9/10/2023 0 Comments California cdl air brake test![]() ![]() The Z restriction keeps you from driving air brakes-equipped vehicles if you drove a vehicle with an air-over-hydraulic brakes system during the CDL road skills test.The L restriction prohibits you from driving vehicles with air brakes systems if you fail the air brakes knowledge test, can’t identify the system components or conduct an inspection, or don’t drive a vehicle with air brakes during the road skills test.Until you pass the tests, your CDL will have the L or Z restriction. The tests ensure that you have a general knowledge of the air brakes system and know how to properly inspect it and identify potential problems. Understanding how the air brakes system is essential to ensure it is properly functioning and when maintenance is required.ĭue to this, federal law requires that you pass the air brakes tests and hold the appropriate CDL before driving a vehicle with full air brakes. Air brakes are actually made up of three systems: an emergency brake, a parking brake and service brakes. They use compressed air and are a safe means of stopping heavy, large vehicles. The air brakes systems in commercial vehicles function differently than the brakes in your personal vehicle. ![]()
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