Practice question

A driver checks only the tractor and lead trailer lights, then departs with the rear trailer dark. What exam principle is violated?

  1. Every unit in the combination needs working required lights and electrical connections
  2. Only the tractor lights matter legally
  3. Rear trailer lights are optional in daylight
  4. The T endorsement removes lighting duties

Answer: A — Every unit in the combination needs working required lights and electrical connections

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