A system air pressure loss occurs on a trailer resulting in a gradual pressure bleed down.Which of the following will occur FIRST?

Question

Quizplus · Accepted Answer

Spring brakes on trailers are designed to automatically apply when air pressure drops to a certain level, typically around 20 to 45 psi, to ensure the vehicle can be safely stopped. The specific pressure mentioned, 60 psi, is within the range where spring brakes begin to apply, which usually happens before other measures such as the tractor-protection valve cutting the service signal or supply.

A System Air Pressure Loss Occurs on a Trailer Resulting