CDL Air Brakes Practice Test Results

Question 1
51% answer correctly
When is comes to stopping power, front wheel brakes __________ conditions.
Show greater stopping power when lightly loaded
Vary with
Show greater stopping power in bad weather
Operate poorly when under load
Question 2
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 3
76% answer correctly
An air tank safety valve is typically set at how many psi?
125
150
200
100