Home › CDL Practice Tests › Combination Vehicles Questions › Question 161
What should you check about the kingpin during a trailer inspection?
- A.That it is painted the same color as the trailer
- B.That it points slightly toward the rear axle
- C.Nothing; the kingpin never wears
- D.That it is not bent, cracked, or worn down, since the locking jaws depend on its shape to hold
Correct answer
D. That it is not bent, cracked, or worn down, since the locking jaws depend on its shape to hold
Why
Every coupling loads the kingpin, and a bent or worn pin can slip out of jaws that look locked. Inspecting it is part of inspecting the trailer, not just the tractor.
Manual topic: Combination Vehicles - Coupling Inspection · From the Combination Vehicles practice bank (CV-161).