When is jack-knifing most likely to occur?

  1. When the trailer springs are over-greased.
  2. When travelling sideways across a slope.
  3. When travelling uphill.
  4. When trying to reduce speed sharply while travelling downhill.

Correct Answer

When trying to reduce speed sharply while travelling downhill.

Explanation: Towing a trailer or caravan dramatically reduces the stability of the towing vehicle. If a driver brakes sharply or slows down quickly; the trailer may pivot around the tow hitch coupling; causing both vehicles to go off course; and possibly overturn.

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