MRPLPR stands for Main Roof Perimeter Lighting Protection Ring.

• A. True
• B. False
• C. Not specified
• D. Not applicable

Answer: (A)

The main idea here is understanding how acronyms are defined in the standards. MRPLPR is indeed defined as Main Roof Perimeter Lighting Protection Ring. This term describes a ring-shaped conductor that runs around the edge of the main roof as part of the lightning protection system, providing a low-impedance path for surge currents to the grounding network and helping to maintain a consistent potential around the roof. That definition is what makes the statement true. The other options don’t fit because the term is explicitly defined in the standard, not left unspecified or inapplicable, and it is not a false description.