ABYC Marine Electrical Practice Exam

Which of the following can contribute to increased electrical resistance?

1. Short conductor runs

2. Large wire gauge

3. Correct wire type

4. Loose or corroded connections

The correct answer is: Loose or corroded connections

Loose or corroded connections can significantly increase electrical resistance in a circuit. When electrical connections are not secure, the contact area is reduced, leading to higher resistance at that point. Corrosion, which occurs due to exposure to moisture or other environmental factors, can form an insulating layer over the conductive materials, further increasing resistance. In electrical circuits, increased resistance can lead to a variety of issues, including voltage drops, overheating, and potential circuit failure. Maintaining tight and clean connections is crucial for ensuring efficient operation of electrical systems, especially in marine environments where conditions can accelerate corrosion. The other choices, such as short conductor runs, large wire gauge, and correct wire type, all contribute to lower resistance by enhancing the conductivity and efficiency of the electrical system.