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2024 WA CDL Practice Test: Double and Triples - Test 3

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