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