Concrete Batch Plant Operator Exam (FDOT) Test Questions and Answers
Rated A
Stockpiles of aggregate shall be maintained in a
Minimize Free Water Content
well-drained condition in order to:
Coarse aggregate stockpiles must be sprinkled for at lest
24
how many hours prior to batch for FDOT?
Moister on the surface of an aggregate that is above and
Free moisture of the aggregate means:
beyond the absorbed moister in the aggregate.
If the moister test is done other than by the cook-out
Each week
method, how often shall the other methods be verified?
For drill shaft concrete, the quantity of cement replaced
33 thru 37%
with fly ash shall be:
In concrete, which material has a specific gravity of one? Water
What is the air content range for all classes of structural
1.00 thru 6.00%
concrete except Class IV Shaft?
When can unmetered water be added to the concrete? Not at all.
Do not allow the total number of revolution at mixing
160 Revolutions
speed to exceed:
After all materials have been charged into the transit mixer
drum, the concrete must be mixed at how many revolu- 70 to 100
tions at the plant before leaving for the project?
When the water meters / scales are calibrated, prior to
production, at what frequency should they be checked 3 moths
there after?
To what accuracy should the scales for weighing cement ,
0.5% of maximum load normally handled
pozzolan, slag and aggregates at the plant be maintained
For concrete containing a water-reducing retarding ad-
mixture, in an agitator truck, the maximum time for de- 90 minutes
positing the concrete shall not exceed:
1/4
Rated A
Stockpiles of aggregate shall be maintained in a
Minimize Free Water Content
well-drained condition in order to:
Coarse aggregate stockpiles must be sprinkled for at lest
24
how many hours prior to batch for FDOT?
Moister on the surface of an aggregate that is above and
Free moisture of the aggregate means:
beyond the absorbed moister in the aggregate.
If the moister test is done other than by the cook-out
Each week
method, how often shall the other methods be verified?
For drill shaft concrete, the quantity of cement replaced
33 thru 37%
with fly ash shall be:
In concrete, which material has a specific gravity of one? Water
What is the air content range for all classes of structural
1.00 thru 6.00%
concrete except Class IV Shaft?
When can unmetered water be added to the concrete? Not at all.
Do not allow the total number of revolution at mixing
160 Revolutions
speed to exceed:
After all materials have been charged into the transit mixer
drum, the concrete must be mixed at how many revolu- 70 to 100
tions at the plant before leaving for the project?
When the water meters / scales are calibrated, prior to
production, at what frequency should they be checked 3 moths
there after?
To what accuracy should the scales for weighing cement ,
0.5% of maximum load normally handled
pozzolan, slag and aggregates at the plant be maintained
For concrete containing a water-reducing retarding ad-
mixture, in an agitator truck, the maximum time for de- 90 minutes
positing the concrete shall not exceed:
1/4
