CALIFORNIA CONCRETE CONTRACTOR (C-8) LICENSE EXAM – ACTUAL EXAM
PRACTICE QUESTIONS AND 100% VERIFIED CORRECT ANSWERS | COMPLETE
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Core Domains
Planning and Estimation
Formwork and Reinforcement
Concrete Placement and Finishing
Repair and Restoration
Safety and Heavy Equipment
Business and California Building Code Compliance
The purpose of this examination is to evaluate the technical proficiency and regulatory
knowledge required for a C-8 Concrete Contractor license in California. This assessment
covers critical phases of concrete construction, from site preparation and moisture
barriers to specialized finishing techniques and structural repairs. Candidates are
evaluated through a mix of multiple-choice and scenario-based questions that mirror real-
world job site challenges. The exam places heavy emphasis on practical application,
professional decision-making, and adherence to Cal/OSHA safety standards and the
,California Building Code to ensure structural integrity and public safety in all concrete
installations.
SECTION 1: QUESTIONS 1–35
1. When calculating the volume of concrete required for a slab that is 40 feet long, 20
feet wide, and 4 inches thick, how many cubic yards should be ordered (excluding
waste)?
A. 8.44 cubic yards
🔴 B. 9.88 cubic yards
C. 11.25 cubic yards
D. 12.50 cubic yards
🔵 Explanation: Calculation: (40 x 20 x 0.333) / 27 = 9.876. Rounding to 9.88 cubic
yards is the standard for volume estimation.
2. According to California Building Code, what is the minimum required thickness for a
residential concrete driveway?
A. 3 inches
🔴 B. 3.5 inches
C. 4 inches
D. 5 inches
, 🔵 Explanation: Standard residential code typically requires a minimum of 3.5 inches
for driveways, though local ordinances may require 4 inches.
3. Which of the following is the primary purpose of a vapor barrier installed under a
concrete slab-on-grade?
A. To increase the compressive strength of the concrete
B. To prevent the concrete from drying too quickly
🔴 C. To stop moisture from migrating through the slab into the building
D. To provide a level surface for the pour
🔵 Explanation: Vapor barriers (usually poly sheeting) prevent capillary action and
moisture vapor from damaging floor finishes inside the structure.
4. What is the maximum height a worker can stand on a regular stepladder to perform
formwork?
A. The top cap
B. The first step from the top
🔴 C. The second step from the top
D. The third step from the top
🔵 Explanation: Cal/OSHA safety regulations prohibit standing on the top two steps
(the top cap and the step below it) of a stepladder.
, 5. In reinforcement, what does the "clear cover" refer to?
A. The thickness of the vapor barrier
🔴 B. The distance between the edge of the concrete and the surface of the rebar
C. The total diameter of the rebar cage
D. The amount of plastic sheeting used for curing
🔵 Explanation: Clear cover ensures that the reinforcement is protected from
corrosion and provides adequate fire resistance.
6. Which type of cement is specifically formulated for use in environments with high
sulfate soil conditions?
A. Type I
B. Type III
🔴 C. Type V
D. Type IV
🔵 Explanation: Type V cement is high sulfate-resistant, which is essential in many
California regions where soil chemistry can degrade standard concrete.
7. What is the primary cause of "crazing" on a concrete surface?
🔴 B. Rapid evaporation of surface moisture
C. Excessive use of large aggregates
D. Lack of air entrainment
PRACTICE QUESTIONS AND 100% VERIFIED CORRECT ANSWERS | COMPLETE
EXAM PREP TESTBANK | GUARANTEED PASS | INSTANT DOWNLOAD PDF
Core Domains
Planning and Estimation
Formwork and Reinforcement
Concrete Placement and Finishing
Repair and Restoration
Safety and Heavy Equipment
Business and California Building Code Compliance
The purpose of this examination is to evaluate the technical proficiency and regulatory
knowledge required for a C-8 Concrete Contractor license in California. This assessment
covers critical phases of concrete construction, from site preparation and moisture
barriers to specialized finishing techniques and structural repairs. Candidates are
evaluated through a mix of multiple-choice and scenario-based questions that mirror real-
world job site challenges. The exam places heavy emphasis on practical application,
professional decision-making, and adherence to Cal/OSHA safety standards and the
,California Building Code to ensure structural integrity and public safety in all concrete
installations.
SECTION 1: QUESTIONS 1–35
1. When calculating the volume of concrete required for a slab that is 40 feet long, 20
feet wide, and 4 inches thick, how many cubic yards should be ordered (excluding
waste)?
A. 8.44 cubic yards
🔴 B. 9.88 cubic yards
C. 11.25 cubic yards
D. 12.50 cubic yards
🔵 Explanation: Calculation: (40 x 20 x 0.333) / 27 = 9.876. Rounding to 9.88 cubic
yards is the standard for volume estimation.
2. According to California Building Code, what is the minimum required thickness for a
residential concrete driveway?
A. 3 inches
🔴 B. 3.5 inches
C. 4 inches
D. 5 inches
, 🔵 Explanation: Standard residential code typically requires a minimum of 3.5 inches
for driveways, though local ordinances may require 4 inches.
3. Which of the following is the primary purpose of a vapor barrier installed under a
concrete slab-on-grade?
A. To increase the compressive strength of the concrete
B. To prevent the concrete from drying too quickly
🔴 C. To stop moisture from migrating through the slab into the building
D. To provide a level surface for the pour
🔵 Explanation: Vapor barriers (usually poly sheeting) prevent capillary action and
moisture vapor from damaging floor finishes inside the structure.
4. What is the maximum height a worker can stand on a regular stepladder to perform
formwork?
A. The top cap
B. The first step from the top
🔴 C. The second step from the top
D. The third step from the top
🔵 Explanation: Cal/OSHA safety regulations prohibit standing on the top two steps
(the top cap and the step below it) of a stepladder.
, 5. In reinforcement, what does the "clear cover" refer to?
A. The thickness of the vapor barrier
🔴 B. The distance between the edge of the concrete and the surface of the rebar
C. The total diameter of the rebar cage
D. The amount of plastic sheeting used for curing
🔵 Explanation: Clear cover ensures that the reinforcement is protected from
corrosion and provides adequate fire resistance.
6. Which type of cement is specifically formulated for use in environments with high
sulfate soil conditions?
A. Type I
B. Type III
🔴 C. Type V
D. Type IV
🔵 Explanation: Type V cement is high sulfate-resistant, which is essential in many
California regions where soil chemistry can degrade standard concrete.
7. What is the primary cause of "crazing" on a concrete surface?
🔴 B. Rapid evaporation of surface moisture
C. Excessive use of large aggregates
D. Lack of air entrainment
