CDL Air Brakes Practice Test Results

Question 1
50% answer correctly
Modulating control valves are used to:
Apply the spring brakes gradually
Apply the air brakes gradually
Apply the spring and air brakes together
Switch between spring and air brakes
Question 2
82% answer correctly
Air brake systems consist of which three components?
Duty, parking and emergency brakes
Standard, parking and emergency brakes
Parking and emergency brakes
Service, parking and emergency brakes
Question 3
59% answer correctly
Maximum leakage rates are more than __________ psi in __________ minutearray(s).
3, 1
3, 2
2, 2
2, 1