Which method is least likely to completely eliminate a hazard?

The method that is least likely to completely eliminate a hazard is the use of personal protective equipment (PPE). While PPE is essential for ensuring the safety of individuals exposed to hazards, it serves as a safeguard rather than a means of removing the hazard itself. PPE, such as helmets, gloves, goggles, and masks, provides a layer of protection against risks but does not address the source of the hazard. If the hazard exists, individuals must rely on the equipment for protection, which may not always be foolproof in preventing injury or exposure.

In contrast, the other methods—substitution, engineering controls, and elimination—focus on directly addressing or reducing the hazard. Substitution involves replacing a hazardous substance or process with a less dangerous one. Engineering controls encompass changes to the workplace or equipment that minimize exposure to hazards, such as ventilation systems or machine guards. Elimination involves completely removing the hazard from the environment. These methods are generally more effective in creating a safer workplace as they aim to reduce or eliminate the risk at its source rather than merely protecting individuals from its effects.