Texas CDL study: Doubles/Triples questions
45 questions from the TX CDL path, each with an explanation after you answer. Part of the Texas CDL Doubles/Triples practice test.
A separate written exam at the federal 80% pass mark. Most states do not publish a question count for it, and passing it qualifies you without making triples legal on every route. Questions cover coupling and uncoupling procedures for double and triple trailers, rearward amplification (crack-the-whip effect), inspection of multiple trailers and their connections, proper trailer order (heaviest trailer closest to the cab), rollover risks, braking distances for longer combinations, and the specific handling differences between doubles and triples.