Home › CDL Practice Tests › Combination Vehicles Questions › Question 22
Before coupling, why inspect the fifth wheel for damaged or missing parts?
- A.Inspection is only needed once a year
- B.Damage matters only when the trailer is empty
- C.The fifth wheel is not a load-bearing part
- D.A cracked plate, worn jaws, or missing parts can fail to hold the kingpin securely
Correct answer
D. A cracked plate, worn jaws, or missing parts can fail to hold the kingpin securely
Why
The fifth wheel carries vertical load and all the pulling and braking forces between the units. Any structural defect there directly threatens the connection.
Manual topic: Combination Vehicles - Coupling · From the Combination Vehicles practice bank (CV-022).