During the whole vehicle air brake check, in what general order should the steps happen?
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Correct!
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Correct answer to question 89 (General Knowledge): Build up full air pressure first, then test the warning devices and brake application, not the other way around
Why
The whole vehicle check depends on having full air pressure available before you can meaningfully test the warning devices and how the brakes actually apply, so pressure comes first.
Updated: November 2026