What is the purpose of the inspect-clean-inspect sequence?

• A. Measures connector temperature.
• B. Calibrates laser power.
• C. Tests electrical continuity.
• D. Prevents pushing debris into ferrules and verifies cleanliness post-clean.

Answer: (D)

Keeping fiber-optic connections clean is crucial because even tiny particles on the end-face can cause signal loss or reflections when two connectors mate. The inspect-clean-inspect sequence is exactly about that: first check the connector for any debris or contamination, then clean it with proper fiber-cleaning tools, and finally re-check to confirm the surface is clean. This approach prevents pushing debris into the ferrule during mating and ensures cleanliness after cleaning, which protects the optical path and maintains performance. It isn’t about measuring temperature, calibrating laser power, or testing electrical continuity, which are unrelated to maintaining end-face cleanliness.