- A Is not used
- B Is decorative
- C Should be checked for proper extension and retraction Correct answer
- D Is removed in winter
Why this is the correct answer
Crossing arms force students to walk in view of the driver. Verify operation in pre-trip.
How this topic appears on the test
The School Bus CDL exam covers Pre-trip as a recurring theme. Test-writers favor questions that probe whether the applicant has internalized the safe operating procedure, not merely memorized the rule. When you encounter a question on this topic, slow down and verify that the answer you've chosen describes what a careful, defensive driver would actually do — not what is technically permissible.
If you missed this question, that's exactly the right outcome of a practice session: the goal is to surface gaps before the actual test. Open your state CDL manual to the Pre-trip section and re-read the relevant subchapter. Then come back and run through the rest of the School Bus practice exam.
For drivers preparing for the School Bus CDL exam, additional context — including federal manual excerpts, employer hiring practices, and DOT medical guidance — is widely available from industry resources. Continue reading on a recommended industry resource for further detail. Always cross-check anything you read with the current edition of your state CDL manual, since enforcement guidance is updated periodically.