A service-induced failure for a component support could be caused by

• A. Cracking Or Chipped Concrete.
• B. Loose Nuts Or Improper Thread Engagement.
• C. Bent Or Deformed Bolts.
• D. All Of The Above.

Answer: (D)

Service-induced failures happen when the support system is compromised under operating conditions. Cracking or chipped concrete weakens the base by reducing bearing area and creating stress concentrations that can grow under load, leading to settlement or failure of the support. Loose nuts or improper thread engagement reduce clamping force, allowing movement and vibration that promote wear, further loosening, and eventual joint failure. Bent or deformed bolts weaken the fastener system, alter the load path, and raise stress and fatigue risk. Any one of these issues can degrade a component’s support during service, so all of the above are plausible causes of a service-induced failure.