What’s included Learn the material: General Building (B) Study Guide Book Pass the test: General Building (B) Practice Exam What this covers Per the state's classification, a B contractor may "contract to construct or superintend or engage in the construction of any building, highway, road, parking facility, railroad, excavation, or other structure." See the official CSLB B classification. This printed book covers the subjects the state tests. Sample questions: Try our free practice test Insulation is installed only after the:A. rough framing inspection · B. plumbing is complete · ✓ C. rough wiring is complete · D. rough plumbing is complete What is the largest hole that can be drilled in a double stud?A. 25 percent of the stud · B. 30 percent of the stud · C. 40 percent of the stud · ✓ D. 60 percent of the stud What is the minimum nailing spacing on the outer edge of the sheetrock?A. 3/8" from edge: 6 in. o.c · B. 1/2" from edge: 12 in. o.c · ✓ C. 3/8" from edge: 8 in o.c · D. 1/2" from edge: 8 in. o.c Which of the following is a vertical window in a projection built out from a sloping roof?A. A lintel · B. A gable · C. A gambrel · ✓ D. A dormer Which of the following is used to fasten a mudsill to the foundation?A. 12" bolts · ✓ B. 10" bolts · C. 8" bolts · D. 6" bolts