Practice question

What does the tractor protection system do if trailer air lines rupture or a trailer breaks away?

  1. Protects tractor air pressure so the tractor can still make a safe stop
  2. Inflates the trailer tires
  3. Locks the steering wheel straight ahead
  4. Automatically adjusts all trailer slack adjusters

Answer: A — Protects tractor air pressure so the tractor can still make a safe stop

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