If an indication appears using both the residual and continuous methods, what type of indication is it likely to be?

When an indication is detected using both the residual and continuous magnetic particle testing methods, it indicates that the indication is likely a relevant indication. This is because both methods are designed to identify actual flaws or discontinuities in ferromagnetic materials. The residual magnetism is used to reveal indications after the magnetizing field is removed, while the continuous method provides immediate feedback during the application of the magnetic field.

The concurrence of indications from both methods suggests that the detected feature is not an artifact or a false indication. Such responses reinforce the probability that the indication correlates with an actual defect or relevant structural concern, rather than a negligible or suspicious anomaly. A relevant indication is of significant interest in quality control and is typically flagged for further evaluation, thereby necessitating further investigation to ensure structural integrity.