When backing a bus, you should:
Correct. Sound the horn before backing. Use a helper to guide whenever possible — bus blind spots are large.
CDL Practice Question #405
Category: Passenger
Why this question matters
This question is one of 58 in our Passenger bank. The reasoning above comes directly from the AAMVA CDL Manual, the source document used by every U.S. state DMV. Memorizing the underlying rule — not just the letter answer — is what separates passing on the first attempt from a return trip and another fee.