CDL Practice Question #379

Coupling order for a set of doubles starts with:

Coupling the lead (front) trailer to the tractor first, charging air, then attaching the converter dolly to the rear of the lead trailer, then attaching the second trailer
Coupling the rear trailer first
Coupling the dolly first
It does not matter

Correct. Standard order: tractor + lead trailer first, charge air, then attach converter dolly behind lead trailer, then second trailer to dolly.

Why this question matters

This question is one of 50 in our Doubles/Triples 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.

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