Doubles/Triples · Question 17

Question 17 of 120

While coupling a second trailer using a converter dolly, what should you confirm before driving away?

Pick an answer

Correct!

Not quite. The correct answer is highlighted.

Correct answer to question 17 (Doubles/Triples): That the dolly's tow bar, safety chains, and air and electrical lines are all properly connected and secured

Why

A dolly coupling isn't complete until the tow bar, safety chains, and both the air and electrical lines are all connected, since missing any one of them leaves a real safety gap.

Updated: November 2026

Practice it in test 130 questions · pass with 24 (80%)