CSLB B LICENSE GENERAL CONTRACTOR EXAM WITH 100% CORRECT ANSWERS (2024/2025)

If unused mortar stiffens due to hydration of cement, what must you do? - correct Answers-Discard the mortar What minimum time must you wait before caulking or grouting new tiles? - correct Answers-24-48 Hours How long should you wait before installing tile on a shower pan? - correct Answers-24 Hours Unstable dry rock, angular gravel, sandy loam, and cohesive soils having compressive strengths greater than 0.5 and less than 1.5 tons/sq ft (tsf), are typical examples of: - correct Answers-Type-B Soils If 65 street lights are fed by a 2275 volt series circuit, what is the voltage across each light? - correct Answers-35V In a series circuit, the total voltage is divided equally. For safety reasons, the maximum simple slope of an excavation, up to 20 ft deep, in Type-B soil is: - correct Answers-1:1 (45°) A Pittsburgh joint is used in: - correct Answers-HVAC ductwork The drain for a pressure relief valve on a water heater should be extended to: - correct Answers-The outside of the building What is the minimum slope toward the drain of a shower pan? - correct Answers-1/4" per foot (2%) What is the diameter of #3 rebar? - correct Answers-3/8" If a vendor fails to provide an MSDS, you have the right to call: - correct AnswersCal/OSHA or DOSH When installing a door jamb, you need shims at: - correct Answers-Both hinge and strike sides, three on each side. Which of the following is used to adhere vinyl floors? A. Epoxy cement B. Asphalt mastic C. Latex primer D. White glue - correct Answers-Epoxy cement When do you need bracing for a drywall wall? - correct Answers-Diagonal bracing is needed every 25' for any drywall wall. How should you clear the roots from a construction site? - correct Answers-Clear roots to 12" below grade. Dividing watts by amps gives you: - correct Answers-Volts The most frequent on-the-job roofing accidents are: - correct Answers-Falls Which of the following is NOT a type of wood block flooring? A. Parquet B. Wood Mosaic C. Wood Tile D. All of the above. - correct Answers-Wood tile Lightweight concrete is best used for: A. Curb and Gutter B. Second floor decking C. First floor slab on grade D. Footings - correct Answers-Second floor decking The tool used to carry grout needed to patch a small hole is a: A. Hawk B. Poling board C. Spot board D. Mason's scutch - correct Answers-Spot Board Which pipe is NOT appropriate for industrial wastes? A. Cast iron B. Schedule 40 ABS DWV C. Extra strength vitrified clay D. Copper - correct Answers-Copper Where do you need a fire wall? A. Between a living room and a bedroom B. Between a bedroom and a bathroom C. Between a kitchen and a bath D. A separation wall between a dwelling and an attachment - correct Answers-A separation wall between a dwelling and an attachment. What is the minimum clearance between rough ground and untreated subfloor joists? - correct Answers-18 inches Who may remove asbestos? - correct Answers-Contractor with Asbestos Certification on license. Which of the following is NOT likely to be found in significant proportions in granular soil? A. Gravel B. Sand C. Silt D. Clay - correct Answers-Clay Stiles and rails are used on which of the following? A. Furred walls B. Roofs C. Windows D. Slabs - correct Answers-Windows. A stile is the vertical edges of the window and the rails are the bottom and top. What does a high slump test indicate? - correct Answers-Too much water. Metal concrete forms should be? A. Oiled B. Watered C. Placed against gravel D. Discarded after each use - correct Answers-Oiled What does the R mean in a description of insulation? - correct Answers-Resistance What kind of door would you install for someone with a disability? A. Automatic with minimum of 3 seconds to close B. Automatic with maximum of 5 seconds to open C. Manual with maximum of 8.5 pounds to operate D. Either A or C - correct Answers-Either A or C Triple-walled metal chimney installations are regulated by: - correct Answers-ICC ICC-IBC-IRC is the international code council. IBC is international building code commercial. IRC is the international residential code. If you are a general contractor, you should call a specialty contractor when: - correct Answers-You encounter an unfamiliar trade. When a stairway serves a public building, what is the minimum number of steps for which a handrail is required? - correct Answers-Two What is the minimum underlayment for asphalt shingles? - correct Answers-15 pounds How long should you wait before sealing new tile work? - correct Answers-2 weeks When do you install insulation? - correct Answers-After the electrical and plumbing are approved. When do you NOT need an exhaust fan in a bathroom? - correct Answers-When there is a window in the bathroom. What is a bush-hammer used for? - correct Answers-Roughen surface of hardened concrete. When you say a wall is perfect it is: - correct Answers-Both plumb and straight. The purpose of a batter board in concrete work is: - correct Answers-Support layout strings when location foundations. What is the difference between a hip jack rafter and a common rafter? - correct Answers-A hip jack runs from the top plate to a hip rafter, but a common rafter runs to the ridge board. When should you float a concrete surface? - correct Answers-As soon as the water sheen evaporates When installing drywall screws you should: A. Countersink B. Drive just below the face of the board C. Leave slightly above the surface D. Use the highest torque setting - correct Answers-Drive just below the face of the board without breaking the paper. Before placing tile with mastic, you should: - correct Answers-Seal the surface. At an excavation, an Underground Service Alert (U.S.A) marking on the dirt that uses red paint or chalk means: - correct Answers-Electric power How many diameters is the minimum lap (overlap) between sections of rebar in reinforced masonry? A. 7 B. 12 C. 24 D. 30 - correct Answers-30 diameters What is the minimum length of a handrail extension that is required for a stairway? - correct Answers-12" When may a contractor work alone on a roof at a construction site? - correct AnswersNever A Freon recovery system is required when: A. Replacing a burnt out rotor in a hermetic unit B. Overhauling a rooftop A/C unit C. Scrapping an old refrigeration unit D. All of the above - correct Answers-All of the above Which of the following would you use to install roofing tiles? A. Slathers stake B. Any roofing tool C. Roofers hatchet D. Masking tape - correct Answers-A slathers stake A slathers stake looks like the head of a hammerhead shark. The head forms a T with the shaft, but the head is slightly bent. It provides a flat, straight edge for cutting and trimming your slate. When determining the layout of a residential building, the most important element to take into account is the: - correct Answers-Property lines Where should the first upper cabinet be installed? - correct Answers-At an inside corner Cemented soil: - correct Answers-Cannot be crushed into individual particles with fingers Which tool is best for measuring odd angles in an existing structure? - correct AnswersBevel square