When Method B is used, the cross - sectional area should be determined for a horizontal plane through the specimen as near as possible to the top of the specimen.

• A. True
• B. Not specified
• C. Unknown
• D. False

Answer: (D)

The important idea is to measure the cross-sectional area at a depth that truly represents the specimen’s geometry, not influenced by surface finish or edge effects. Taking the plane near the top can introduce errors from trimming, surface irregularities, or nonuniform compaction at the ends. Instead, the cross-sectional area should be determined at, or as close as practical to, the mid-height of the specimen, with the plane parallel to the base and perpendicular to the axis. This mid-height plane provides a more accurate and representative area for calculations, reducing distortion from surface conditions or end effects.