Florida CDL Double/Triple Trailers Practice Test

A Florida CDL applicant is reviewing tractor protection valve check. Which statement is correct?

It is checked by lowering landing gear 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

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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