Under what circumstances should the boom of the line truck not be used?

The reasoning for selecting this answer revolves around the operational safety and functionality of the line truck's boom. The boom is designed for specific tasks within the limits of its engineering capabilities. Pulling poles out of the ground is a task that requires significant force and torque, which the boom is not engineered to handle. This could lead to equipment damage or failure of the boom, posing serious safety risks to the operator and nearby personnel.

In contrast, setting new poles, lifting heavy objects, and using the boom in windy conditions can be accomplished within certain safety protocols and operational guidelines. For instance, the boom is commonly used for lifting and adjusting poles as long as these actions are performed while adhering to safety standards. Similarly, it can be utilized for heavy objects but requires proper load assessments and safety precautions. Windy conditions pose risks that can be mitigated with proper techniques and precautions, but this doesn't inherently render the boom unusable. Thus, the emphasis on avoiding pole pulling highlights a critical understanding of equipment limitations and safety practices in utility operations.