What should you look for on the trailer frame and crossmembers during inspection?

• A.Only the color of the undercoating
• B.The manufacturer's plate and nothing else
• C.Cracks, bends, broken welds, and holes or damage that weakens the structure
• D.Frame checks are only required at the annual inspection

Why

The trailer frame carries the cargo and ties the axles and coupler together. Structural cracks found on a pre-trip are out-of-service defects, not items to watch over the trip.

Manual topic: Combination Vehicles - Trailer Inspection · From the Combination Vehicles practice bank (CV-167).

Practice this subject as a full test

More Combination Vehicle Inspection questions

• After coupling, where should the fifth wheel locking jaws be closed?
• You see a visible space between the trailer apron (upper coupler plate) and the fifth wheel skid plate after coupling. What does this most likely mean?
• When inspecting the landing gear during a pre-trip inspection of a combination vehicle, what should you check?
• When inspecting the fifth wheel itself, which condition is a defect that must be fixed before driving?
• Why should the fifth wheel skid plate be kept properly greased?