CDL Air Brakes Practice Test Results

Question 1
69% answer correctly
If the air compressor stops working, air brakes:
Can still be used several times
Can be used indefinitely
Cannot be used
Immediately fail
Question 2
43% answer correctly
For vehicles that use air brakes, emergency and parking brakes:
Can only be air brakes
Must be a combination of mechanical and air brakes
Must be mechanical brakes
Are not required
Question 3
35% answer correctly
Automatic air tank drains should be emptied how often?
Weekly
Never
Monthly
Daily