Practice question

When a tractor-trailer combination is stopping, when is 'folding' (jack-knifing) probable?

  1. When the trailer's brakes engage earlier than the tractor's brakes
  2. When the trailer's brakes engage later than the tractor's brakes
  3. Whenever the combination is travelling at 50 km/h in a built-up area
  4. Only when the trailer is empty

Answer: B — When the trailer's brakes engage later than the tractor's brakes

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