Florida CDL Double/Triple Trailers Practice Test

On the Florida CDL Doubles and Triples test, what should you know about tractor protection valve check?

The trailer air supply control should pop out in the manufacturer-specified low-pressure range, usually 20 to 45 psi It should stay in at zero psi It should pop out only above 100 psi It is checked by lowering landing gear

Correct Answer:

The trailer air supply control should pop out in the manufacturer-specified low-pressure range, usually 20 to 45 psi

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