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CONCRETE BATCH PLANT OPERATOR
CERTIFICATION (FDOT) EXAM QUESTIONS
WITH SOLUTIONS
Question 1
Stockpiles of aggregate shall be maintained in a well-drained condition in order
to:
A. Increase absorption
B. Minimize free water content
C. Improve gradation
D. Reduce specific gravity
Correct Answer: B
Rationale: Well-drained stockpiles minimize free water content, which is essential
for accurate batching and water-cementitious ratio control. Free moisture is the
moisture on the surface of the aggregate above and beyond absorbed moisture.
Question 2
Coarse aggregate stockpiles must be sprinkled for at least how many hours prior
to batch for FDOT?
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A. 12 hours
B. 24 hours
C. 36 hours
D. 48 hours
Correct Answer: B
Rationale: Coarse aggregate stockpiles must be sprinkled for at least 24 hours
prior to batching for FDOT projects to ensure proper moisture conditioning.
Question 3
Free moisture of the aggregate means:
A. Moisture absorbed into the aggregate pores
B. Moisture on the surface of an aggregate that is above and beyond the
absorbed moisture
C. Total moisture content of the aggregate
D. Moisture added during batching
Correct Answer: B
Rationale: Free moisture is the moisture on the surface of an aggregate that is
above and beyond the absorbed moisture in the aggregate.
CONCRETE BATCH PLANT OPERATOR
CERTIFICATION (FDOT) EXAM QUESTIONS
WITH SOLUTIONS
Question 1
Stockpiles of aggregate shall be maintained in a well-drained condition in order
to:
A. Increase absorption
B. Minimize free water content
C. Improve gradation
D. Reduce specific gravity
Correct Answer: B
Rationale: Well-drained stockpiles minimize free water content, which is essential
for accurate batching and water-cementitious ratio control. Free moisture is the
moisture on the surface of the aggregate above and beyond absorbed moisture.
Question 2
Coarse aggregate stockpiles must be sprinkled for at least how many hours prior
to batch for FDOT?
, 2|Page
A. 12 hours
B. 24 hours
C. 36 hours
D. 48 hours
Correct Answer: B
Rationale: Coarse aggregate stockpiles must be sprinkled for at least 24 hours
prior to batching for FDOT projects to ensure proper moisture conditioning.
Question 3
Free moisture of the aggregate means:
A. Moisture absorbed into the aggregate pores
B. Moisture on the surface of an aggregate that is above and beyond the
absorbed moisture
C. Total moisture content of the aggregate
D. Moisture added during batching
Correct Answer: B
Rationale: Free moisture is the moisture on the surface of an aggregate that is
above and beyond the absorbed moisture in the aggregate.
