Practice question

For the Georgia CDL Air Brakes knowledge test, what is the function of the wet tank (supply or service reservoir)?

  1. It cools brake fluid
  2. It is the first storage tank where moisture collects before air moves to the other tanks
  3. It supplies air only to the trailer
  4. It activates the parking brakes

Answer: B — It is the first storage tank where moisture collects before air moves to the other tanks

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