Practice question

What is a 'jackknife' in an articulated vehicle, and what most commonly triggers it?

  1. The trailer swinging round towards the cab after the drive wheels lock under harsh braking, especially when unladen or on a slippery surface
  2. The trailer doors bursting open during cornering
  3. A broken fifth wheel caused by overloading the kingpin
  4. The tractor rolling backwards on a steep hill start

Answer: A — The trailer swinging round towards the cab after the drive wheels lock under harsh braking, especially when unladen or on a slippery surface

The correct answer is shown above. Try the full quiz for additional practice.

Practice more: DRTS Heavy-Vehicle Theory Practice Questions - Botswana DRTS Heavy-Vehicle Driving Theory Test (Classes C, C1, EB, EC, EC1) Exam →