Final answer:
Fall protection harnesses indeed have a dorsal D-ring for attachment to fall arrest or travel restraint systems, which makes the statement true. High-voltage wires, contrary to the statement, are not insulated but are held by insulators to prevent direct contact and ensure safety.
Step-by-step explanation:
The statement regarding fall protection harnesses having a dorsal D-ring is true. Fall protection harnesses are equipped with a dorsal D-ring because it is used as the attachment point for fall arrest or travel restraint systems. This important safety feature ensures that in the event of a fall, the force is distributed across the body, minimizing the risk of injury. Hence, the correct answer to the true or false question is 'A. True'.
Coming to the statement about high-voltage wires, it is false that these wires are wrapped in an insulating material. In reality, these wires are typically not insulated but are suspended high enough to prevent direct contact, and are held aloft by insulators made of materials like glass, porcelain, or composite polymers which are designed to support the electrical load without conducting current. Thus, the correct answer to this true or false question is 'B. False'.