What is the function of the supply (wet) tank in an air brake system?
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Correct answer to question 78 (Air Brakes): It collects air directly from the compressor and lets moisture and oil settle out before air moves further into the system
Why
The supply tank, sometimes called the wet tank, is the first reservoir air reaches from the compressor, and it is where most moisture and oil condense out before air is distributed to the rest of the system.
Updated: November 2026
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