
A missing or undersized lintel can put pressure on the ___________. - CORRECT
ANSWER✅✅✅windows
A loose vent connection at the chimney can ______________. - CORRECT ANSWER✅✅✅allow
exhaust gases to enter the home
A louver window is more desirable in a ________ climate. - CORRECT ANSWER✅✅✅warm
A low slope can lead to problems with all of the following types of roof-covering materials, except
___________. - CORRECT ANSWER✅✅✅roll roofing
A load-bearing stud wall has a ____________. - CORRECT ANSWER✅✅✅double top plate and a
single sole plate
A non-bearing partition stud can be _____ notched - CORRECT ANSWER✅✅✅40%
A non-metallic sheathed conductor without a bushing at the electrical sub-panel should be secured at
_______ above the panel. - CORRECT ANSWER✅✅✅8 inches
A parapet wall is - CORRECT ANSWER✅✅✅a wall that protrudes above the roofline
A pediment can be found - CORRECT ANSWER✅✅✅at the top of a window
A pitch pocket would most likely be used in or with a - CORRECT ANSWER✅✅✅plumbing stack
A plumbing drain line should run downhill at a slope of - CORRECT ANSWER✅✅✅1/4-inch per foot
,A plumbing inspection does not include the - CORRECT ANSWER✅✅✅lawn sprinkler systems
A pressure/temperature-relief valve on a hot water tank should have an extension to - CORRECT
ANSWER✅✅✅the floor
A problem with homemade leaf screens or guards is that they sometimes - CORRECT
ANSWER✅✅✅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. - CORRECT
ANSWER✅✅✅6
A puddle on a flat roof that is 20 x 20 feet in area and an inch deep weighs - CORRECT
ANSWER✅✅✅1 ton
A pump just before the water return at a boiler is an indication that it is a... - CORRECT
ANSWER✅✅✅forced hot-water system
A radiant-heat systems uses _________ to radiate heat. - CORRECT ANSWER✅✅✅pipes and panels
and/or entire walls, floors and/or the ceiling
Channel and drop" is a type of ? - CORRECT ANSWER✅✅✅wood siding
Which of the following soils can support the least load-bearing pressure? - CORRECT
ANSWER✅✅✅Silt with high compressibility
In general, the grading around a building should be positively sloped for how many feet
away from the building? - CORRECT ANSWER✅✅✅10 feet
Flashing is not required at which of the following locations? - CORRECT ANSWER✅✅✅Above
projecting masonry
, Under which of the following conditions is a two-coat stucco system acceptable on the
exterior of a building? - CORRECT ANSWER✅✅✅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? - CORRECT
ANSWER✅✅✅In the flange
Why must building footings extend below the frost line? - CORRECT ANSWER✅✅✅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? - CORRECT
ANSWER✅✅✅Receptacles that serve appliances
Which of the following is the way that most homes' electrical systems are grounded? - CORRECT
ANSWER✅✅✅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? - CORRECT ANSWER✅✅✅Sensible and latent heat
How many BTU's per hour is a ton of cooling capacity in HVAC equipment equal to? - CORRECT
ANSWER✅✅✅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? - CORRECT ANSWER✅✅✅The building has unusually
tight construction.
What is the purpose of an expansion tank in a hot water system? - CORRECT ANSWER✅✅✅It allows
the water to expand as it warms without increasing the pressure in the
system.
A hole may be bored no closer than _____ from the top or bottom of a joist. - CORRECT
ANSWER✅✅✅2 inches
A heater thermostat located in the kitchen will tend to keep the rest of the house _______ than is
desirable. - CORRECT ANSWER✅✅✅Cooler
A home inspector can use a microwave leak-detector to check - CORRECT ANSWER✅✅✅microwave
ovens
A home inspector's liability is ... - CORRECT ANSWER✅✅✅greater if the client's expectations are not
realistic
A home's main fuses or breakers are most likely to trip _____________. - CORRECT
ANSWER✅✅✅when many large appliances are operating simultaneously
A hopper is a common type of - CORRECT ANSWER✅✅✅Window
A horizontal fire block is required around a metal chimney pipe at ___________ lines. - CORRECT
ANSWER✅✅✅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 - CORRECT ANSWER✅✅✅Not be an adequate water supply
A joist below and parallel to a bearing wall should be - CORRECT ANSWER✅✅✅doubled
A jumper wire should be used to bridge the electrical ground across a ? - CORRECT
ANSWER✅✅✅water meter
A kitchen split-receptacle is a ? - CORRECT ANSWER✅✅✅duplex receptacle whose top and bottom
halves are on individual dedicated circuits
,A lintel can be found - CORRECT ANSWER✅✅✅in a wall
A missing or undersized lintel can put pressure on the ___________. - CORRECT
ANSWER✅✅✅windows
A loose vent connection at the chimney can ______________. - CORRECT ANSWER✅✅✅allow
exhaust gases to enter the home
A louver window is more desirable in a ________ climate. - CORRECT ANSWER✅✅✅warm
A low slope can lead to problems with all of the following types of roof-covering materials, except
___________. - CORRECT ANSWER✅✅✅roll roofing
A load-bearing stud wall has a ____________. - CORRECT ANSWER✅✅✅double top plate and a
single sole plate
A non-bearing partition stud can be _____ notched - CORRECT ANSWER✅✅✅40%
A non-metallic sheathed conductor without a bushing at the electrical sub-panel should be secured at
_______ above the panel. - CORRECT ANSWER✅✅✅8 inches
A parapet wall is - CORRECT ANSWER✅✅✅a wall that protrudes above the roofline
A pediment can be found - CORRECT ANSWER✅✅✅at the top of a window
A pitch pocket would most likely be used in or with a - CORRECT ANSWER✅✅✅plumbing stack
A plumbing drain line should run downhill at a slope of - CORRECT ANSWER✅✅✅1/4-inch per foot
,A plumbing inspection does not include the - CORRECT ANSWER✅✅✅lawn sprinkler systems
A pressure/temperature-relief valve on a hot water tank should have an extension to - CORRECT
ANSWER✅✅✅the floor
A problem with homemade leaf screens or guards is that they sometimes - CORRECT
ANSWER✅✅✅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. - CORRECT
ANSWER✅✅✅6
A puddle on a flat roof that is 20 x 20 feet in area and an inch deep weighs - CORRECT
ANSWER✅✅✅1 ton
A pump just before the water return at a boiler is an indication that it is a... - CORRECT
ANSWER✅✅✅forced hot-water system
A radiant-heat systems uses _________ to radiate heat. - CORRECT ANSWER✅✅✅pipes and panels
and/or entire walls, floors and/or the ceiling
Channel and drop" is a type of ? - CORRECT ANSWER✅✅✅wood siding
Which of the following soils can support the least load-bearing pressure? - CORRECT
ANSWER✅✅✅Silt with high compressibility
In general, the grading around a building should be positively sloped for how many feet
away from the building? - CORRECT ANSWER✅✅✅10 feet
Flashing is not required at which of the following locations? - CORRECT ANSWER✅✅✅Above
projecting masonry
, Under which of the following conditions is a two-coat stucco system acceptable on the
exterior of a building? - CORRECT ANSWER✅✅✅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? - CORRECT
ANSWER✅✅✅In the flange
Why must building footings extend below the frost line? - CORRECT ANSWER✅✅✅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? - CORRECT
ANSWER✅✅✅Receptacles that serve appliances
Which of the following is the way that most homes' electrical systems are grounded? - CORRECT
ANSWER✅✅✅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? - CORRECT ANSWER✅✅✅Sensible and latent heat
How many BTU's per hour is a ton of cooling capacity in HVAC equipment equal to? - CORRECT
ANSWER✅✅✅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? - CORRECT ANSWER✅✅✅The building has unusually
tight construction.
What is the purpose of an expansion tank in a hot water system? - CORRECT ANSWER✅✅✅It allows
the water to expand as it warms without increasing the pressure in the
system.
