Which of the following actions could lead to legal liability?

Operating an ambulance with a known mechanical defect poses significant legal liability because it directly jeopardizes the safety of patients, crew, and the public. When an operator is aware of a mechanical defect and fails to address it, they may be considered negligent if an incident occurs as a result. This negligence could lead to legal repercussions, as it demonstrates a clear disregard for duty of care owed to both patients who rely on safe transportation and to other road users.

In contrast, providing operator training for ambulance drivers, conducting vehicle inspections, and ensuring personnel are in uniform are proactive measures aimed at enhancing safety and compliance. These actions are generally seen as responsible practices that help minimize the risk of incidents rather than contributing to them. Therefore, they are not typically associated with legal liability in the same way that knowingly operating a defective vehicle is.