Before coupling the second trailer onto a converter dolly, what should you confirm about the dolly's tow bar height?

Pick an answer

1. Tow bar height never matters as long as the pin is present
2. That the tow bar is level with the trailer's kingpin coupler, since a mismatched height can prevent a proper lock
3. That the tow bar is fully extended to its maximum length before attempting to couple to the trailer so it has plenty of slack
4. That the tow bar is painted the same color as the trailer

Correct!

Not quite. The correct answer is highlighted.