2026 IRC EXAM CHAPTERS 3 AND 4
QUESTIONS WITH CORRECT ANSWERS
Photoelectric smoke alarms shall not be installed less than _____________ feet horizontally from a perm
anently installed cooking appliance.
Ionization alarm separation distance is __________ feet, and ionization alarms with a silencing button is
__________ 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 fro
m 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 _____________ _____________ al
arms 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 t
he 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 alar
m 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 mo
re than _____________ and a smoke-developed index of not more than _____________ . -
CORRECT ANSWER -75
450
Section R316.3.1 Foam plastic insulation 4 inches thick or less.
Foamvplasticvshallvbevseparatedvfromvthevinteriorvofvavbuildingvbyvanvapprovedv_____________v______
__
_____vofvnotvlessvthanv_____________v-inchvgypsumvwallboard.v-vCORRECTvANSWERv-
thermalvbarrier
1/2
SectionvR316.4vThermalvbarrier.
Avthermalvbarriervisvnotvrequiredvforvfoamvplasticvinsulationvinvanvatticvthatvisventeredvonlyvforvpurposes
of
v_____________ vorv_____________v.v-vCORRECTvANSWERv-repairs
QUESTIONS WITH CORRECT ANSWERS
Photoelectric smoke alarms shall not be installed less than _____________ feet horizontally from a perm
anently installed cooking appliance.
Ionization alarm separation distance is __________ feet, and ionization alarms with a silencing button is
__________ 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 fro
m 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 _____________ _____________ al
arms 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 t
he 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 alar
m 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 mo
re than _____________ and a smoke-developed index of not more than _____________ . -
CORRECT ANSWER -75
450
Section R316.3.1 Foam plastic insulation 4 inches thick or less.
Foamvplasticvshallvbevseparatedvfromvthevinteriorvofvavbuildingvbyvanvapprovedv_____________v______
__
_____vofvnotvlessvthanv_____________v-inchvgypsumvwallboard.v-vCORRECTvANSWERv-
thermalvbarrier
1/2
SectionvR316.4vThermalvbarrier.
Avthermalvbarriervisvnotvrequiredvforvfoamvplasticvinsulationvinvanvatticvthatvisventeredvonlyvforvpurposes
of
v_____________ vorv_____________v.v-vCORRECTvANSWERv-repairs
