geekban
Concrete Batch Plant Operator Exam (FDOT) QUESTIONS & ANSWERS
(VERIFIED)____Florida Department of Transportation (FDOT)
Concrete Batch Plant Operator Exam Study Guide
Stockpiles of aggregate shall be maintained in a well-drained condition in
order to: (✅✅✅) - Minimize Free Water Content
Coarse aggregate stockpiles must be sprinkled for at lest how many hours
prior to batch for FDOT? (✅✅✅) - 24
Free moisture of the aggregate means: (✅✅✅) - 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? (✅✅✅) - Each week
For drill shaft concrete, the quantity of cement replaced with fly ash shall be:
(✅✅✅) - 33 thru 37%
In concrete, which material has a specific gravity of one? (✅✅✅) - Water
, What is the air content range for all classes of structural concrete except
Class IV Shaft? (✅✅✅) - 1.00 thru 6.00%
When can unmetered water be added to the concrete? (✅✅✅) - Not at
all.
Do not allow the total number of revolution at mixing speed to exceed:
(✅✅✅) - 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? (✅✅✅) - 70 to 100
When the water meters / scales are calibrated, prior to production, at what
frequency should they be checked there after? (✅✅✅) - 3 moths
To what accuracy should the scales for weighing cement , pozzolan, slag and
aggregates at the plant be maintained (✅✅✅) - 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:
(✅✅✅) - 90 minutes
Concrete Batch Plant Operator Exam (FDOT) QUESTIONS & ANSWERS
(VERIFIED)____Florida Department of Transportation (FDOT)
Concrete Batch Plant Operator Exam Study Guide
Stockpiles of aggregate shall be maintained in a well-drained condition in
order to: (✅✅✅) - Minimize Free Water Content
Coarse aggregate stockpiles must be sprinkled for at lest how many hours
prior to batch for FDOT? (✅✅✅) - 24
Free moisture of the aggregate means: (✅✅✅) - 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? (✅✅✅) - Each week
For drill shaft concrete, the quantity of cement replaced with fly ash shall be:
(✅✅✅) - 33 thru 37%
In concrete, which material has a specific gravity of one? (✅✅✅) - Water
, What is the air content range for all classes of structural concrete except
Class IV Shaft? (✅✅✅) - 1.00 thru 6.00%
When can unmetered water be added to the concrete? (✅✅✅) - Not at
all.
Do not allow the total number of revolution at mixing speed to exceed:
(✅✅✅) - 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? (✅✅✅) - 70 to 100
When the water meters / scales are calibrated, prior to production, at what
frequency should they be checked there after? (✅✅✅) - 3 moths
To what accuracy should the scales for weighing cement , pozzolan, slag and
aggregates at the plant be maintained (✅✅✅) - 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:
(✅✅✅) - 90 minutes
