2025 IRC EXAM CHAPTER 3 QUESTIONS
WITH CORRECT ANSWERS
Light switch is required at the top and bottom of interior stairs that have at least risers.
- correct answer-6
R303.7 Interior stairway illumination.
Smoke alarms must be minimum feet from heat registers or paddle fans. - correct answer-
3
Exterior stairways shall be provided with an artificial light source located at the
. - correct answer-top landing
R303.8 Exterior stairway illumination.
A top landing is not required where a stairway of not more than risers is located on the
exterior side of the door, provided that the door does not swing over the stairway. - correct answer-2
R311.3.2 Floor elevations at other exterior doors.
Ceiling height for showers, tubs, and other bathroom and toilet room fixtures shall be minimum
. - correct answer-80 inches (6'-8")
R305.1 Minimum height
Showers must be at least ____________ nches in each direction. - correct answer-30
R307.1 Space required.
inches minimum width of shower door. - correct answer-22
, inches minimum clearance in front of sinks and toilets. - correct answer-21
R307.1 Space required.
inches minimum width from center of a toilet to a wall or another fixture. -
correct answer-15
R307.1 Space required.
Handrails with a perimeter greater than 6 1/4 inches require a
on both sides if the profile. - correct answer-graspable finger recess area
Wood required to be pressure treated where it is resting on concrete that is in direct contact with the
ground. Sill plates, framing, and columns resting on slabs or foundation walls. - correct answer-
R317.1 Protection of Wood Against Decay - Location Required
Wood required to be pressure treated if within these distances in crawl spaces to the exposed ground:
- Wood joists/bottom of wood structural floor: inches
- Wood girder: inches
- Wood columns _________ nches - correct answer-18
12
8
R317.1 - Protection of Wood Against Decay - Location required
Termite protection for wood shall be , and field-
cut ends, notches, and drilled holes shall be in the field if required. - correct answer-
pressure treated
retreated
WITH CORRECT ANSWERS
Light switch is required at the top and bottom of interior stairs that have at least risers.
- correct answer-6
R303.7 Interior stairway illumination.
Smoke alarms must be minimum feet from heat registers or paddle fans. - correct answer-
3
Exterior stairways shall be provided with an artificial light source located at the
. - correct answer-top landing
R303.8 Exterior stairway illumination.
A top landing is not required where a stairway of not more than risers is located on the
exterior side of the door, provided that the door does not swing over the stairway. - correct answer-2
R311.3.2 Floor elevations at other exterior doors.
Ceiling height for showers, tubs, and other bathroom and toilet room fixtures shall be minimum
. - correct answer-80 inches (6'-8")
R305.1 Minimum height
Showers must be at least ____________ nches in each direction. - correct answer-30
R307.1 Space required.
inches minimum width of shower door. - correct answer-22
, inches minimum clearance in front of sinks and toilets. - correct answer-21
R307.1 Space required.
inches minimum width from center of a toilet to a wall or another fixture. -
correct answer-15
R307.1 Space required.
Handrails with a perimeter greater than 6 1/4 inches require a
on both sides if the profile. - correct answer-graspable finger recess area
Wood required to be pressure treated where it is resting on concrete that is in direct contact with the
ground. Sill plates, framing, and columns resting on slabs or foundation walls. - correct answer-
R317.1 Protection of Wood Against Decay - Location Required
Wood required to be pressure treated if within these distances in crawl spaces to the exposed ground:
- Wood joists/bottom of wood structural floor: inches
- Wood girder: inches
- Wood columns _________ nches - correct answer-18
12
8
R317.1 - Protection of Wood Against Decay - Location required
Termite protection for wood shall be , and field-
cut ends, notches, and drilled holes shall be in the field if required. - correct answer-
pressure treated
retreated
