CONCRETE BATCH PLANT OPERATOR EXAM (FDOT) QUESTIONS WITH CORRECT ANSWERS 2026

CONCRETE BATCH PLANT OPERATOR EXAM (FDOT)
QUESTIONS WITH CORRECT ANSWERS 2026

Stockpiles of aggregate shall be maintained in a well-drained condition in order to: -
CORRECT ANSWER -Minimize Free Water Content



Coarse aggregate stockpiles must be sprinkled for at lest how many hours prior to batch for FDOT
? - CORRECT ANSWER -24



Free moisture of the aggregate means: - CORRECT ANSWER -
Moister on the surface of an aggregate that is above and beyond the absorbed moister in the agg
regate.



If the moister test is done other than by the cook-
out method, how often shall the other methods be verified? - CORRECT ANSWER -Each week



For drill shaft concrete, the quantity of cement replaced with fly ash shall be: -
CORRECT ANSWER -33 thru 37%



In concrete, which material has a specific gravity of one? - CORRECT ANSWER -Water



What is the air content range for all classes of structural concrete except Class IV Shaft? -
CORRECT ANSWER -1.00 thru 6.00%



When can unmetered water be added toEthe concrete? - CORRECT ANSWER -Not at all.



Do not allow the total number of revolution at mixing speed to exceed: - CORRECT ANSWER -
160 Revolutions

, After all materials have been charged into the transit mixer drum, the concrete must be mixed at how
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many revolutions at the plant before leaving for the project? - CORRECT ANSWER -70 to 100
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When the water meters / scales are calibrated, prior to production, at whatEfrequency should the y b
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e checked there after? - CORRECT ANSWER -3 moths
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To what accuracy should the scales for weighing cement , pozzolan, slag and aggregates at the pl ant b
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e maintained - CORRECT ANSWER -0.5% of maximum load normally handled
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For concrete containing a water-
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reducingEretarding admixture, in an agitator truck, the maximum time for depositing the concret e s X2 X2 X2 X2 X2 X2 X2 X2 X2 X2 X2 X2 X2 X2




hall not exceed: - CORRECT ANSWER -90 minutes
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If a load of concrete has been rejected due to excessive slump, the concrete may remain in the tr ansporti
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ng vehicle to reduce the slump. - CORRECT ANSWER -Is not allowed.
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Who places the orders for concrete with the producer? - CORRECT ANSWER -The contractor
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The minimum normal sampling frequency for the chloride content of structural concrete is: -
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CORRECT ANSWER -
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1 per design mix in use from the first day of production and every 30 calendar days or less therea fter.
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In what moister condition are the aggregates on the approved concrete mix designs? -
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CORRECT ANSWER -SSD condition
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The specific gravity of an aggregate is the ratio of its unit weight to the weight of an equal absolu te vo
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lume of: - CORRECT ANSWER -Water X2 X2 X2 X2 X2