Some air brake systems use alcohol:
Some air brake systems contain an alcohol evaporator. This device introduces alcohol into the braking system to inhibit the formation of ice.
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This question's difficulty is Medium
This questions appears in the following tests:
Colorado Practice test 2
District Of Columbia Practice test 16
Georgia Practice test 3
Georgia Practice test 16
New Hampshire Practice test 3
North Carolina Practice test 4
Pennsylvania Practice test 1
Wisconsin Practice test 16