CDL Air Brakes Practice Test Results

Question 1
72% answer correctly
Spring brakes and air brakes should __________ be used together.
Always
Sparingly
Frequently
Never
Question 2
76% answer correctly
An air tank safety valve is typically set at how many psi?
125
150
100
200
Question 3
43% answer correctly
A dual air brake system is one in which:
Two brake systems use the same set of brake controls
Two control systems that each have their own set of breaks
Two sets of brake controls operate a single brake system
Two brake systems that each have their own set of controls