Which method should be avoided to ensure safe operation when using air compressors?

Guarding by location refers to placing machinery or hazardous equipment, such as air compressors, in a way that minimizes exposure to workers. While this method can be useful in certain contexts, it should not be solely relied upon for ensuring safety. This is because relying purely on location may lead to situations where employees inadvertently enter hazardous areas or where protective measures are insufficient against the risks associated with the equipment.

In contrast, the other methods ensure a comprehensive approach to safety. Using proper signage alerts personnel to potential hazards, providing training equips workers with the knowledge necessary to operate equipment safely, and employing safety barriers offers a physical means of protection from hazards. Each of these strategies contributes to a more robust safety culture than reliance on location alone, emphasizing the need for multiple layers of protection in machine guarding practices.