Practice question

For a Maryland Class A combination trailer skids?

  1. Keep the wheels locked until the vehicle stops
  2. Correct a jackknife by pulling the fifth-wheel release
  3. A trailer jackknife usually starts when trailer wheels lock and slide sideways.
  4. Apply more trailer-only braking to a trailer skid

Answer: C — A trailer jackknife usually starts when trailer wheels lock and slide sideways.

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