Florida DOT Concrete Batchman/Operator Practice Exam

When is the number of mixing revolutions at mixing speed recorded on the delivery ticket?

1. After the mixed concrete is delivered

2. When all mixing is completed at the plant

3. At the beginning of the mixing process

4. Before filling out the delivery ticket

The correct answer is: When all mixing is completed at the plant

The number of mixing revolutions at mixing speed is recorded on the delivery ticket when all mixing is completed at the plant. This is an important part of the quality control process in concrete batching, as it helps ensure that the concrete has been mixed thoroughly and is consistent with specifications before it is transported to the job site. Recording this information after mixing is complete allows operators to verify that the concrete has met the required mixing time and parameters set by standards or project specifications. This ensures that the concrete will perform as expected once delivered, maintaining its integrity and strength. In contrast, noting the number of revolutions at different stages, such as during the delivery or before the ticket completion, would not provide an accurate representation of the mixing process. Thus, understanding when to record this critical data helps maintain the quality assurance that is vital in construction.