Practice question

What is the purpose of wheel chocks when a heavy vehicle is parked on a gradient?

  1. To prevent other vehicles from parking too close
  2. To prevent the vehicle from rolling if the parking brake fails or the driveline is disengaged
  3. To indicate the vehicle's maximum legal axle mass
  4. To cool the brakes after a downhill descent

Answer: B — To prevent the vehicle from rolling if the parking brake fails or the driveline is disengaged

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

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