Practice question

Which statement is correct about tractor protection valve for New Jersey CDL doubles/triples operation?

The trailer air supply control should pop out in the manufacturer range, usually 20 to 45 psi
Check only the tractor dashboard gauge
Operate with air only to the first trailer
Use light cords instead of air lines

Answer: A — The trailer air supply control should pop out in the manufacturer range, usually 20 to 45 psi

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