Home › CDL Practice Tests › Combination Vehicles Questions › Question 26
If the trailer is too high when you back under it, what is the main risk?
- A.The kingpin may go over the locking jaws or lock in a high position and later pull out
- B.The trailer will be too easy to lift
- C.The air lines will be too short
- D.The landing gear will raise itself
Correct answer
A. The kingpin may go over the locking jaws or lock in a high position and later pull out
Why
Height controls where the kingpin meets the jaws. Too high and the pin can miss, ride over, or false-lock, which is why a gap check after coupling is mandatory.
Manual topic: Combination Vehicles - Coupling · From the Combination Vehicles practice bank (CV-026).