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2026 Free Arkansas DMV Class A CDL Knowledge Test 2
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Question Number 47
47. How is water and compressor oil removed from the bottom of an air storage tank?
The water and oil are siphoned out of the tank.
A drain valve is opened to remove the water and oil from the tank.
The water and oil are removed automatically as the brakes are used.
A sponge is used to soak up the water and oil.
✔ Correct Answer:
A drain valve is opened to remove the water and oil from the tank.
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