Magnetic Particle Inspection Level 2 Practice Exam

To eliminate nonrelevant indications during magnetic particle testing, one should:

1. Use more amperage

2. Demagnetize then remagnetize in the desired direction

3. Use lower amperage

4. Increase inspection time

The correct answer is: Demagnetize then remagnetize in the desired direction

To eliminate nonrelevant indications during magnetic particle testing, remagnetizing the part in the desired direction following demagnetization is a practical approach. This process ensures that any residual magnetism from previous tests that could produce irrelevant indications is removed, and then the part is magnetized specifically in a direction that enhances the visibility of relevant defects. When the part is demagnetized, unwanted magnetic fields that may cause false indications are eliminated. Subsequent remagnetization allows the inspector to control the magnetic field's orientation according to the specific area being examined or the type of defect expected. This targeted approach maximizes the detection of actual flaws while minimizing the chance of nonrelevant indications misrepresenting the part's integrity. Using more or less amperage does not directly address the issue of nonrelevant indications in the same targeted manner as the combination of demagnetizing and remagnetizing. Similarly, increasing inspection time alone may lead to longer inspections without addressing the core issue of managing magnetic fields effectively.