Field answer
Direct answer
If fifth wheel jaws are not locked around the kingpin, the combination is not safe to move and the coupling procedure must be corrected and verified. Use the current equipment manual, code book, employer procedure, and qualified supervision before applying this on live work.
How to use this answer
Read the answer once, then prove it by choosing an answer in a practice question before looking at the explanation. If the miss repeats, tag the domain as Coupling and drill a smaller set before returning to mixed practice.