Final answer:
The statement about scaffold requirements is false; safety features like guardrails, midrails, and toe boards vary by scaffold type and use case. High-voltage transmission lines are indeed held by insulating connectors but are not wrapped in insulating material; the air acts as the insulator.
Step-by-step explanation:
The statement that guardrails, midrails, and toe boards are required on all scaffolds is false. While these safety features are common and important for fall protection, the requirements for when they must be installed can vary depending on the type of scaffold and the work being performed. For instance, certain types of scaffolding may require alternative fall protection measures or may not require midrails or toe boards in specific circumstances.
In response to the reference question, the high-voltage wires connected to metal-frame towers being held aloft by insulating connectors is true, however, these wires are not wrapped in an insulating material. Instead, they are typically made of bare conductors without additional insulation, as the surrounding air acts as an insulator, and the height of the wires keeps them out of reach, preventing accidental contact.