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ACI Concrete Finisher Test (Difficult Questions) ALL QUESTIONS AND 100%
CORRECT ANSWERS ALREADY GRADED A+ - LATEST UPDATE 2026
Question 1
Which of the following is the primary purpose of a concrete finisher?
A. Pouring concrete only
B. Placing, finishing, and curing concrete
C. Ordering materials
D. Supervising electricians
Correct Answer: B
Rationale:
A concrete finisher is responsible for placing, leveling, finishing, and curing concrete to meet
specifications.
Question 2
What is the main reason for finishing concrete?
A. To make it easier to transport
B. To ensure durability, proper smoothness, and aesthetics
C. To reduce curing time
D. To increase water content
Correct Answer: B
Rationale:
Finishing improves surface appearance, ensures durability, and prevents cracking.
Question 3
Which tool is used to level freshly placed concrete?
A. Float
B. Bull float
UPDATED exam 2026
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C. Trowel
D. Edger
Correct Answer: B
Rationale:
A bull float is used to smooth and level large areas of freshly poured concrete.
Question 4
Why is proper curing of concrete important?
A. It accelerates setting
B. It prevents cracking and ensures strength development
C. It allows for early removal of forms
D. It reduces slump
Correct Answer: B
Rationale:
Curing maintains moisture in concrete, allowing hydration to continue, which increases strength
and durability.
Question 5
What is “bleeding” in concrete?
A. Loss of cement paste during transport
B. Water rising to the surface of freshly placed concrete
C. Cracks forming on curing concrete
D. Settling of coarse aggregate
Correct Answer: B
Rationale:
Bleeding occurs when excess water in fresh concrete rises to the surface, which can affect
finishing and bonding.
Question 6
Which type of trowel is best for final finishing on a concrete slab?
UPDATED exam 2026
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A. Margin trowel
B. Float
C. Steel trowel
D. Edger
Correct Answer: C
Rationale:
A steel trowel provides a smooth, hard surface for the final finish.
Question 7
What is the typical water-to-cement ratio for most structural concrete?
A. 0.2–0.3
B. 0.4–0.6
C. 0.7–0.9
D. 1.0–1.2
Correct Answer: B
Rationale:
A 0.4–0.6 water-to-cement ratio provides workability while ensuring proper strength.
Question 8
Which concrete finishing technique creates grooves to prevent slipping?
A. Broom finish
B. Steel trowel finish
C. Float finish
D. Edging
Correct Answer: A
Rationale:
A broom finish leaves small grooves in the concrete to provide slip resistance.
Question 9
Which factor most influences concrete setting time?
UPDATED exam 2026
ACI Concrete Finisher Test (Difficult Questions) ALL QUESTIONS AND 100%
CORRECT ANSWERS ALREADY GRADED A+ - LATEST UPDATE 2026
Question 1
Which of the following is the primary purpose of a concrete finisher?
A. Pouring concrete only
B. Placing, finishing, and curing concrete
C. Ordering materials
D. Supervising electricians
Correct Answer: B
Rationale:
A concrete finisher is responsible for placing, leveling, finishing, and curing concrete to meet
specifications.
Question 2
What is the main reason for finishing concrete?
A. To make it easier to transport
B. To ensure durability, proper smoothness, and aesthetics
C. To reduce curing time
D. To increase water content
Correct Answer: B
Rationale:
Finishing improves surface appearance, ensures durability, and prevents cracking.
Question 3
Which tool is used to level freshly placed concrete?
A. Float
B. Bull float
UPDATED exam 2026
,2|Page
C. Trowel
D. Edger
Correct Answer: B
Rationale:
A bull float is used to smooth and level large areas of freshly poured concrete.
Question 4
Why is proper curing of concrete important?
A. It accelerates setting
B. It prevents cracking and ensures strength development
C. It allows for early removal of forms
D. It reduces slump
Correct Answer: B
Rationale:
Curing maintains moisture in concrete, allowing hydration to continue, which increases strength
and durability.
Question 5
What is “bleeding” in concrete?
A. Loss of cement paste during transport
B. Water rising to the surface of freshly placed concrete
C. Cracks forming on curing concrete
D. Settling of coarse aggregate
Correct Answer: B
Rationale:
Bleeding occurs when excess water in fresh concrete rises to the surface, which can affect
finishing and bonding.
Question 6
Which type of trowel is best for final finishing on a concrete slab?
UPDATED exam 2026
, 3|Page
A. Margin trowel
B. Float
C. Steel trowel
D. Edger
Correct Answer: C
Rationale:
A steel trowel provides a smooth, hard surface for the final finish.
Question 7
What is the typical water-to-cement ratio for most structural concrete?
A. 0.2–0.3
B. 0.4–0.6
C. 0.7–0.9
D. 1.0–1.2
Correct Answer: B
Rationale:
A 0.4–0.6 water-to-cement ratio provides workability while ensuring proper strength.
Question 8
Which concrete finishing technique creates grooves to prevent slipping?
A. Broom finish
B. Steel trowel finish
C. Float finish
D. Edging
Correct Answer: A
Rationale:
A broom finish leaves small grooves in the concrete to provide slip resistance.
Question 9
Which factor most influences concrete setting time?
UPDATED exam 2026
