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