CDL Air Brakes Practice Test Results

Question 1
66% answer correctly
In vehicles equipped with air brakes, parking brakes are:
Spring brakes
Disc brakes
Rotor brakes
Air brakes
Question 2
48% answer correctly
On large buses the low pressure warning signal will trigger at what psi?
60
80 to 85
60 to 65
100
Question 3
89% answer correctly
Manual air tank drains should be emptied how often?
Monthly
Daily
Hourly
Weekly