Practice question

What is the purpose of checking the coupling (fifth wheel or drawbar) before departing in a heavy combination vehicle?

  1. To verify the trailer registration
  2. To ensure the coupling is correctly engaged and locked, preventing the trailer from detaching during travel
  3. To test the trailer's braking system
  4. To lubricate the drive axle

Answer: B — To ensure the coupling is correctly engaged and locked, preventing the trailer from detaching during travel

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Practice more: ACT Heavy Vehicle Knowledge Test Practice Questions - Heavy Vehicle Knowledge Test (Rigid Combination Road Rules Knowledge Test) Exam →