With 120 psi at the power unit, what is the pressure at the brake chamber using the hand control valve?

a) 65 psi


b) 120 psi


c) Depends on the hand control application


d) Depends on the length of the trailer


I have an exam and I'm completely stuck on this question!With 120 psi at the power unit, what is the pressure at the brake chamber using the hand control valve?
The trolley brake (hand control) can be lightly applied or pulled all the way for full application.





Therefore.....With 120 psi at the power unit, what is the pressure at the brake chamber using the hand control valve?
If there is a question, there is an answer in you reference material. Go back %26amp; read the section.





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