Who is correct about safety when working under a vehicle supported only by a jack?

In the context of working under a vehicle supported only by a jack, it's crucial to understand that reliance on a jack alone can be extremely dangerous. A jack, if not secured properly, can fail, leading to catastrophic consequences for anyone working underneath.

Technician B is correct in stressing the importance of safety and the necessity of using jack stands when working under a vehicle. Jack stands provide a stable and secure support system that significantly reduces the risk of the vehicle collapsing. Their design allows them to hold the weight of the vehicle firmly, and they are created to withstand the stress of being used as a support point.

On the other hand, any notion that a jack alone is acceptable for working under vehicles without additional supporting equipment does not prioritize safety, as recognized by Technician B’s stance. Thus, understanding the mechanics of support systems and the importance of redundancy in equipment is vital for preventing accidents while working on or under vehicles.