ACI Concrete Flatwork Technician Exam Questions
and Correct Answers Verified Answers) Plus
Rationales 2026 Q&A | Instant Download Pdf
1. What is the primary purpose of concrete consolidation?
A. Increase cement content
B. Remove entrapped air and improve density
C. Speed up curing time
D. Reduce water content
Answer: B
Rationale: Consolidation removes air pockets and ensures proper
bonding and strength development.
2. What is the typical slump range for flatwork concrete?
A. 0–1 in
B. 1–2 in
C. 2–5 in
D. 6–10 in
,Answer: C
Rationale: Flatwork commonly uses a 2–5 inch slump for workability
and finishability.
3. What tool is commonly used for initial leveling of concrete?
A. Float
B. Trowel
C. Screed
D. Broom
Answer: C
Rationale: Screeds are used to strike off and level freshly placed
concrete.
4. What happens if too much water is added to concrete?
A. Increased strength
B. Reduced shrinkage
C. Decreased strength and durability
D. Faster curing
Answer: C
Rationale: Excess water increases porosity and weakens concrete.
,5. What is bleeding in concrete?
A. Cement separation
B. Water rising to the surface
C. Aggregate sinking
D. Air entrainment
Answer: B
Rationale: Bleeding occurs when water rises to the surface after
placement.
6. What is the purpose of a bull float?
A. Remove forms
B. Smooth and embed aggregate after screeding
C. Cut joints
D. Measure slump
Answer: B
Rationale: A bull float levels and smooths the surface after screeding.
7. What is the minimum recommended curing period for concrete?
, A. 1 day
B. 3 days
C. 7 days
D. 28 days
Answer: C
Rationale: At least 7 days of curing is generally required for strength
development.
8. What is the purpose of curing concrete?
A. Reduce cost
B. Prevent cracking and ensure hydration
C. Speed finishing
D. Remove cement
Answer: B
Rationale: Curing maintains moisture for proper hydration and strength
gain.
9. What is a cold joint?
A. Joint formed in freezing weather
B. Joint between two layers of hardened concrete
and Correct Answers Verified Answers) Plus
Rationales 2026 Q&A | Instant Download Pdf
1. What is the primary purpose of concrete consolidation?
A. Increase cement content
B. Remove entrapped air and improve density
C. Speed up curing time
D. Reduce water content
Answer: B
Rationale: Consolidation removes air pockets and ensures proper
bonding and strength development.
2. What is the typical slump range for flatwork concrete?
A. 0–1 in
B. 1–2 in
C. 2–5 in
D. 6–10 in
,Answer: C
Rationale: Flatwork commonly uses a 2–5 inch slump for workability
and finishability.
3. What tool is commonly used for initial leveling of concrete?
A. Float
B. Trowel
C. Screed
D. Broom
Answer: C
Rationale: Screeds are used to strike off and level freshly placed
concrete.
4. What happens if too much water is added to concrete?
A. Increased strength
B. Reduced shrinkage
C. Decreased strength and durability
D. Faster curing
Answer: C
Rationale: Excess water increases porosity and weakens concrete.
,5. What is bleeding in concrete?
A. Cement separation
B. Water rising to the surface
C. Aggregate sinking
D. Air entrainment
Answer: B
Rationale: Bleeding occurs when water rises to the surface after
placement.
6. What is the purpose of a bull float?
A. Remove forms
B. Smooth and embed aggregate after screeding
C. Cut joints
D. Measure slump
Answer: B
Rationale: A bull float levels and smooths the surface after screeding.
7. What is the minimum recommended curing period for concrete?
, A. 1 day
B. 3 days
C. 7 days
D. 28 days
Answer: C
Rationale: At least 7 days of curing is generally required for strength
development.
8. What is the purpose of curing concrete?
A. Reduce cost
B. Prevent cracking and ensure hydration
C. Speed finishing
D. Remove cement
Answer: B
Rationale: Curing maintains moisture for proper hydration and strength
gain.
9. What is a cold joint?
A. Joint formed in freezing weather
B. Joint between two layers of hardened concrete
