Answer :

Final answer:

Trailer protection usually activates at 30 to 45 psi, which is not listed among the options provided, suggesting the question might have a mistake or is referring to a different system component.

Explanation:

The pressure that activates trailer protection in a truck's air brake system is typically set at around 30 to 45 psi (pounds per square inch), but the exact activation pressure can differ based on the specific vehicle's design and the manufacturer's settings. Since none of the options provided (60 psi, 80 psi, 100 psi, 120 psi) are within the usual activation range, it is possible that the question may contain incorrect values or is referring to a different component of the system. Trailer protection valves are essential for maintaining control over the trailer brakes in case of an emergency or a failure in the air brake system, ensuring safety.

Learn more about Trailer Protection Valve here:

https://brainly.com/question/28198291

#SPJ11

Thanks for taking the time to read What pressure activates trailer protection A 60 psi B 80 psi C 100 psi D 120 psi. We hope the insights shared have been valuable and enhanced your understanding of the topic. Don�t hesitate to browse our website for more informative and engaging content!

Rewritten by : Barada