Red Seal Transport Trailer Technician Practice Exam

Question: 1 / 400

What is the role of a kingpin in a fifth-wheel trailer?

To provide stability during transport

To connect the trailer to the towing unit

The role of the kingpin in a fifth-wheel trailer is to connect the trailer to the towing unit, typically a truck or a tractor. The kingpin is a pivotal component that is designed to slide into the fifth-wheel coupling mechanism located on the towing vehicle, creating a secure connection between the two. This connection allows for the transfer of weight and stability during transit, ensuring that the trailer follows the towing vehicle effectively. The integrity of this connection is essential for safe towing and maneuverability, as it keeps the trailer properly aligned with the towing unit.

While stability, load security, and aerodynamics are important aspects of trailer design and operation, they are not the primary functions of the kingpin itself. The kingpin specifically focuses on the coupling aspect, making it crucial for efficient and safe towing of fifth-wheel trailers.

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To secure the load within the trailer

To improve aerodynamics of the trailer

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