Florida DOT Concrete Batchman/Operator Practice Exam

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What adjustment is made due to a change in specific gravity?

Original weight plus new specific gravity
Absolute volume multiplied by unit weight with new specific gravity
Yield divided by new specific gravity
Unit weight adjusted by total weight

The correct answer is: Absolute volume multiplied by unit weight with new specific gravity

The adjustment made due to a change in specific gravity is correctly represented by multiplying the absolute volume by the unit weight with the new specific gravity. When specific gravity changes, it directly impacts the density of the materials used in concrete. The absolute volume refers to the volume of the aggregates or other components in the mix without considering voids. By multiplying this volume by the unit weight (which is influenced by the specific gravity), you can accurately calculate the adjusted weight of the materials to ensure the correct proportions in the concrete mix. This adjustment is crucial because concrete's strength, durability, and overall performance heavily depend on the precise ratios of its components. Therefore, maintaining accuracy in these calculations helps achieve the desired properties in the final product.