CDL Air Brakes Practice Test Results

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