Technician A says frame rails are all made of high strength steel. Technician B says the ladder frame is comonly used on unibody vehicles. Who is correct?

Question

Quizplus · Accepted Answer

Both technicians are incorrect. Frame rails can be made of various materials including high strength steel, but also aluminum, magnesium, and composite materials. The ladder frame design is not commonly used on unibody vehicles, as a unibody chassis does not have a separate frame like a body-on-frame design.

Technician a Says Frame Rails Are All Made of High