Splitting the sample twice is sufficient to obtain a testing sample size.

• A. Not specified
• B. True
• C. False
• D. Only for fine

Answer: (B)

Getting a testing sample that is both representative of the whole and sized to the test requirements is achieved through careful mixing and splitting. After you thoroughly mix the collected sample to homogenize it, you split it into two equal parts to reduce any bias from layering or particle distribution. Then you split one of those parts again to reach the quantity needed for testing. This two-step splitting, often done by quartering, yields a portion that still represents the original material while providing the correct mass for the tests. If more material is needed for multiple tests, you can split again or use additional portions, but two splits are typically enough to obtain a valid testing sample size.