Visual Testing (VT) Practice Exam

What might cause a service-induced failure for a component support?

1. Cracking or chipped concrete

2. Loose nuts or improper thread engagement

3. Bent or deformed bolts

4. All of the above

The correct answer is: All of the above

Service-induced failures refer to issues that arise in components due to stresses and strains encountered during their operational lifetimes. Each of the factors listed can lead to different forms of failure in component supports. Cracking or chipped concrete can undermine the structural integrity of a support, leading to an inability to bear loads effectively. When concrete is compromised, it can cause significant instability to any structure it supports. Loose nuts or improper thread engagement can result in insufficient clamping force or connection. This situation can lead to vibrations or movement of components that were intended to be secured tightly, ultimately resulting in failure of the assembly. Bent or deformed bolts are also a critical issue. When bolts are bent or deformed, their load-bearing capacity is compromised. They may not function effectively in their intended role, leading to eventual failure under stress. Each of these conditions represents a legitimate cause of service-induced failure. Therefore, the choice reflecting that all of the conditions—cracked concrete, loose nuts, and bent bolts—can lead to such failures is the most accurate answer.