Why do large vehicles use air brakes? Question Why do large vehicles use air brakes? Answers Other brake systems squeak too loudly. Air braking systems are very effective. Air brakes are complicated. Air is free. Explanation Air brakes are an effective and safe way of stopping large and heavy vehicles, as long as they are maintained and used properly. This questions appears in the following tests: Minnesota Class A Knowledge Test Minnesota Air Brakes Oregon Air Brakes
