Multiple choice

An installed fiber run can be checked for faults, integrity, and the performance of the media by using what device?

  1. light injector

  2. OTDR

  3. TDR

  4. multimeter
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

An Optical Time Domain Reflectometer (OTDR) is the specialized device used to test fiber optic installations. It sends light pulses into the fiber and analyzes the backscattered light to detect faults, measure fiber length, identify bends or breaks, and assess overall signal integrity and performance characteristics. TDR is for copper cables, multimeters measure electrical signals, and light injector is not a standard testing tool.

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