Concrete Batch Plant Operator Exam Questions and Answers Latest Update 2025
Stockpiles of aggregate shall be maintained in a well-drained condition in order to: - Answers Minimize
Free Water Content
Coarse aggregate stockpiles must be sprinkled for at lest how many hours prior to batch for FDOT? -
Answers 24
Free moisture of the aggregate means: - Answers 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? - Answers Each week
For drill shaft concrete, the quantity of cement replaced with fly ash shall be: - Answers 33 thru 37%
In concrete, which material has a specific gravity of one? - Answers Water
What is the air content range for all classes of structural concrete except Class IV Shaft? - Answers 1.00
thru 6.00%
When can unmetered water be added to the concrete? - Answers Not at all.
Do not allow the total number of revolution at mixing speed to exceed: - Answers 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? - Answers 70 to 100
When the water meters / scales are calibrated, prior to production, at what frequency should they be
checked there after? - Answers 3 moths
To what accuracy should the scales for weighing cement , pozzolan, slag and aggregates at the plant be
maintained - Answers 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: - Answers 90 minutes
If a load of concrete has been rejected due to excessive slump, the concrete may remain in the
transporting vehicle to reduce the slump. - Answers Is not allowed.
Who places the orders for concrete with the producer? - Answers The contractor
The minimum normal sampling frequency for the chloride content of structural concrete is: - Answers 1
per design mix in use from the first day of production and every 30 calendar days or less thereafter.
Stockpiles of aggregate shall be maintained in a well-drained condition in order to: - Answers Minimize
Free Water Content
Coarse aggregate stockpiles must be sprinkled for at lest how many hours prior to batch for FDOT? -
Answers 24
Free moisture of the aggregate means: - Answers 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? - Answers Each week
For drill shaft concrete, the quantity of cement replaced with fly ash shall be: - Answers 33 thru 37%
In concrete, which material has a specific gravity of one? - Answers Water
What is the air content range for all classes of structural concrete except Class IV Shaft? - Answers 1.00
thru 6.00%
When can unmetered water be added to the concrete? - Answers Not at all.
Do not allow the total number of revolution at mixing speed to exceed: - Answers 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? - Answers 70 to 100
When the water meters / scales are calibrated, prior to production, at what frequency should they be
checked there after? - Answers 3 moths
To what accuracy should the scales for weighing cement , pozzolan, slag and aggregates at the plant be
maintained - Answers 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: - Answers 90 minutes
If a load of concrete has been rejected due to excessive slump, the concrete may remain in the
transporting vehicle to reduce the slump. - Answers Is not allowed.
Who places the orders for concrete with the producer? - Answers The contractor
The minimum normal sampling frequency for the chloride content of structural concrete is: - Answers 1
per design mix in use from the first day of production and every 30 calendar days or less thereafter.
