- A Just unhook the rear trailer
- B Follow the reverse of the coupling procedure carefully Correct answer
- C Disconnect everything at once
- D Drive away with brakes set
Why this is the correct answer
Reverse the coupling sequence: secure rear trailer, uncouple, secure dolly, uncouple lead trailer.
How this topic appears on the test
The Doubles & Triples CDL exam covers Coupling 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 Coupling section and re-read the relevant subchapter. Then come back and run through the rest of the Doubles & Triples practice exam.
For drivers preparing for the Doubles & Triples 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.