What is a requirement for a properly prepared face bend specimen?

A properly prepared face bend specimen follows specific requirements to ensure valid testing results. The correct answer emphasizes that the specimen must be 9 inches long and 1 inch wide. This dimensional specification is critical because it aligns with industry standards that are established to evaluate the quality of welds adequately and ensure the specimen's geometry provides reliable data during the bend test.

The length and width are defined to maintain consistency across testing conditions, which is vital for comparability of results. When specimens adhere to these dimensions, it helps in accurately determining the ductility and overall performance of the weld in service conditions.

While the other options may contain misleading or incorrect information, the focus on precise measurements in option B supports the integrity of the testing process. Such standards are in place to ensure that all welds are tested under uniform conditions, providing a clear indication of their performance characteristics.