Concrete Batch Plant Operator Exam
(FDOT) EXAM 2025 QUESTIONS AND
ANSWERS
Stockpiles of aggregate shall be maintained in a well-drained condition in order to: -
ANS Minimize Free Water Content
Coarse aggregate stockpiles must be sprinkled for at lest how many hours prior to batch for
FDOT? - ANS 24
Free moisture of the aggregate means: - ANS Moister on the surface of an aggregate that is
above and beyond the absorbed moister in the aggregate.
If the moister test is done other than by the cook-out method, how often shall the other
methods be verified? - ANS Each week
For drill shaft concrete, the quantity of cement replaced with fly ash shall be: - ANS 33 thru
37%
In concrete, which material has a specific gravity of one? - ANS Water
1
What is the air content range for all classes of structural concrete except Class IV Shaft? -
Page
ANS 1.00 thru 6.00%
@COPYRIGHT BRAINBARTER 2025/2026
, When can unmetered water be added to the concrete? - ANS Not at all.
Do not allow the total number of revolution at mixing speed to exceed: - ANS 160
Revolutions
After all materials have been charged into the transit mixer drum, the concrete must be mixed
at how many revolutions at the plant before leaving for the project? - ANS 70 to 100
When the water meters / scales are calibrated, prior to production, at what frequency should
they be checked there after? - ANS 3 moths
To what accuracy should the scales for weighing cement , pozzolan, slag and aggregates at the
plant be maintained - ANS 0.5% of maximum load normally handled
For concrete containing a water-reducing retarding admixture, in an agitator truck, the
maximum time for depositing the concrete shall not exceed: - ANS 90 minutes
If a load of concrete has been rejected due to excessive slump, the concrete may remain in the
transporting vehicle to reduce the slump. - ANS Is not allowed.
Who places the orders for concrete with the producer? - ANS The contractor
The minimum normal sampling frequency for the chloride content of structural concrete is: -
ANS 1 per design mix in use from the first day of production and every 30 calendar days or
less thereafter.
In what moister condition are the aggregates on the approved concrete mix designs? -
2
ANS SSD condition
Page
@COPYRIGHT BRAINBARTER 2025/2026
(FDOT) EXAM 2025 QUESTIONS AND
ANSWERS
Stockpiles of aggregate shall be maintained in a well-drained condition in order to: -
ANS Minimize Free Water Content
Coarse aggregate stockpiles must be sprinkled for at lest how many hours prior to batch for
FDOT? - ANS 24
Free moisture of the aggregate means: - ANS Moister on the surface of an aggregate that is
above and beyond the absorbed moister in the aggregate.
If the moister test is done other than by the cook-out method, how often shall the other
methods be verified? - ANS Each week
For drill shaft concrete, the quantity of cement replaced with fly ash shall be: - ANS 33 thru
37%
In concrete, which material has a specific gravity of one? - ANS Water
1
What is the air content range for all classes of structural concrete except Class IV Shaft? -
Page
ANS 1.00 thru 6.00%
@COPYRIGHT BRAINBARTER 2025/2026
, When can unmetered water be added to the concrete? - ANS Not at all.
Do not allow the total number of revolution at mixing speed to exceed: - ANS 160
Revolutions
After all materials have been charged into the transit mixer drum, the concrete must be mixed
at how many revolutions at the plant before leaving for the project? - ANS 70 to 100
When the water meters / scales are calibrated, prior to production, at what frequency should
they be checked there after? - ANS 3 moths
To what accuracy should the scales for weighing cement , pozzolan, slag and aggregates at the
plant be maintained - ANS 0.5% of maximum load normally handled
For concrete containing a water-reducing retarding admixture, in an agitator truck, the
maximum time for depositing the concrete shall not exceed: - ANS 90 minutes
If a load of concrete has been rejected due to excessive slump, the concrete may remain in the
transporting vehicle to reduce the slump. - ANS Is not allowed.
Who places the orders for concrete with the producer? - ANS The contractor
The minimum normal sampling frequency for the chloride content of structural concrete is: -
ANS 1 per design mix in use from the first day of production and every 30 calendar days or
less thereafter.
In what moister condition are the aggregates on the approved concrete mix designs? -
2
ANS SSD condition
Page
@COPYRIGHT BRAINBARTER 2025/2026
