CDL Air Brakes Practice Test Results

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