Vehicle InspectionCâu 18 / 120
You are performing the tug test after coupling. What are you actually checking?
a.That the fifth wheel locking jaws have fully closed around the kingpin and the trailer will not pull free
b.That the trailer brakes release quickly enough
c.That the landing gear is strong enough to hold the trailer
d.That the electrical cord carries enough current
Giải thích
With the trailer brakes locked, gently pulling forward proves the coupling is holding the kingpin. The tug test says nothing about brake release timing, landing gear strength, or the electrical circuit, each of which is checked separately.
Luyện miễn phí toàn bộ 120 câu hỏi — không cần đăng ký.
Câu hỏi liên quan cùng chủ đề
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- You notice oil or grease on the outside of a brake drum during your walkaround. Why does this matter?
- Which item is checked as part of the in-cab portion of the pre-trip inspection?
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Đội Ngũ Biên Tập PrepPass · Đối chiếu với Commercial Driver's License (CDL) General Knowledge Test · Quy trình kiểm tra