Overhead Crane Practice Test

How many broken wires in one strand indicate the removal criteria for regular lay wire rope?

1. Two broken wires

2. Four broken wires

3. Six broken wires

4. Twelve broken wires

The correct answer is: Four broken wires

The removal criteria for regular lay wire rope stipulate that if four broken wires are found in one strand, the wire rope must be removed from service. This guideline is based on safety standards that aim to ensure the integrity and reliability of the wire rope while in use. When inspecting a wire rope, the presence of broken wires can indicate significant wear, damage, or fatigue, which can compromise the rope's strength. The criterion of four broken wires serves as a threshold that recognizes the balance between operational safety and practical wear, signaling that further use could present a risk of failure. By adhering to this standard, operators can help prevent accidents that could result from equipment failure. This removal criterion is established by industry regulations and best practices to maintain safety in environments where wire rope is used, particularly in overhead lifting applications. Understanding this number supports proper maintenance practices and fosters a culture of safety among operators.