CDL Air Brakes Practice Test Results

Question 1
50% answer correctly
Modulating control valves are used to:
Switch between spring and air brakes
Apply the spring brakes gradually
Apply the air brakes gradually
Apply the spring and air brakes together
Question 2
82% answer correctly
Air brake systems consist of which three components?
Service, parking and emergency brakes
Standard, parking and emergency brakes
Duty, parking and emergency brakes
Parking and emergency brakes
Question 3
81% answer correctly
The air compressor governor keeps the air pressure in the air storage tanks between __________ and __________ psi.
75, 100
1000, 1250
100, 125
750, 1000