IRC EXAM PART 3 QUESTIONS
WITH CORRECT ANSWERS 2026
Photoelectric smoke alarms shall not be installed less than _____________ feet horizontally from a per
manently installed cooking appliance.
Ionization alarm separation distance is __________ feet, and ionization alarms with a silencing button i
s __________ feet. - CORRECT ANSWER -6
20
10
Section R314.3.1 Installation near cooking appliances, Item 3.
Smoke alarms shall receive their primary power from the building wiring where such wiring is served f
rom a commercial source and, where primary power is interrupted, shall receive power from a ______
_______ . - CORRECT ANSWER -battery
Section R314.6 Power source.
Physical interconnection of smoke alarms shall not be required where _____________ _____________
alarms are installed. - CORRECT ANSWER -listed wireless
(all alarms must sound upon activation of one alarm)
Section R314.4 Interconnection.
Smoke alarms are required in each ______________ ____________.
Smoke alarms are required outside each separate __________ __________.
Smoke alarms are required on each additional story of the dwelling, including ___________ and _____
_____ ___________ and not including _________ _________ and ___________ ___________. -
CORRECT ANSWER -sleeping room
sleeping area
basements, habitable attics
crawl spaces, uninhabitable attics
, R314.3 Smoke Alarms - Location
Carbon monoxide alarms shall be installed outside of each separate _____________ _____________ in
the immediate vicinity of the _____________ . - CORRECT ANSWER -sleeping area
bedrooms
(CO alarms are not required if there are no fuel-fired appliances and no attached garage)
Section R315.3 Location
When a _______-
_________ ___________ is located within a bedroom or its attached bathroom, a carbon monoxide al
arm shall be installed within the bedroom. - CORRECT ANSWER -fuel-burning appliance
R315.3 Carbon Monoxide Alarms - Location
Foam plastic insulation installed at 4 inches in thickness or less shall have a flame spread index of not
more than _____________ and a smoke-developed index of not more than _____________ . -
CORRECT ANSWER -75
450
SectionxR316.3.1xFoamxplasticxinsulationx4x inchesxthickx orxless.
Foamxplasticxshallxbex separatedx fromxthexinteriorxofxaxbuildingx byx anxapprovedx_____________x ____
__
_______xofxnotxlessxthanx_____________x -inchxgypsumxwallboard.x-
CORRECT
xthermal x ANSWERx -
x barrier
1/2
SectionxR316.4x Thermalxbarrier.
Axthermalxbarrierxisxnotxrequiredx forxfoamxplasticxinsulationxinxanxatticxthatx isxenteredx onlyxforx purp
ose
sxofx_____________xorx_____________x .x-xCORRECTxANSWERx-repairs
WITH CORRECT ANSWERS 2026
Photoelectric smoke alarms shall not be installed less than _____________ feet horizontally from a per
manently installed cooking appliance.
Ionization alarm separation distance is __________ feet, and ionization alarms with a silencing button i
s __________ feet. - CORRECT ANSWER -6
20
10
Section R314.3.1 Installation near cooking appliances, Item 3.
Smoke alarms shall receive their primary power from the building wiring where such wiring is served f
rom a commercial source and, where primary power is interrupted, shall receive power from a ______
_______ . - CORRECT ANSWER -battery
Section R314.6 Power source.
Physical interconnection of smoke alarms shall not be required where _____________ _____________
alarms are installed. - CORRECT ANSWER -listed wireless
(all alarms must sound upon activation of one alarm)
Section R314.4 Interconnection.
Smoke alarms are required in each ______________ ____________.
Smoke alarms are required outside each separate __________ __________.
Smoke alarms are required on each additional story of the dwelling, including ___________ and _____
_____ ___________ and not including _________ _________ and ___________ ___________. -
CORRECT ANSWER -sleeping room
sleeping area
basements, habitable attics
crawl spaces, uninhabitable attics
, R314.3 Smoke Alarms - Location
Carbon monoxide alarms shall be installed outside of each separate _____________ _____________ in
the immediate vicinity of the _____________ . - CORRECT ANSWER -sleeping area
bedrooms
(CO alarms are not required if there are no fuel-fired appliances and no attached garage)
Section R315.3 Location
When a _______-
_________ ___________ is located within a bedroom or its attached bathroom, a carbon monoxide al
arm shall be installed within the bedroom. - CORRECT ANSWER -fuel-burning appliance
R315.3 Carbon Monoxide Alarms - Location
Foam plastic insulation installed at 4 inches in thickness or less shall have a flame spread index of not
more than _____________ and a smoke-developed index of not more than _____________ . -
CORRECT ANSWER -75
450
SectionxR316.3.1xFoamxplasticxinsulationx4x inchesxthickx orxless.
Foamxplasticxshallxbex separatedx fromxthexinteriorxofxaxbuildingx byx anxapprovedx_____________x ____
__
_______xofxnotxlessxthanx_____________x -inchxgypsumxwallboard.x-
CORRECT
xthermal x ANSWERx -
x barrier
1/2
SectionxR316.4x Thermalxbarrier.
Axthermalxbarrierxisxnotxrequiredx forxfoamxplasticxinsulationxinxanxatticxthatx isxenteredx onlyxforx purp
ose
sxofx_____________xorx_____________x .x-xCORRECTxANSWERx-repairs
