Final answer:
Option 1 is true; a guardrail, chain, or gate is required across a hoisting/landing area when hoisting is not in progress. Option 2 is false; high-voltage wires are not wrapped in an insulating material.
Step-by-step explanation:
When a guardrail system is used at a hoisting/landing area for materials, it is standard safety practice to have a chain, gate, or removable guardrail in place across the opening when hoisting operations are not occurring. This measure is to ensure that there is a protective barrier preventing falls or accidental entry into the hoisting area during times when materials are not actively being moved. So the answer is Option 1: True.
Regarding the second part, high-voltage wires seen on tall metal-frame towers are indeed held aloft by insulators; however, these high-voltage wires are generally not wrapped in insulating material due to their elevated position and the practical challenges of doing so. Thus, the statement is Option 2: False.