FHWA Bridge Inspection Techniques For NSTM (NHI‐22‐079 130078) Practice Test

Understanding fatigue susceptibility in this context means looking at how the source evaluates different bridge details and their tendency to develop and propagate fatigue cracks under repeated loading, not just past incidents. The ranking is built from how design features, connection types, and maintenance history influence crack initiation and growth. In that framework, the Silver Bridge is listed first as the least susceptible. This framing implies that, compared to the other items, its particular design details and the way fatigue would manifest under typical service loads are deemed less prone to progressive fatigue cracking according to the source’s criteria. The other options involve features that are more commonly associated with fatigue-prone behavior—such as specific connections or failure modes that have a clearer track record of fatigue issues—so they rank above the Silver Bridge in terms of susceptibility. So, within the source’s scoring, the Silver Bridge stands as the least susceptible, making it the correct choice.