While backing under a trailer to couple, you feel the tractor's frame bump hard into the trailer's nose before the fifth wheel engages. What does this suggest?

Pick an answer

1. The trailer was set too low for the fifth wheel and the coupling can still be trusted anyway without a recheck
2. This is a normal part of every coupling and needs no further check
3. The trailer height was set correctly and coupling proceeded normally
4. The trailer was set too high, so the tractor struck it instead of sliding underneath, and the coupling should be rechecked

Correct!

Not quite. The correct answer is highlighted.