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CDL Air Brakes Practice Test Results
Question 1
68% answer correctly
What are spring brakes used for?
Air brakes
Emergency and parking brakes
Trailer brakes
Cab brakes
Question 2
35% answer correctly
Automatic air tank drains should be emptied how often?
Daily
Monthly
Weekly
Never
Question 3
35% answer correctly
Automatic air tank drains should be emptied how often?
Monthly
Weekly
Never
Daily