Certified Fiber Optics Practice Exam

Which of the following components is primarily tested using a visual fault locator?

1. Connectors

2. Cables

3. Splices

4. All of the above

The correct answer is: All of the above

A visual fault locator is a tool primarily used to identify breaks, faults, and poor connections within fiber optic components. The reason why all components—connectors, cables, and splices—are included in the scope of testing is that a visual fault locator emits a bright light (usually laser) that can travel through the fiber. When using this tool, the light will show at the point of a fault or break within the fiber optic system. For connectors, the light can help detect misalignment or damage at the connection points. For cables, any sharp bends, breaks, or severe stress points can be identified, as the light will not pass through if the fiber is compromised. For splices, the locator can reveal poor splicing techniques or damaged fibers where the light may not fully transmit. Since the visual fault locator is effective in detecting issues across various fiber optic components, it is suitable for testing all three categories mentioned. Therefore, the choice indicating "all of the above" correctly reflects the comprehensive testing capability of the visual fault locator in evaluating the integrity of fiber optic systems.