How can you distinguish a composite panel from a metal panel during inspection or disassembly?

• A. Composites are non-metallic, often non-magnetic and show different wear patterns; metals are conductive and may show corrosion and magnetism.
• B. Composites are magnetic and conductive; metals are non-conductive.
• C. Composites are lightweight plastics; metals are heavy and rust.
• D. Composites are non-conductive and non-magnetic; metals are conductive.

Answer: (D)