Once the defects are identified visually, _______ procedures must be used to verify the extent of the defect

• A. Physical
• B. Acoustic
• C. Thermal
• D. Mechanical

Answer: (A)

When a defect is found visually, you need to quantify how large or deep it is to assess its impact. That’s done with physical procedures, which involve direct measurements and dimensional checks. Using tools like rulers, calipers, depth gauges, or templates you obtain precise information about the defect’s length, depth, and area. This quantitative data is essential for deciding repair needs and safety implications, beyond the mere presence of a flaw.

Acoustic methods rely on sound waves to reveal features but don’t always give exact size. Thermal imaging shows heat patterns that can hint at subsurface issues, but isn’t the primary way to establish defect extent. Mechanical tests, such as loading, can indicate structural performance but may be invasive or destructive and aren’t the standard method for sizing a defect.