Home › CDL Practice Tests › Combination Vehicles Questions › Question 112
Which kingpin defect means you should not couple to that trailer?
- A.A kingpin with fresh grease on it
- B.A kingpin that is clean and straight
- C.A kingpin that is bent, cracked, or badly worn
- D.A kingpin with a standard shape
Correct answer
C. A kingpin that is bent, cracked, or badly worn
Why
A damaged kingpin can pull out of even perfect jaws or snap under load. Grease and cleanliness are good; cracks, bends, and excess wear are stop signs.
Manual topic: Combination Vehicles - Coupling Equipment · From the Combination Vehicles practice bank (CV-112).