Which of the Following Best Describes the Functions of a Tractor

question 66

Multiple Choice

Which of the following best describes the functions of a tractor protection valve (TP) ?

• A) pressure protects the tractor air supply in the event of loss of pressure in a trailer
• B) routes trailer supply air and service application signal to the trailer pneumatic circuits
• C) blocks service signal air to the trailer until trailer air supply is activated
• D) all of the above

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