Non-Destructive Testing (NDT) Practice Test

If uncertain about your findings while conducting a magnetic particle test and you are the only qualified inspector, what should you do?

1. Proceed with the inspection

2. Record your findings

3. Demag the part and repeat the procedure

4. Consult with a supervisor

The correct answer is: Demag the part and repeat the procedure

When faced with uncertainty about findings during a magnetic particle test, the best course of action is to demagnetize the part and repeat the procedure. This is crucial because the initial results may have been affected by residual magnetism, surface contamination, or improper application of the magnetic field or magnetic particles. By demagnetizing the part, any residual magnetic fields that could interfere with the test are eliminated, thereby ensuring that the subsequent examination yields results that are accurate and reliable. Repeating the procedure after demagnetization allows for a clearer assessment of the material's integrity. It also demonstrates diligence in ensuring the validity of the inspection results, which is of paramount importance in maintaining safety and the effectiveness of non-destructive testing protocols. Taking this step shows a commitment to quality and thoroughness in the inspection process, especially when the inspector is the sole qualified individual overseeing the evaluation.