Question:
If you have a major leak in the service line of your air brakes, the air pressure will _____.
A
lower the tank pressure quickly
explanation
You may not notice a major leak in the service line until you try to put the brakes on. Then, the air loss from the leak will lower the air tank pressure quickly. If it goes low enough, the trailer emergency brakes will come on.
[Commercial Driver's License Manual]
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