What is the danger of having the trailer too high when coupling?
a.The landing gear may be too short
b.The trailer may not couple correctly and the tractor could end up under the trailer without the kingpin engaging the fifth wheel
c.The electrical cord will not reach
d.The air lines will be too tight
Explanation
If the trailer is too high when coupling, the tractor may go under the trailer without the kingpin properly engaging the fifth wheel. This can result in a false coupling where the trailer appears connected but is not secured, which could lead to separation while driving.