Certified Concrete Finisher Exam
Practice Test Questions And Correct
Answers (Verified Answers) Plus
Rationales 2026 Q&A Instant Download
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1. What is the primary purpose of curing concrete?
A) Increase color
B) Reduce cost
C) Maintain moisture for strength gain
D) Speed up demolition
Answer: Maintain moisture for strength gain
Rationale: Curing retains moisture so hydration continues, increasing
concrete strength and durability.
2. Which tool is commonly used to level freshly placed concrete?
A) Hammer
B) Float
C) Screed board
D) Trowel
Answer: Screed board
Rationale: A screed is used to strike off excess concrete and level the
surface.
,3. What is the minimum temperature for placing concrete without cold
weather protection?
A) 0°C
B) 5°C
C) 10°C
D) 20°C
Answer: 10°C
Rationale: Concrete should generally be placed above 10°C to ensure
proper hydration.
4. What causes plastic shrinkage cracks?
A) Excess cement
B) Overwatering mix
C) Rapid surface moisture loss
D) Low slump
Answer: Rapid surface moisture loss
Rationale: Wind, heat, and low humidity cause rapid evaporation before
set.
5. What is slump test used to measure?
A) Strength
B) Air content
C) Workability
D) Density
Answer: Workability
Rationale: Slump measures the consistency and flow of fresh concrete.
6. Which admixture accelerates setting time?
A) Retarder
, B) Air entrainer
C) Plasticizer
D) Accelerator
Answer: Accelerator
Rationale: Accelerators speed up hydration and early strength gain.
7. What is the typical water-cement ratio range for structural concrete?
A) 0.10–0.20
B) 0.25–0.35
C) 0.40–0.60
D) 0.80–1.0
Answer: 0.40–0.60
Rationale: This range balances strength and workability.
8. What is the function of a bull float?
A) Cut joints
B) Finish edges
C) Smooth and level surface
D) Mix concrete
Answer: Smooth and level surface
Rationale: Bull floats flatten ridges and embed aggregate just after
screeding.
9. What is segregation in concrete?
A) Chemical reaction
B) Separation of coarse aggregate from mortar
C) Water evaporation
D) Hardening process
Answer: Separation of coarse aggregate from mortar
Rationale: Segregation weakens concrete uniformity.
Practice Test Questions And Correct
Answers (Verified Answers) Plus
Rationales 2026 Q&A Instant Download
1. What is the primary purpose of curing concrete?
A) Increase color
B) Reduce cost
C) Maintain moisture for strength gain
D) Speed up demolition
Answer: Maintain moisture for strength gain
Rationale: Curing retains moisture so hydration continues, increasing
concrete strength and durability.
2. Which tool is commonly used to level freshly placed concrete?
A) Hammer
B) Float
C) Screed board
D) Trowel
Answer: Screed board
Rationale: A screed is used to strike off excess concrete and level the
surface.
,3. What is the minimum temperature for placing concrete without cold
weather protection?
A) 0°C
B) 5°C
C) 10°C
D) 20°C
Answer: 10°C
Rationale: Concrete should generally be placed above 10°C to ensure
proper hydration.
4. What causes plastic shrinkage cracks?
A) Excess cement
B) Overwatering mix
C) Rapid surface moisture loss
D) Low slump
Answer: Rapid surface moisture loss
Rationale: Wind, heat, and low humidity cause rapid evaporation before
set.
5. What is slump test used to measure?
A) Strength
B) Air content
C) Workability
D) Density
Answer: Workability
Rationale: Slump measures the consistency and flow of fresh concrete.
6. Which admixture accelerates setting time?
A) Retarder
, B) Air entrainer
C) Plasticizer
D) Accelerator
Answer: Accelerator
Rationale: Accelerators speed up hydration and early strength gain.
7. What is the typical water-cement ratio range for structural concrete?
A) 0.10–0.20
B) 0.25–0.35
C) 0.40–0.60
D) 0.80–1.0
Answer: 0.40–0.60
Rationale: This range balances strength and workability.
8. What is the function of a bull float?
A) Cut joints
B) Finish edges
C) Smooth and level surface
D) Mix concrete
Answer: Smooth and level surface
Rationale: Bull floats flatten ridges and embed aggregate just after
screeding.
9. What is segregation in concrete?
A) Chemical reaction
B) Separation of coarse aggregate from mortar
C) Water evaporation
D) Hardening process
Answer: Separation of coarse aggregate from mortar
Rationale: Segregation weakens concrete uniformity.
