Practice question

After a vehicle is started, warning lights and buzzers:

  1. Should stay on for several minutes.
  2. Should turn off within a few seconds.
  3. Should stay on until manually turned off.
  4. Should remain on.

Answer: B — Should turn off within a few seconds.

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

Practice more: Illinois CDL Double Test 2 →