FAA Powerplant Written Practice Test

What should be avoided in aircraft wiring practices to ensure safety?

1. Using insulated wires

2. Excessive splicing of wires

3. Proper grounding techniques

4. Using corrosion-resistant materials

The correct answer is: Excessive splicing of wires

Excessive splicing of wires in aircraft wiring practices should be avoided because it can lead to increased resistance at the splice points, which may generate heat and create potential failure points in the electrical system. This can compromise the reliability of the wiring and introduce the risk of electrical malfunctions or shorts that may jeopardize flight safety. Each splice also represents a point where corrosion can occur, particularly if the splice is not adequately protected, leading to further risks of failure. Therefore, maintaining the integrity of the wiring with minimal splicing, along with using proper installation techniques, is crucial for ensuring the overall safety and performance of the aircraft's electrical system.