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All air tanks must include:
A.  A drain valve.
B.  A lock.
C.  A trap door.
D.  A warning sticker.
Air brake system tanks must contain drain valves. These valves are used to drain accumulated oil and water from the tanks and may be either manually or automatically operated.
Answer Statistics
9.14 % of our users get this question wrong.
This question's difficulty is Medium

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