Practice question

What is the primary function of the tractor fifth wheel coupling device?

  1. To connect the tractor's steering system to the trailer's axles
  2. To secure the trailer to the tractor while allowing articulation
  3. To adjust the height of the semi-trailer's landing gear
  4. To supply electrical power to the trailer tail lights

Answer: B — To secure the trailer to the tractor while allowing articulation

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