Concrete Batch Plant Operator Exam
2026 Questions and Answers
Stockpiles of aggregate shall be maintained in a well-drained condition in order to:
- Answer -Minimize Free Water Content
Coarse aggregate stockpiles must be sprinkled for at lest how many hours prior to
batch for FDOT? - Answer -24
Free moisture of the aggregate means: - Answer -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? - Answer -Each week
For drill shaft concrete, the quantity of cement replaced with fly ash shall be: -
Answer -33 thru 37%
In concrete, which material has a specific gravity of one? - Answer -Water
What is the air content range for all classes of structural concrete except Class IV
Shaft? - Answer -1.00 thru 6.00%
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, When can unmetered water be added to the concrete? - Answer -Not at all.
Do not allow the total number of revolution at mixing speed to exceed: - Answer -
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?
- Answer -70 to 100
When the water meters / scales are calibrated, prior to production, at what
frequency should they be checked there after? - Answer -3 moths
To what accuracy should the scales for weighing cement , pozzolan, slag and
aggregates at the plant be maintained - Answer -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: - Answer -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. - Answer -Is not allowed.
Who places the orders for concrete with the producer? - Answer -The contractor
©COPYRIGHT 2025, ALL RIGHTS RESERVED 2
2026 Questions and Answers
Stockpiles of aggregate shall be maintained in a well-drained condition in order to:
- Answer -Minimize Free Water Content
Coarse aggregate stockpiles must be sprinkled for at lest how many hours prior to
batch for FDOT? - Answer -24
Free moisture of the aggregate means: - Answer -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? - Answer -Each week
For drill shaft concrete, the quantity of cement replaced with fly ash shall be: -
Answer -33 thru 37%
In concrete, which material has a specific gravity of one? - Answer -Water
What is the air content range for all classes of structural concrete except Class IV
Shaft? - Answer -1.00 thru 6.00%
©COPYRIGHT 2025, ALL RIGHTS RESERVED 1
, When can unmetered water be added to the concrete? - Answer -Not at all.
Do not allow the total number of revolution at mixing speed to exceed: - Answer -
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?
- Answer -70 to 100
When the water meters / scales are calibrated, prior to production, at what
frequency should they be checked there after? - Answer -3 moths
To what accuracy should the scales for weighing cement , pozzolan, slag and
aggregates at the plant be maintained - Answer -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: - Answer -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. - Answer -Is not allowed.
Who places the orders for concrete with the producer? - Answer -The contractor
©COPYRIGHT 2025, ALL RIGHTS RESERVED 2
