The air brakes endorsement applies to applicants who wish to drive a vehicle with air brakes in Class A, B, or C CDL. To drive a vehicle with air brakes, you must pass the air brake component of the Louisiana CDL knowledge test. The LA CDL air brakes test consists of 25 questions, and you'll need at least 20 correct answers to pass (80%). The test covers the information found in the air brakes section of the Louisiana CDL Manual. Take this LA CDL practice test now to prepare for the actual air brakes test!
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1. You should drain your air tanks:
at the beginning of each trip.
at the end of each working day.
every month.
at least once a week.
2. During a trip you should check:
temperature gauges.
pressure gauges.
All of the above.
3. Vehicles with air brakes require more stopping distance than vehicles with hydraulic brakes. Why?
It takes one half second or more for the air to flow through the lines to the brakes.
Air brakes use different brake drums.
Stopping distance for vehicles with air brakes is made up of six different factors.
When driving vehicles with air brakes, the average perception distance increases from 400 feet to 2200 feet.