2021 ICC B1 Residential Building Inspector Exam Quiz Welcome to your free 2021 ICC B1 Residential Building Inspector Exam Quiz REQUIRED - Enter your email address to receive a printable copy of your test results. 1. A combustion air passageway having a minimum size of _______________ square inches and a maximum size of _______________ square inches shall be provided as an exterior air supply for a factory-built or masonry fireplace, unless the room is mechanically ventilated and controlled so that the indoor pressure is neutral or positive. 25, 75 6, 55 25, 55 6, 25 2. The building official has the authority to _______________ the provisions of the code. waive ignore interpret violate 3. When located in the end of a solid lumber ceiling joist a notch shall have a maximum depth of _______________. 1 inch 2 inches one-third the joist depth one-fourth the joist depth 4. For an asphalt shingle application where the roof has a slope of up to ______________, double underlayment is required. 4:12 5:12 3:12 2:12 5. Eave overhangs shall not exceed _______________ in horizontal projection in a cold-formed steel-framed roof system. 24 inches 18 inches 12 inches 6. Plate washers used in the connection of braced wall line sills to a concrete foundation shall be a minimum of _______________ in size for a building in Seismic Design Category D0. 0.188 inch by 2 inches by 2 inches 0.375 inch by 3 inches by 3 inches 0.229 inch by 3 inches by 3 inches 0.229 inch by 2 inches by 2 inches 7. The continuous vapor barrier required in an under floor and unvented crawl space, shall extend a minimum of _______________ inches up the stem wall. 6 4 8 3 8. A maximum stone size of _______________ inch gravel used as a footing material for a wood foundation, must be washed, and well graded. 1/4 1 1/2 3/4 9. What are the minimum and maximum required footing projections for a concrete footing having a thickness of 8 inches? 2 inches, 8 inches 4 inches, 8 inches 2 inches, 4 inches 8 inches, 12 inches 10. When there is no geotechnical evaluation to determine soil characteristics, clayey silt material will be concluded to have a presumptive load-bearing value of _______________. 2000 psf 1500 psf 3000 psf 4000 psf 11. The landing at the exterior of required egress doors shall be located a maximum of _______________ inches below the top of the threshold, where the door does not swing over the landing. 8 inches 7 inches 7 3/4 inches 7 1/2 inches 12. At all points above the allowed handrail height, and below the required headroom height, stairways shall be a minimum _______________ wide. 30 inches 36 inches 34 inches 38 inches 13. What is the minimum permitted horizontal dimension of any habitable room? 9 feet 8 feet 6 feet 7 feet 14. The aggregate glazing area should be a minimum of _______________ of the floor area, when natural light is used to fulfil the minimum light requirements for habitable rooms. 8 percent 4 percent 5 percent 10 percent 15. The provisions of the International Residential Code are applicable to one- and two-family dwellings and townhouses a max. of ________ above grade plane. 1 story 2 stories 3 stories 4 stories 16. The thickness of blown-in or sprayed roof/ceiling insulation must be written in inches on a marker installed every ________ throughout the attic space. 100 square feet 200 square feet 300 square feet 400 square feet 17. Photovoltaic shingles can only be used on roof slopes that are ________ or greater. 1 units vertical in 12 units horizontal 2 units vertical in 12 units horizontal 3 two units vertical in 12 units horizontal 4 units vertical in 12 units horizontal 18. What is the maximum allowable span for masonry veneer openings? 12'-2" 14'-6" 16'-0" 18'-3" 19. What is the maximum allowable span of a hem-fir header for exterior bearing walls supporting a roof and a ceiling consisting of two 2 x 8s in a building having a width of 36 feet with a ground snow load of 50 psf? 2 feet, 10 inches 3 feet, 8 inches 4 feet, 2 inches 5 feet, 4 inches 20. In floors, exterior deck ends of beams must have not less than ________ of bearing on concrete or masonry for the entire width of the beam. 1 inch 2 inches 3 inches 4 inches