Non-Destructive Testing (NDT) Practice Test – Exam Prep & Study Guide

The correct answer identifies the minimum lifting forces and leg spacing ranges appropriate for performing dead weight lift checks for AC yokes, specifically recognizing a lifting force of 10 lbs and leg spacing of 2 to 4 inches.

In the context of non-destructive testing, AC yokes are used in magnetic particle testing to generate a magnetic field for detecting surface and near-surface discontinuities in ferromagnetic materials. The effectiveness of these tests is directly influenced by the AC yoke’s ability to generate sufficient lift, which is why there are established guidelines regarding minimum lifting forces.

The 10 lbs minimum requirement ensures that the magnetic field produced is adequately strong for reliable detection of flaws. Additionally, the specified spacing of 2 to 4 inches is critical for ensuring that the magnetic field is properly distributed across the area of interest, allowing for effective testing without risking inconsistencies or weaknesses in the detection process.

These parameters are grounded in industry standards that balance effective testing capabilities with operational practicality, making this combination a recognized practice in the NDT field.