Which statement is true about the characteristics of the split portion after sampling?

• A. In the incremental method, the entire sample should be turned over itself at least three times.
• B. When using the type A mechanical splitter, reintroduce one of the four containers back into the splitter.
• C. The split portion of the field sample should have the same characteristics as the field sample.
• D. The type B mechanical splitter used for coarse aggregate should have at least eight chutes, which are set to be at least 50% wider than the largest aggregate particle being split.

Answer: (C)

When you split a field sample for testing, the goal is to keep a portion that truly represents what was collected. The split portion used for analysis should have the same characteristics as the field sample—the same particle size distribution, moisture, temperature, and other relevant properties—so that test results accurately reflect the material in the field. If the split portion differed, you’d be basing conclusions on a biased subset rather than the real material.

That’s why this statement is the best: it directly expresses the essential idea of representativeness in sampling. The other points describe procedural specifics that aren’t universal rules: the exact number of times you mix or turn the sample isn’t a fixed requirement, reintroducing a container into the splitter would bias the sample, and the precise chute count and sizing for a splitter depend on the equipment and standards in use. Following the standard procedure for the splitter you’re using is important, but the core principle remains that the split portion should mirror the field sample.