CDL Practice Question #219

A trailer that has been sitting may have:

Brakes that need careful adjustment, rust on the kingpin, or other issues that should be inspected
No issues — trailers are static
Built-in safety
Better brakes

Correct. Trailers idle for long periods can develop brake corrosion, kingpin rust, low tires, and other issues. Inspect carefully before use.

Why this question matters

This question is one of 55 in our Combination Vehicles 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.

Practice more

Full Combination Vehicles practice test
Combination Vehicles study guide
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