Control & OperationCâu 70 / 120
You are coupling a tractor to a trailer. Which step comes immediately before backing under the trailer?
a.Raise the landing gear fully
b.Remove the wheel chocks
c.Perform the tug test
d.Connect the air lines, supply air to the trailer, and make sure the trailer brakes are locked
Giải thích
Charging the trailer air system and locking its brakes keeps the trailer from rolling as the fifth wheel slides under the apron. Raising the landing gear, removing chocks, and the tug test all come after the coupling is made.
Luyện miễn phí toàn bộ 120 câu hỏi — không cần đăng ký.
Câu hỏi liên quan cùng chủ đề
- You are backing a trailer and it begins to drift off your intended line. What is the correct correction?
- You are making a tight right turn at an intersection in a tractor-trailer. What is the correct technique?
- What is off-tracking, and why does it matter in turns?
- Before backing under a trailer, how should the trailer height be set?
- You are uncoupling a trailer in a yard. Which sequence is correct?
- After uncoupling, you notice the landing gear crank handle is left extended. Why must it be secured?
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