Which action best supports confirming that water added and materials meet the mix design during transport inspection?

• A. Check only the batch time.
• B. Verify that the delivery ticket matches the order and record the batching time.
• C. Verify water added and materials meet the mix design and contract requirements, and confirm ticket matches order.
• D. Inspect only the color and sound of the concrete.

Answer: (C)

The essential idea is to confirm that what is actually used in the batch matches the approved mix design and contract. The best action is to verify that the water added and the materials meet the mix design and contract requirements, and to confirm that the delivery ticket matches the order. This approach checks that the water-cement ratio and the proportions of cementitious materials and aggregates are within spec and that no substitutions or unapproved changes occurred, using the ticket as the traceability link back to the order. Merely checking batch time doesn’t ensure the materials or water meet the design, and inspecting only color or sound won’t verify mix proportions or compliance.