Practice question

When checking air brake lines during a pre-trip inspection, the driver should look for:

  1. Lines that are properly color-coded only
  2. Cuts, cracks, abrasion damage, and that lines are properly secured and not in contact with hot surfaces
  3. Only whether the lines are connected at both ends
  4. Whether the lines are made of rubber or metal

Answer: B — Cuts, cracks, abrasion damage, and that lines are properly secured and not in contact with hot surfaces

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

Practice more: WI CDL General Knowledge Practice Questions - Wisconsin Commercial Driver License General Knowledge Test Exam →