Practice question

What is the primary danger when backing a semi-trailer and the angle between tractor and trailer becomes excessively sharp?

  1. The headlights will turn off
  2. Jackknifing: the trailer strikes and crushes the tractor cab side, breaking airlines, damaging steering linkage, or blowing tyres
  3. The trailer will automatically decouple from the fifth wheel
  4. The engine cooling radiator will freeze

Answer: B — Jackknifing: the trailer strikes and crushes the tractor cab side, breaking airlines, damaging steering linkage, or blowing tyres

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