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CSLB B LICENSE GENERAL CONTRACTOR EXAM QUESTIONS WITH ACCURATE SOLUTIONS, Exams of Business Administration

CSLB B LICENSE GENERAL CONTRACTOR EXAM QUESTIONS WITH ACCURATE SOLUTIONS

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2024/2025

Available from 06/08/2025

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CSLB B LICENSE GENERAL CONTRACTOR EXAM
QUESTIONS WITH ACCURATE SOLUTIONS
1) Which of the following is NOT likely to be found in significant proportions in
granular soil?
A. Gravel
B. Sand
C. Silt
D. Clay -- Answer ✔✔ Clay
2) Stiles and rails are used on which of the following?
A. Furred walls
B. Roofs
C. Windows
D. Slabs -- Answer ✔✔ Windows.
A stile is the vertical edges of the window and the rails are the bottom and top.
3) What does a high slump test indicate? -- Answer ✔✔ Too much water.
4) Metal concrete forms should be?
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CSLB B LICENSE GENERAL CONTRACTOR EXAM

QUESTIONS WITH ACCURATE SOLUTIONS

  1. Which of the following is NOT likely to be found in significant proportions in granular soil? A. Gravel B. Sand C. Silt D. Clay -- Answer ✔✔ Clay
  2. Stiles and rails are used on which of the following? A. Furred walls B. Roofs C. Windows D. Slabs -- Answer ✔✔ Windows. A stile is the vertical edges of the window and the rails are the bottom and top.
  3. What does a high slump test indicate? -- Answer ✔✔ Too much water.
  4. Metal concrete forms should be?

A. Oiled B. Watered C. Placed against gravel D. Discarded after each use -- Answer ✔✔ Oiled

  1. What does the R mean in a description of insulation? -- Answer ✔✔ Resistance
  2. 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 -- Answer ✔✔ Either A or C
  3. Triple-walled metal chimney installations are regulated by: -- Answer ✔✔ ICC ICC-IBC-IRC is the international code council. IBC is international building code commercial. IRC is the international residential code.
  4. If you are a general contractor, you should call a specialty contractor when: -- Answer ✔✔ You encounter an unfamiliar trade.
  5. When a stairway serves a public building, what is the minimum number of steps for which a handrail is required? -- Answer ✔✔ Two
  6. What is the minimum underlayment for asphalt shingles? -- Answer ✔✔ 15 pounds
  7. How long should you wait before sealing new tile work? -- Answer ✔✔ 2 weeks
  1. At an excavation, an Underground Service Alert (U.S.A) marking on the dirt that uses red paint or chalk means: -- Answer ✔✔ Electric power
  2. How many diameters is the minimum lap (overlap) between sections of rebar in reinforced masonry? A. 7 B. 12 C. 24 D. 30 -- Answer ✔✔ 30 diameters
  3. What is the minimum length of a handrail extension that is required for a stairway? -- Answer ✔✔ 12"
  4. When may a contractor work alone on a roof at a construction site? -- Answer ✔✔ Never
  5. 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 -- Answer ✔✔ All of the above
  6. Which of the following would you use to install roofing tiles? A. Slathers stake B. Any roofing tool C. Roofers hatchet D. Masking tape -- Answer ✔✔ 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.

  1. When determining the layout of a residential building, the most important element to take into account is the: -- Answer ✔✔ Property lines
  2. Where should the first upper cabinet be installed? -- Answer ✔✔ At an inside corner
  3. Cemented soil: -- Answer ✔✔ Cannot be crushed into individual particles with fingers
  4. Which tool is best for measuring odd angles in an existing structure? -- Answer ✔✔ Bevel square
  5. From the following list, the best choice of woods for exterior carpentry are: A. Redwood and bald cypress B. Spruce and fir C. Pine and sugar maple D. Fir and hemlock -- Answer ✔✔ Redwood and bald cypress
  6. If a contractor discovers damaged utilities when starting a job, he should: -- Answer ✔✔ Call the utility department involved.
  7. Type-C soils have a compression strength of no more than 0.5 tsp. Which of the following would not be classified as a Type-C soil? A. Rounded gravel B. Crushed rock
  1. If unused mortar stiffens due to hydration of cement, what must you do? -- Answer ✔✔ Discard the mortar
  2. What minimum time must you wait before caulking or grouting new tiles? -- Answer ✔✔ 24 - 48 Hours
  3. How long should you wait before installing tile on a shower pan? -- Answer ✔✔ 24 Hours
  4. 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: -- Answer ✔✔ Type-B Soils
  5. If 65 street lights are fed by a 2275 volt series circuit, what is the voltage across each light? -- Answer ✔✔ 35V In a series circuit, the total voltage is divided equally.
  6. For safety reasons, the maximum simple slope of an excavation, up to 20 ft deep, in Type-B soil is: -- Answer ✔✔ 1:1 (45°)
  7. A Pittsburgh joint is used in: -- Answer ✔✔ HVAC ductwork
  8. The drain for a pressure relief valve on a water heater should be extended to: -- Answer ✔✔ The outside of the building
  9. What is the minimum slope toward the drain of a shower pan? -- Answer ✔✔ 1/4" per foot (2%)
  10. What is the diameter of #3 rebar? -- Answer ✔✔ 3/8"
  1. If a vendor fails to provide an MSDS, you have the right to call: -- Answer ✔✔ Cal/OSHA or DOSH
  2. When installing a door jamb, you need shims at: -- Answer ✔✔ Both hinge and strike sides, three on each side.
  3. Which of the following is used to adhere vinyl floors? A. Epoxy cement B. Asphalt mastic C. Latex primer D. White glue -- Answer ✔✔ Epoxy cement
  4. When do you need bracing for a drywall wall? -- Answer ✔✔ Diagonal bracing is needed every 25' for any drywall wall.
  5. How should you clear the roots from a construction site? -- Answer ✔✔ Clear roots to 12" below grade.
  6. Dividing watts by amps gives you: -- Answer ✔✔ Volts
  7. The most frequent on-the-job roofing accidents are: -- Answer ✔✔ Falls
  8. 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. -- Answer ✔✔ Wood tile
  1. What is the minimum clearance between rough ground and untreated subfloor joists? -- Answer ✔✔ 18 inches
  2. Who may remove asbestos? -- Answer ✔✔ Contractor with Asbestos Certification on license.
  3. In electrical work, the green wire is the: -- Answer ✔✔ Grounding conductor
  4. What is the longest length ladder that Cal/OSHA approves? -- Answer ✔✔ 44' is the longest ladder Cal/OSHA approves
  5. Under what condition can you add one additional layer to existing asphalt shingles on a roof? -- Answer ✔✔ If the roof is less than three layers.
  6. How should a residential water heater be protected from earthquakes? -- Answer ✔✔ It should be attached to a wall.
  7. You would use a 1.5 GPM fixture when: -- Answer ✔✔ You want to conserve water
  8. The best way to handle an I-beam is with a: -- Answer ✔✔ Nylon strap
  9. To determine if a wall is plumb, us a: -- Answer ✔✔ Level and straight edge
  10. The minimum required thickness for tempered glass used in residential shower doors is: -- Answer ✔✔ 1/8 is the minimum required thickness
  11. How many board feet are in a 5"D x 6"W x 20'L beam? -- Answer ✔✔ 50 board feet.
  1. When nailing roofing, the railheads: A. Should be brought almost to the surface of the shingle B. Should not exert any pressure on the roofing C. Should never be overdriven D. All of the above -- Answer ✔✔ All of the above
  2. Soldering of a copper pipe fitting is completed when: -- Answer ✔✔ Solder appears all around the joint.
  3. What is the maximum spacing of single nails in a single layer of drywall on the ceiling? -- Answer ✔✔ 7" is the maximum spacing of single nails in a single layer of a drywall ceiling.
  4. In construction, a hazardous area should be marked with what color tape? -- Answer ✔✔ Yellow tape should be used to mark off a hazardous area.
  5. Green board would be used for? -- Answer ✔✔ Bathroom walls or possible wet locations.
  6. The minimum size vent for a water closet is: -- Answer ✔✔ 1 1/2" minimum vent size for a water closet.
  7. Which tool would you use to apply mortar 1/2" thick? -- Answer ✔✔ Trowel
  8. When preparing plaster for a ceiling, which quantity is most important to monitor in the mixture? -- Answer ✔✔ Water
  1. Where would be the best place to look for a roof leak? -- Answer ✔✔ Valley flashings are the best place to look for a roof leak.
  2. What is the purpose of a condenser line for a furnace vent fan? -- Answer ✔✔ Help remove accumulated water in the vent.
  3. What is a register used for? -- Answer ✔✔ A register is used to supply air.
  4. The safety valve on a portable air compressor should be popped at least: -- Answer ✔✔ The safety valve on a portable air compressor should be popped at least weekly.
  5. Which of the following materials is acceptable for interior gas lines? A. Copper B. PVC C. Iron or steel D. ABS -- Answer ✔✔ Iron or steel is acceptable for interior gas lines.
  6. If a circular slab is a 45' in diameter, how much surface area does it cover? -- Answer ✔✔ Over 1,500 feet
  7. What material do you use to clean brushes and spills when painting with alkyd (oil) paints? -- Answer ✔✔ Paint thinner is to be used to clean up oil based paints and stains.
  8. Fiberglass insulation for walls should be attached to: A. The interior of the studs B. The face of the studs

C. The top and bottom of the studs D. There is no need to attach -- Answer ✔✔ There is no need to attach.

  1. Basement concrete walls should have a minimum test PSI at 30 days of: -- Answer ✔✔ A basement concrete wall should have a minimum of 3000 psi after 30 days.
  2. The term Ufer is associated with which trade? A. Roofing B. Plumbing C. Plastering D. Electrical -- Answer ✔✔ Electrical
  3. When working on rolling scaffolding, which of the following statements is correct? A. A locking system is required for each wheel. B. The scaffold must be able to support four times the designed weight limit. C. Scaffold wheels must be locked when in position. D. All of the above. -- Answer ✔✔ All of the above.
  4. What would you use to header a 4' opening? A. 2 each 2" x 6" continuous B. 4" x 6" continuous C. 2" x 8" continuous D. double 2" x 8" with plywood filler -- Answer ✔✔ 2 Each 2" x 6" continuous
  5. The wall between a garage and a bedroom must be at least: -- Answer ✔✔ The wall between a garage and a bedroom must be at least 5/8" drywall or 2 layers of 3/8" drywall.
  1. The maximum height from which concrete should be poured from is: -- Answer ✔✔ 6' is the maximum height in which concrete can be poured from.
  2. When you install iron bars on an emergency escape or rescue window, what is NOT required? A. A key lock to open from the outside B. Smoke detector C. The ability to open from the inside without a key D. None of the above is required -- Answer ✔✔ A key lock to open from the outside.
  3. How many nails should be used to install a metal edge bead in a drywall job? -- Answer ✔✔ Every 6" on both sides of the corner.
  4. A material CANNOT be classified as Type-A soil if it is fissured, previously disturbed, or: A. Subject to vibration from heavy traffic or pile driving B. Contains a large proportion of clay material C. Contains caliche or hardpan D. Has a high compressive strength -- Answer ✔✔ Type A soil can not be fissured, previously disturbed or subject to vibration from heavy traffic or pile driving.
  5. Beam-type platforms for suspended scaffolds must have stringers of lumber at least _______ set on edge. -- Answer ✔✔ 2" x 6"
  6. You want to install a hardwood floor over a concrete slab that already has a moisture barrier beneath the slab. What should you do? -- Answer ✔✔ Install another moisture barrier over the slab before applying the wood flooring.
  1. What type of felt underlayment should you use for metal tiles? -- Answer ✔✔ 30 pound or two plies of 15 pound.
  2. Concrete block is specified for a wall 50' long and 6' high. Approximately how many concrete blocks 8"W x 8"H x 16"L are required for the wall? -- Answer ✔✔ Area of the wall = 50 X 6 = 300 sq.ft Area of one block = 8 X 16 = 128/144 = 0.89 sq.ft Number of blocks = 300/0.89 = 337 Adding 5% extra blocks = 337 + 17 = 350 Height x Length wall divided by Height x Length of block.
  3. In cold climates, you cover freshly poured concrete to prevent: -- Answer ✔✔ Freezing
  4. How many days should you wait between the scratch coat and the brown coat when plastering? -- Answer ✔✔ You should wait 2 days between the SCRATCH coat and the BROWN coat when plastering.
  5. What maximum slope is specified by the UBS for a required handicap ramp? -- Answer ✔✔ The maximum slope allowed by UBS for a handicap ramp is 1:12 or 8.3%
  6. Mortar joint refers to: -- Answer ✔✔ A vertical or horizontal joint between masonry walls.
  7. The maximum weather exposure for 18" wood shingles is: -- Answer ✔✔ The maximum weather exposure for 18" wood shingles is 4"-6".
  1. Who provides the required MSDS sheets for a job site? -- Answer ✔✔ The vendor provides the MSDS for materials of a job site.
  2. What is the tolerance on effective depth when placing rebar in a slab 8" or less thick? -- Answer ✔✔ On a slab LESS than 8" thick, the tolerance on effective depth is
  • or - 3/8".
  1. What is the best method for installing ceramic tile? A. On particleboard with thinnest adhesive B. On particleboard with construction adhesive C. On cement board with thinnest adhesive D. On cement board with construction adhesive -- Answer ✔✔ On cement board with thinnest adhesive.
  2. Which type of header should be used for an exterior door with a width of 3' and a height of 6'-8"? -- Answer ✔✔ 2" x 6" two each.
  3. What is the minimum height of a toilet seat from the floor? -- Answer ✔✔ 15" is the minimum height of a toilet seat from the floor.
  4. Interior carpet should be installed with: -- Answer ✔✔ Interior carpet should be installed with tackless strips.
  5. Before wallpaper is applied to new drywall, it should be: -- Answer ✔✔ New drywall should be sealed before applying wallpaper.
  6. GFCIs are used in: -- Answer ✔✔ GFCIs should be used in series circuit, parallel circuits, and wet areas.
  1. You must bring an entire house up to current codes when remodeling costs reach what percentage of the total value of the house? -- Answer ✔✔ You never need to bring the entire house up to code.
  2. Who issues the permit for demolition of a building 3-stories or higher? -- Answer ✔✔ State authority would need to issue a permit for demolition of a building 3 stories or higher.
  3. If a vent fan is NOT installed in the bathroom of a commercial building, the minimum window: -- Answer ✔✔ If a vent fan is NOT installed in a bathroom of a commercial building, the minimum window opening must be 3 sqft.
  4. What is the advantage in using particleboard? -- Answer ✔✔ Particle board is less expensive than other options.
  5. What is the minimum size landing for an automatic electric door designed for disabled access? -- Answer ✔✔ 5' x 5' is the minimum size landing for an automatic electric door designed for disabled access.
  6. When do you get a framing inspection? -- Answer ✔✔ Framing inspections should be scheduled after the rough electrical and plumbing inspections.
  7. Can you directly nail hardwood flooring to a concrete slab? -- Answer ✔✔ You should never nail concrete directly to a concrete slab.
  8. Bricks on a job site should be covered: -- Answer ✔✔ Bricks should be covered when you leave the job site at the end of each workday.
  9. How many continuous watts of load are permitted in a 12 gauge branch circuit? -- Answer ✔✔ A 12 gauge branch circuit is permitted to carry a 2,000 watt continuous load.