2024 WV CDL Practice Test: Double and Triples - Test 3
Based on
2024 WV CDL Handbook
21. The trailer air supply control should pop out when the air pressure falls into what range?
A
10 to 20 psi.
B
20 to 45 psi.
C
10 to 30 psi.
D
30 to 55 psi.