Practice question

What advanced troubleshooting technique is used to locate a fault in an underground roadway lighting cable?

  1. Replace all the cable without locating the fault
  2. Time Domain Reflectometry (TDR) to send a pulse through the cable and measure the reflected signal to pinpoint the fault location
  3. Visual inspection of the entire underground cable
  4. Shake the cable to find the break

Answer: B — Time Domain Reflectometry (TDR) to send a pulse through the cable and measure the reflected signal to pinpoint the fault location

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