Practice question

What are steering wedges used for on a semi-trailer combination?

  1. Forced steering of the semi-trailer; they are attached to the semi-trailer and work with the fifth-wheel coupling
  2. Forced steering of the tractor's front axle only
  3. Locking the trailer parking brake on a 16 % grade
  4. Marking the combination with three orange cab lights

Answer: A — Forced steering of the semi-trailer; they are attached to the semi-trailer and work with the fifth-wheel coupling

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