Practice question

If a parked trailer does not have spring brakes, you should keep the trailer from moving by:

  1. Using the air brakes.
  2. Using wheel chocks.
  3. Parking near a wall.
  4. Parking on a slight incline.

Answer: B — Using wheel chocks.

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

Practice more: District Of Columbia CDL Combination Test 1 →