CDL Air Brakes Practice Test Results

Question 1
72% answer correctly
Spring brakes and air brakes should __________ be used together.
Always
Frequently
Never
Sparingly
Question 2
76% answer correctly
An air tank safety valve is typically set at how many psi?
125
100
150
200
Question 3
35% answer correctly
Automatic air tank drains should be emptied how often?
Daily
Never
Weekly
Monthly