Magnetic Particle Inspection Level 2 Practice Exam

What general term describes a break in the metallic continuity of a part being tested?

1. Discontinuity

2. Crack

3. Seam

4. Lap

The correct answer is: Discontinuity

The term that describes a break in the metallic continuity of a part being tested is "discontinuity." Discontinuities can refer to a wide range of abnormalities or irregularities in the material, which may include cracks, seams, laps, and other defects. The usage of "discontinuity" is broad and encompasses various types of flaws or breaks that can affect the integrity of the material or part being inspected. In contrast, while "crack" specifically identifies a type of discontinuity, it does not cover all potential irregularities. A "seam" refers to a joint where two pieces of material come together, and it is not necessarily a defect unless it indicates improper joining. Similarly, "lap" generally describes a situation where material overlaps or folds improperly, which can be problematic but is also a specific type of defect. Thus, "discontinuity" is the most general term, making it the correct choice in this context.