CONCRETE BATCH PLANT OPERATOR EXAM (FDOT)
QUESTIONS AND ANSWERS LATEST COMPLETE GUIDE.
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
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
When the water meters / scales are calibrated, prior to production, at what
frequency should they be checked there after? ~CORRECT ANSWER~3
moths
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
QUESTIONS AND ANSWERS LATEST COMPLETE GUIDE.
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
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
When the water meters / scales are calibrated, prior to production, at what
frequency should they be checked there after? ~CORRECT ANSWER~3
moths
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
