Which device is used to locate the point where a fiber is broken?

Which device is used to locate the point where a fiber is broken?

• A. Visual fault locator
• B. Fusion splicer
• C. Test set
• D. Punchdown tool

Answer: (A)

A visual fault locator is used to pinpoint the location of a break in a fiber by sending visible light (usually red) into the fiber. When the fiber is intact, the light travels along with little or no leakage visible outside. If there’s a break, light escapes at that point, making the damaged section easy to see by eye or with a magnifier. This method is quick for locating breaks on short runs or within installed cables. The other tools have different purposes: a fusion splicer is for joining broken ends of fiber, a test set is for measuring performance or continuity but doesn’t show the exact break location visually, and a punchdown tool is used to terminate conductors in patch panels.

A visual fault locator is used to pinpoint the location of a break in a fiber by sending visible light (usually red) into the fiber. When the fiber is intact, the light travels along with little or no leakage visible outside. If there’s a break, light escapes at that point, making the damaged section easy to see by eye or with a magnifier. This method is quick for locating breaks on short runs or within installed cables.

The other tools have different purposes: a fusion splicer is for joining broken ends of fiber, a test set is for measuring performance or continuity but doesn’t show the exact break location visually, and a punchdown tool is used to terminate conductors in patch panels.