California CDL Air Brakes Test

In which order should you typically drain the air storage tanks?

Any order is fine Drain each tank fully, opening the drain valve until no more air, oil, or water comes out — most drivers start with the wet tank Only drain the secondary tank Drain them only after parking on a hill

Correct Answer:

Drain each tank fully, opening the drain valve until no more air, oil, or water comes out — most drivers start with the wet tank

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