Question

What will happen right away if the service line comes apart while you are driving a combination vehicle but the emergency line stays together?

A) The trailer's tank will exhaust through the open line
B) The emergency trailer brakes come on
C) Nothing is likely to happen until you try to apply the brakes

Answer 1

If the service line comes apart while driving a combination vehicle, nothing will likely happen until attempting to apply the brakes.

Step-by-step explanation:

If the service line comes apart while you are driving a combination vehicle but the emergency line stays together, nothing is likely to happen until you try to apply the brakes. This is because the service line is responsible for applying the brakes on the trailer, while the emergency line is used as a backup in case the service line fails. Only when you attempt to use the brakes will you notice that there is a problem with the service line being disconnected.