Practice question

How should the trailer parking brake be tested during pre-trip on a TDA?

  1. Apply only the tractor parking brake and pull
  2. Apply only the trailer parking brake and gently attempt to pull forward to verify it holds the trailer
  3. Skip the test if the apparatus rolls
  4. Apply both brakes and pull

Answer: B — Apply only the trailer parking brake and gently attempt to pull forward to verify it holds the trailer

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