Practice question

Which is the most reliable indicator that the trailer is approaching a jackknife angle during a slow maneuver?

  1. Sound of the engine
  2. Visual angle between the tractor and trailer approaching 90 degrees through mirrors
  3. Air pressure gauge dropping
  4. The aerial bedding light

Answer: B — Visual angle between the tractor and trailer approaching 90 degrees through mirrors

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

Practice more: NFPA 1002 Driver/Operator - Tiller Practice Questions - NFPA 1002 Standard for Fire Apparatus Driver/Operator - Tiller Certification Exam Exam →