Copper and copper-based alloys are used in avionic systems for what purpose?

• A. Contacts, springs, connectors, printed circuit boards runs, and wires
• B. Structural supports
• C. Lubrication systems
• D. Cooling fins

Answer: (A)

Copper and copper-based alloys are chosen in avionic electrical systems because they provide excellent electrical conductivity combined with good mechanical properties. This makes them ideal for parts that carry electrical signals and must endure frequent mating and vibration: contacts need low resistance and dependable wear resistance; springs require fatigue resistance and the ability to return to shape; connectors must maintain reliable contact through many cycles; printed circuit boards rely on copper traces for clean, low-resistance signal paths; wires need high conductivity for efficient power and signal transmission. Copper alloys such as phosphor bronze or beryllium copper offer a balance of strength and conductivity, which is why they’re common in springs and contact surfaces. Other options are typically chosen for weight, strength, or thermal considerations rather than electrical performance, so they’re less suited to these electrical roles.