2024 HI CDL Practice Test: Class A - Test 8
Based on
2024 HI CDL Handbook
12. The tractor protection valve should go from "normal" to "emergency" position when the air pressure falls into what range?
A
50-60 psi.
B
100-125 psi.
C
75-85 psi.
D
65-90 psi.
E
20-45 psi.