AL CC CONCRETE CONSTRUCTION CONTRACTOR
EXAM QUESTIONS AND CORRECT ANSWERS
(VERIFED ANSWERS) Q&A 2027 |INSTANT
DOWNLOAD PDF
1. What is the primary binding material in ordinary Portland
cement concrete?
A. Fine aggregate
B. Portland cement
C. Coarse aggregate
D. Water
Correct Answer: B. Portland cement
Rationale: Portland cement reacts chemically with water
through hydration and binds the aggregate together to form
concrete.
2. What is the main purpose of water in a concrete mixture?
A. To increase aggregate size
B. To hydrate the cement and provide workability
C. To prevent all shrinkage
D. To replace cement
Correct Answer: B. To hydrate the cement and provide
workability
,Rationale: Water is necessary for cement hydration and helps
make the mixture workable enough to place and finish.
3. Which material normally makes up the largest volume of
concrete?
A. Cement
B. Water
C. Aggregate
D. Admixture
Correct Answer: C. Aggregate
Rationale: Fine and coarse aggregates generally constitute the
majority of concrete's volume and provide dimensional
stability.
4. What is the water-cement ratio?
A. Ratio of aggregate to water
B. Ratio of cement weight to aggregate weight
C. Ratio of water weight to cementitious material weight
D. Ratio of sand to gravel
Correct Answer: C. Ratio of water weight to cementitious
material weight
Rationale: The water-cementitious materials ratio strongly
affects concrete strength, durability, and permeability.
,5. What generally happens when excessive water is added to
concrete?
A. Strength usually increases
B. Strength and durability can decrease
C. Cement hydration stops
D. Aggregate becomes stronger
Correct Answer: B. Strength and durability can decrease
Rationale: Excess water can increase porosity after
evaporation, reducing strength and increasing permeability and
shrinkage.
6. What is the primary purpose of coarse aggregate in
concrete?
A. Provide bulk and dimensional stability
B. Hydrate cement
C. Replace reinforcement
D. Prevent cement hydration
Correct Answer: A. Provide bulk and dimensional stability
Rationale: Coarse aggregate forms a major portion of the
concrete mass and helps reduce cement demand and
dimensional changes.
, 7. What is fine aggregate commonly called?
A. Gravel
B. Sand
C. Slag
D. Cement
Correct Answer: B. Sand
Rationale: Fine aggregate generally consists of particles passing
the applicable sieve size and is commonly natural or
manufactured sand.
8. What does concrete slump primarily measure?
A. Compressive strength
B. Air content
C. Consistency and workability
D. Cement content
Correct Answer: C. Consistency and workability
Rationale: The slump test provides an indication of the
consistency of freshly mixed concrete.
9. Which test is commonly used to determine concrete
compressive strength?
A. Slump test
B. Compression test of molded specimens
EXAM QUESTIONS AND CORRECT ANSWERS
(VERIFED ANSWERS) Q&A 2027 |INSTANT
DOWNLOAD PDF
1. What is the primary binding material in ordinary Portland
cement concrete?
A. Fine aggregate
B. Portland cement
C. Coarse aggregate
D. Water
Correct Answer: B. Portland cement
Rationale: Portland cement reacts chemically with water
through hydration and binds the aggregate together to form
concrete.
2. What is the main purpose of water in a concrete mixture?
A. To increase aggregate size
B. To hydrate the cement and provide workability
C. To prevent all shrinkage
D. To replace cement
Correct Answer: B. To hydrate the cement and provide
workability
,Rationale: Water is necessary for cement hydration and helps
make the mixture workable enough to place and finish.
3. Which material normally makes up the largest volume of
concrete?
A. Cement
B. Water
C. Aggregate
D. Admixture
Correct Answer: C. Aggregate
Rationale: Fine and coarse aggregates generally constitute the
majority of concrete's volume and provide dimensional
stability.
4. What is the water-cement ratio?
A. Ratio of aggregate to water
B. Ratio of cement weight to aggregate weight
C. Ratio of water weight to cementitious material weight
D. Ratio of sand to gravel
Correct Answer: C. Ratio of water weight to cementitious
material weight
Rationale: The water-cementitious materials ratio strongly
affects concrete strength, durability, and permeability.
,5. What generally happens when excessive water is added to
concrete?
A. Strength usually increases
B. Strength and durability can decrease
C. Cement hydration stops
D. Aggregate becomes stronger
Correct Answer: B. Strength and durability can decrease
Rationale: Excess water can increase porosity after
evaporation, reducing strength and increasing permeability and
shrinkage.
6. What is the primary purpose of coarse aggregate in
concrete?
A. Provide bulk and dimensional stability
B. Hydrate cement
C. Replace reinforcement
D. Prevent cement hydration
Correct Answer: A. Provide bulk and dimensional stability
Rationale: Coarse aggregate forms a major portion of the
concrete mass and helps reduce cement demand and
dimensional changes.
, 7. What is fine aggregate commonly called?
A. Gravel
B. Sand
C. Slag
D. Cement
Correct Answer: B. Sand
Rationale: Fine aggregate generally consists of particles passing
the applicable sieve size and is commonly natural or
manufactured sand.
8. What does concrete slump primarily measure?
A. Compressive strength
B. Air content
C. Consistency and workability
D. Cement content
Correct Answer: C. Consistency and workability
Rationale: The slump test provides an indication of the
consistency of freshly mixed concrete.
9. Which test is commonly used to determine concrete
compressive strength?
A. Slump test
B. Compression test of molded specimens
