Concrete Contractor Exam (C-8) Actual
Exam and Practice Tests Newest with
Complete Questions and Correct
Detailed Answers| Brand New Version!
1. What is the primary ingredient in Portland cement?
A. Sand
B. Limestone
C. Gravel
D. Clay soil
Answer: B
Rationale: Limestone is the principal raw material used in manufacturing Portland
cement.
2. What is the primary function of cement in concrete?
A. Provide aggregate strength
B. Bind ingredients together
C. Reduce curing time only
D. Prevent cracking completely
Answer: B
Rationale: Cement acts as the binder that holds aggregates together.
3. Which ingredient makes up the largest volume of concrete?
A. Cement
B. Water
C. Aggregate
D. Admixture
Answer: C
Rationale: Aggregates typically comprise the majority of concrete volume.
,4. What is the purpose of water in a concrete mix?
A. Color the concrete
B. Start the hydration process
C. Replace cement
D. Increase aggregate size
Answer: B
Rationale: Water reacts chemically with cement during hydration.
5. What is hydration?
A. Drying of concrete
B. Chemical reaction between cement and water
C. Addition of aggregate
D. Surface finishing process
Answer: B
Rationale: Hydration is the chemical process that causes concrete to harden.
6. What is the typical unit used to measure concrete strength?
A. PSI
B. Inches
C. Gallons
D. Pounds per foot
Answer: A
Rationale: Concrete compressive strength is commonly measured in pounds per
square inch (PSI).
7. What test is commonly used to measure concrete consistency?
A. Slump test
B. Density test
C. Load test
D. Sieve test
Answer: A
, Rationale: The slump test measures the workability and consistency of fresh
concrete.
8. What does a high slump generally indicate?
A. Less workable concrete
B. More workable concrete
C. Higher strength only
D. Larger aggregate size
Answer: B
Rationale: Higher slump generally indicates increased workability.
9. What is the purpose of reinforcing steel in concrete?
A. Increase tensile strength
B. Reduce cement content
C. Increase slump
D. Improve color
Answer: A
Rationale: Reinforcing steel helps concrete resist tensile forces.
10. What is the common name for reinforcing steel bars?
A. Mesh
B. Rebar
C. Screed
D. Formwork
Answer: B
Rationale: Reinforcing bars are commonly called rebar.
11. What is the primary strength characteristic of concrete?
A. Tensile strength
B. Flexural strength
C. Compressive strength
D. Shear strength
Exam and Practice Tests Newest with
Complete Questions and Correct
Detailed Answers| Brand New Version!
1. What is the primary ingredient in Portland cement?
A. Sand
B. Limestone
C. Gravel
D. Clay soil
Answer: B
Rationale: Limestone is the principal raw material used in manufacturing Portland
cement.
2. What is the primary function of cement in concrete?
A. Provide aggregate strength
B. Bind ingredients together
C. Reduce curing time only
D. Prevent cracking completely
Answer: B
Rationale: Cement acts as the binder that holds aggregates together.
3. Which ingredient makes up the largest volume of concrete?
A. Cement
B. Water
C. Aggregate
D. Admixture
Answer: C
Rationale: Aggregates typically comprise the majority of concrete volume.
,4. What is the purpose of water in a concrete mix?
A. Color the concrete
B. Start the hydration process
C. Replace cement
D. Increase aggregate size
Answer: B
Rationale: Water reacts chemically with cement during hydration.
5. What is hydration?
A. Drying of concrete
B. Chemical reaction between cement and water
C. Addition of aggregate
D. Surface finishing process
Answer: B
Rationale: Hydration is the chemical process that causes concrete to harden.
6. What is the typical unit used to measure concrete strength?
A. PSI
B. Inches
C. Gallons
D. Pounds per foot
Answer: A
Rationale: Concrete compressive strength is commonly measured in pounds per
square inch (PSI).
7. What test is commonly used to measure concrete consistency?
A. Slump test
B. Density test
C. Load test
D. Sieve test
Answer: A
, Rationale: The slump test measures the workability and consistency of fresh
concrete.
8. What does a high slump generally indicate?
A. Less workable concrete
B. More workable concrete
C. Higher strength only
D. Larger aggregate size
Answer: B
Rationale: Higher slump generally indicates increased workability.
9. What is the purpose of reinforcing steel in concrete?
A. Increase tensile strength
B. Reduce cement content
C. Increase slump
D. Improve color
Answer: A
Rationale: Reinforcing steel helps concrete resist tensile forces.
10. What is the common name for reinforcing steel bars?
A. Mesh
B. Rebar
C. Screed
D. Formwork
Answer: B
Rationale: Reinforcing bars are commonly called rebar.
11. What is the primary strength characteristic of concrete?
A. Tensile strength
B. Flexural strength
C. Compressive strength
D. Shear strength
