What should you do if the fifth wheel locking jaws are not securely closed around the kingpin?
a.Drive slowly to the nearest repair shop
b.Do not drive the vehicle until the coupling is properly secured
c.Use safety chains as a temporary fix
d.Apply more grease to help the jaws close
Explanation
You must never drive a vehicle if the fifth wheel locking jaws are not fully closed around the kingpin. An improperly secured coupling can result in the trailer separating from the tractor while driving, which is extremely dangerous.