Concrete Batch Plant Operator Exam
FDOT
When the water meters / scales are calibrated, prior to production, at what frequency
should they be checked there after? - Correct Answer-3 moths
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 to the 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 many revolutions at the plant before leaving for the project? - Correct
Answer-70 to 100
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 aggregate.
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
To what accuracy should the scales for weighing cement , pozzolan, slag and
aggregates at the plant be maintained - Correct 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: - Correct Answer-90
minutes
FDOT
When the water meters / scales are calibrated, prior to production, at what frequency
should they be checked there after? - Correct Answer-3 moths
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 to the 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 many revolutions at the plant before leaving for the project? - Correct
Answer-70 to 100
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 aggregate.
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
To what accuracy should the scales for weighing cement , pozzolan, slag and
aggregates at the plant be maintained - Correct 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: - Correct Answer-90
minutes
