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Air Break Practice Test

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#1. For inspecting the air brakes, when should you chock the wheels?

You should chock the wheels whenever the vehicle or a trailer might move on its own and hurt somebody: (1) if the cab will be unoccupied; (2) if you or someone else will be underneath the vehicle (say to inspect the brakes); and (3) when you must perform braking tests that require the brakes to be released; (4) when coupling or uncoupling a trailer.

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