CDL Air Brakes Practice Test Results

Question 1
51% answer correctly
When is comes to stopping power, front wheel brakes __________ conditions.
Vary with
Show greater stopping power when lightly loaded
Operate poorly when under load
Show greater stopping power in bad weather
Question 2
55% answer correctly
Dual parking control valves are used in which of the following circumstances?
During emergencies
While parked
During routine operation
When air pressure is at its maximum
Question 3
76% answer correctly
For air brakes, the cut-out level is:
The minimum air pressure for the air storage tanks
The average air pressure maintained in the air storage tanks
The level at which the air compressor will stop pumping air into the air storage tanks
The level at which the air compressor will start pumping air into the air storage tanks