2024 ICC B1 Residential Building Inspector Exam Quiz Welcome to your free 2024 ICC B1 Residential Building Inspector Exam Quiz First Name - Required Email - Required Phone Number (optional) 1. What is the minimum thickness of lumber sheathing where rafter or beam spacing is 48 inches? 1/4 inch 1/2 inch 1 inch T & G 1-1/2 inches T & G None 2. How far must a smoke alarm be installed from the door or opening of a bathroom containing a tub or shower (unless this would prevent proper placement)? 2 feet (610 mm) 3 feet (914 mm) 4 feet (1,220 mm) 5 feet (1,524 mm) None 3. If there is evidence that the groundwater table can rise to within 6 inches (152 mm) of the finished floor at the building perimeter, what must the grade in the under-floor space be? As high as the outside finished grade unless an approved drainage system is provided At least 12 inches below the exterior finished grade Sloped 1 inch per foot toward the center of the crawl spacees Lower than the exterior grade to collect groundwater for drainage None 4. In wood wall framing, studs must have full bearing on a nominal or a larger bottom (sole) plate or sill with a width at least equal to that of the studs. What is the minimum nominal? 2-by 3-by 4-by 5-by None 5. What is the maximum length of a horizontal chase or horizontal projection in masonry walls? 3 feet 4 feet 5 feet 6 feet None 6. What is the minimum required clear width of a stairway at and below the handrail height when a handrail is installed on one side only? 27 inches (698 mm) 30 inches (762 mm) 31-1/2 inches (787 mm) 36 inches (914 mm) None 7. Where wall coverings are considered, adhered masonry veneer installed on exterior stud walls must have a minimum clearance above the earth of: 2 inches 4 inches 6 inches 8 inches None 8. When a wall opening interrupts the required vertical reinforcement in a foundation wall, where must additional bars be placed? Centered directly above the opening Within 12 inches (305 mm) of each side of the opening Only on one side of the opening At the midpoint of the wall None 9. What is the minimum uniformly distributed live load for uninhabitable attics, without storage? 10 psf 20 psf 30 psf 40 psf None 10. What is the minimum yield strength of reinforcing steel used for footing and stem wall reinforcement? 40.000 psi (Grade 40) 60.000 psi (Grade 60) 75.000 psi (grade 75) 80.000 psi (grade 80) None 11. At what depth-to-thickness ratio must rafters or ceiling joists be laterally supported by blocking or bridging? 4 to 1 5 to 1 6 to 1 8 to 1 None 12. What is the maximum allowable spacing for 2 × 6 wood studs in a bearing wall that supports two floors and a roof-ceiling or habitable attic assembly? 10 inches 16 inches 20 inches 24 inches None 13. What is the maximum allowable cantilever span for floor joists supporting an exterior balcony, where the member size is 2×8 spaced at 12 inches on center, where the ground snow load is 30 psf? 28 inches 35 inches 42 inches 49 inches None 14. A large, fixed pane of glass is installed on the same wall as a swinging entry door. The bottom edge of the glass is 48 inches above the floor, and it is located 18 inches from the side of the door. Is this glass in a hazardous location requiring safety glazing? No, because the glass is fixed and does not open. No, because the bottom edge is more than 36 inches above the floor. Yes, because its bottom edge is less than 60 inches high AND it is within 24 inches of the door. Yes, but only if the door swings towards the glass. None 15. Masonry or concrete chimneys in Seismic Design Category D₀, D₁, or D₂ must be anchored at: The top of the flue only The foundation wall Each floor, ceiling, or roof line more than 6 feet above grade Only the roof line None 16. In wood floor framing, where are notches prohibited in solid sawn lumber joists, rafters, and beams? In the middle one-third of the span Within the first one-fourth of the span At the bearing locations None 17. What happens if a person constructs or alters a building in violation of the approved construction documents? Nothing, as long as the work passes inspection They must pay a small administrative fee They are subject to penalties as prescribed by law They can simply update the plans later None 18. When townhouse roof surfaces adjacent to a common wall are at the same elevation, how far must the parapet extend above the roof surface? 18 inches 24 inches 30 inches 36 inches None 19. What is the maximum fill depth permitted for clean sand or gravel beneath a concrete slab, unless otherwise approved by the building official? 12 inches (305 mm) 18 inches (457 mm) 24 inches (610 mm) 30 inches (762 mm) None 20. In wall construction, according to the IRC, headers must be supported on each end by which of the following? Double top plates only Metal straps and blocking only Solid sheathing panels One or more jack studs or approved framing anchors None Prove you are human: Time is Up!
