FAA Powerplant Written Practice Test

Which type of terminals should be used for hand crimped wire connections?

1. Only brass terminals

2. Only copper terminals

3. Only aluminum terminals

4. Both copper and aluminum terminals

The correct answer is: Only aluminum terminals

The correct choice focuses on the material properties of aluminum terminals and their suitability for hand-crimped wire connections. Aluminum terminals are often preferred in aircraft electrical systems due to their lightweight nature, good corrosion resistance, and satisfactory conductivity for many applications. Using aluminum specifically can also be beneficial in terms of cost and overall weight savings, which is critical in aviation. Furthermore, proper handling and crimping techniques are essential when working with aluminum to ensure reliable connections. Aluminum, when properly crimped, creates a secure joint that can withstand the conditions present in aircraft environments. It’s worth noting that while copper is an excellent conductor and is used in various applications, it may not always be the best choice for hand crimped connections in every scenario, especially when concerns about weight and corrosion resistance are paramount. As for brass, it is generally not recommended for crimping connections due to its properties, which may lead to reliability issues over time in harsh conditions. Therefore, aluminum terminals stand out as the most appropriate choice for hand-crimped wire connections.