When you check the lower fifth wheel, you do NOT need to check
a) That there are no missing parts
b) That you cannot see any space between the upper and lower fifth wheels
c) That the shut-off valves completely closed
d) Whether it has enough grease
Answer: c) That the shut-off valves completely closed
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.