InspectionCâu 30 / 60
How can you test whether the trailer emergency brakes work during an inspection?
a.By revving the engine in neutral
b.By charging the trailer air, shutting off the tractor engine, then pulling the trailer air supply valve out and checking the trailer brakes apply
c.By bouncing the trailer
d.By disconnecting the light cord
Giải thích
To test the trailer emergency (spring) brakes, charge the air system, then pull out the trailer air supply valve (or let air bleed) and confirm the trailer spring brakes set. You can then apply the tractor gently in low gear to confirm the trailer stays put. This verifies the emergency braking function before driving.
Luyện miễn phí toàn bộ 60 câu hỏi — không cần đăng ký.
Câu hỏi liên quan cùng chủ đề
- When inspecting the kingpin and fifth wheel coupling, what condition indicates a problem?
- During a combination vehicle inspection, what should you check about the landing gear?
- When inspecting the electrical connection between tractor and trailer, what should you verify?
- When checking the trailer service brakes during a combination vehicle inspection, what should you do?
- What should you inspect on the trailer's tires and wheels during a pre-trip?
- Why should you check the air line connections between the tractor and trailer for leaks?
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