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CSLB C-12 Earthwork and Paving (Trade Exam) Exam Cheat Sheet (2026)
A free, printable CSLB C-12 Earthwork and Paving (Trade Exam) exam cheat sheet: the 31 highest-yield points to know, grouped into 4 sections that follow the exam's content areas, each section with its published weight.
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- The real CSLB C-12 Earthwork and Paving (Trade Exam) exam: 210 minutes.
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- 250 free CSLB C-12 Earthwork and Paving (Trade Exam) practice questions on the same material, every one explained.
- Last updated: November 2026.
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Planning and Estimating
20% of the exam- Layer thickness
- State specifications write thickness in feet: 0.5 foot is 6 inches and 0.15 foot is 1.8 inches.· Caltrans 2024 Standard Specifications §26-1.03D
- Grading plane under hot mix
- Within 0.05 foot above or below the established grade; under concrete it may not extend above grade.· Caltrans 2024 Standard Specifications §19-1.03C
- Utility notice
- Notify at least 2 working days before digging and receive positive responses from known owner-operators.· 8 CCR §1541(b)
- Overhead lines
- 600 to 50,000 volts: 6 feet general clearance, 10 feet for boom-type equipment and material storage.· 8 CCR §2946, Tables 1 and 2
- Permits
- An excavation 5 feet or deeper that a person must enter needs an annual or project permit; one acre or more of disturbance needs stormwater coverage.· 8 CCR §341(d)(5); SWRCB Order WQ 2022-0057-DWQ
- Tonnage
- Tons = volume in cubic feet times unit weight in pounds per cubic foot, divided by 2,000.· Estimating practice
- Tack coat
- Minimum residual rates are 0.02, 0.03 and 0.05 gallon per square yard for new hot mix, existing pavement and planed pavement.· Caltrans 2024 Standard Specifications §39-2.01C(3)(f)
- Levels
- HI = benchmark + backsight; ground elevation = HI - foresight.· Surveying practice
- Class 2 aggregate base
- Minimum R-value 78, sand equivalent 22 and durability index 35 for contract compliance.· Caltrans 2024 Standard Specifications §26-1.02B
Earthwork and Grade Control
29% of the exam- Base grade
- The finished aggregate base surface is within 0.05 foot of the established grade.· Caltrans 2024 Standard Specifications §26-1.03E
- Curb and gutter
- Flat to within 0.01 foot under a 10-foot straightedge.· Caltrans 2024 Standard Specifications §73-2.03A
- Soil types
- Type A is cohesive soil of 1.5 tons per square foot or more with no disqualifiers; sand and submerged soil are Type C.· 8 CCR §1541.1 Appendix A
- Relative compaction
- Field dry density divided by laboratory maximum dry density, times 100.· Caltrans 2024 Standard Specifications §19-5
- Maximum slopes
- Under 20 feet deep: Type A 3/4:1, Type B 1:1, Type C 1-1/2:1; more than 20 feet needs an engineer.· 8 CCR §1541.1 Appendix B
- Edges and egress
- Ladders within 25 feet of lateral travel at 4 feet deep or more; spoil at least 2 feet from the edge.· 8 CCR §1541(c)(2), (j)(2)
- Embankment
- Lifts of 8 inches loose at most; 95 percent in the defined zones and 90 percent elsewhere.· Caltrans 2024 Standard Specifications §19-5, §19-6
- Aggregate base
- Each layer to 95 percent; no compacted layer thicker than 0.50 foot.· Caltrans 2024 Standard Specifications §26-1.03
Paving
30% of the exam- Placement temperatures
- Unmodified binder: 55°F air and 60°F surface for lifts under 0.15 foot; 45°F and 50°F for lifts of 0.15 foot or more.· Caltrans 2024 Standard Specifications §39-2.02C
- Concrete pavement
- Consecutive loads within 30 minutes; 40°F surface for 72 hours; 550 psi before traffic.· Caltrans 2024 Standard Specifications §40-1.03
- Slopes
- Running slope 1:20, cross slope 1:48, ramp slope 1:12 with 30-inch maximum rise per run.· 2025 CBC §11B-403.3, §11B-405
- California parking
- Car spaces 108 inches wide, van spaces 144 inches wide, access aisle 60 inches.· 2025 CBC §11B-502
- Weather windows
- Fog seal 60°F; slurry seal 50°F; chip seal 65 to 110°F air and 80°F surface.· Caltrans 2024 Standard Specifications §37
- Permeable pavement
- Do not compact the subgrade; keep sediment out of the base.· U.S. EPA, Stormwater BMP: Permeable Pavements
- Saw cuts
- 2 inches deep before removing asphalt; 1-1/2 inches deep at concrete contraction joints before removing curb or sidewalk.· Caltrans 2024 Standard Specifications §39-3.01C, §73-10.03
- Opening to traffic
- Hot mix below 160°F at mid-depth; concrete pavement at 550 psi modulus of rupture.· Caltrans 2024 Standard Specifications §39-2.01C(15), §40-1.03J
Safety
21% of the exam- Tailgate meetings
- At least every 10 working days.· 8 CCR §1509(e)
- Heat
- Shade above 80°F; high-heat procedures at 95°F; one quart of water per employee per hour.· 8 CCR §3395
- Stormwater permit
- One acre or more, or part of a larger common plan; a QSD writes the SWPPP and a QSP implements it.· SWRCB Order WQ 2022-0057-DWQ
- Concrete washout
- At least 50 feet from storm drains and watercourses; not over 75 percent full; covered before and during storms.· Caltrans 2024 Standard Specifications §13-9.03
- Taper length
- L = WS²/60 at 40 mph or less; L = WS at 45 mph or more; shifting taper 0.5 L; shoulder taper 0.33 L.· California MUTCD 2026 Edition, Tables 6B-3 and 6B-4
- Flaggers
- STOP/SLOW paddle, trained, visible garments; retroreflective material visible at 1,000 feet at night.· 8 CCR §1599; California MUTCD 2026 Edition §6D.05
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