Which passenger safety system includes pretensioners that present a significant ignition hazard during rescue operations?

• A. Airbags
• B. Seat belts
• C. Child restraints
• D. Head protection systems

Answer: (B)

The concept being tested is that some passenger safety components use energetic devices that can ignite during rescue. A seat belt with a pretensioner deploys a small energetic charge to quickly tighten the belt in a crash. That charge can act as an ignition source, creating a significant ignition hazard for rescuers if exposed to heat or flames during a rescue operation. While other systems like airbags also involve energetic components, the term pretensioner is specific to the seat belt system, which is why this option is the best choice. Child restraints and head protection systems don’t involve the same ignition-prone pretensioning mechanism.