Exam (elaborations)
CDL Combination Vehicle Practice Test Questions & Answers Latest Updated 2024/2025 (GRADED)
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You supply air to the trailer tanks by: A. pushing in the trailer air supply valve B. pulling out the trailer air supply valve C. connecting the service air line 2. Loss of air pressure in the emergency line causes: A. the relay valves to close B. an increase in air pressure to the service li...
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