Concrete Batch Plant Operator Exam (FDOT) Questions and Answers 2024

Concrete Batch Plant Operator Exam (FDOT) Questions and Answers 2024 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 If a load of concrete has been rejected due to excessive slump, the concrete may remain in the transporting vehicle to reduce the slump. -Answer-Is not allowed. Who places the orders for concrete with the producer? -Answer-The contractor The minimum normal sampling frequency for the chloride content of structural concrete is: -Answer-1 per design mix in use from the first day of production and every 30 calendar days or less thereafter