According to OSHA guidelines, who is permitted to operate a digger derrick?

The correct choice is that only trained persons are permitted to operate a digger derrick according to OSHA guidelines. This requirement underscores the importance of having operators who possess specific skills and knowledge to handle the equipment safely. Training ensures that operators are familiar with the operational controls, safety protocols, and potential hazards associated with digger derricks.

The focus on trained personnel reflects OSHA's commitment to workplace safety, as improper operation of heavy machinery can lead to accidents and injuries. Although certification can enhance a person's qualifications and awareness of safety practices, the primary criterion is that individuals must be adequately trained for the specific equipment they will be using. This training may encompass understanding the manufacturer's guidelines, hands-on operation procedures, and safety measures necessary for safe performance.

While other choices imply varying degrees of qualifications, they may not align with the precise guidelines that prioritize the necessity of formal training as a baseline for safe operation.