Practice question

What is the proper procedure if your trailer begins to skid sideways (trailer jackknife) under braking?

  1. Apply the trailer hand brake (trolley valve) as hard as possible
  2. Release the service brakes immediately to allow trailer wheels to regain traction and roll, and steer in the direction of the skid
  3. Accelerate to top speed while pulling the emergency parking brake
  4. Jump out of the driver's side door

Answer: B — Release the service brakes immediately to allow trailer wheels to regain traction and roll, and steer in the direction of the skid

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