CDL Air Brakes Practice Test Results

Question 1
55% answer correctly
Dual parking control valves are used in which of the following circumstances?
During emergencies
During routine operation
When air pressure is at its maximum
While parked
Question 2
59% answer correctly
Maximum leakage rates are more than __________ psi in __________ minutearray(s).
3, 1
2, 2
2, 1
3, 2
Question 3
69% answer correctly
If the air compressor stops working, air brakes:
Can still be used several times
Cannot be used
Immediately fail
Can be used indefinitely