2026 South Carolina Pretrip CDL Practice Test 3

When checking the air and electrical lines between the tractor and the trailer what should you be checking for?

The connections and lines. The connection at the tractor, the lines for breaks cracks frays, and the connection to the trailer. The connection at the tractor, the lines for breaks cracks frays, the connection to the trailer, and that none of these are leaking. The connections and for leaks.

Correct Answer:

The connection at the tractor, the lines for breaks cracks frays, the connection to the trailer, and that none of these are leaking.

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