You are coupling a semi-trailer to your tractor but have not yet backed under it. The trailer is at the right height if
a) The end of the kingpin is even with the top of the fifth wheel
b) It will be raised slightly when the tractor is backed under it
c) The kingpin is about 1 1/4 inches above the fifth wheel
Answer: b) It will be raised slightly when the tractor is backed under it
If the answers is incorrect or not given, you can answer the above question in the comment box. If the answers is incorrect or not given, you can answer the above question in the comment box.