Practice question

When encountering fog, you will be safest if you:

  1. Stay in the left lane.
  2. Don’t drive in the fog.
  3. Use your low beam lights.
  4. Follow the vehicle ahead of you closely.

Answer: B — Don’t drive in the fog.

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

Practice more: Massachusetts CDL Class B Knowledge Test 2 →