Where should the 5th wheel locking lever be positioned?

Answer: B — Around the shank of the kingpin

The correct positioning of the 5th wheel locking lever is around the shank of the kingpin. This ensures that the tractor and trailer are securely connected, allowing for safe towing. When the locking lever is properly engaged around the kingpin, it locks the two components together, preventing any accidental disconnection while the vehicle is in motion. Positioning the locking lever in this manner is crucial for maintaining the structural integrity of the connection between the truck and trailer, which is vital for safety during transport. If the lever were positioned above the shank of the kingpin, it would not secure the connection effectively, leading to potential failure while on the road. Loosely attaching the lever near the frame or removing it entirely would create dangerous situations, as these actions would compromise the securement of the trailer.