Texas Doubles/Triples Practice Test 2
40 questions covering doubles/triples content, drawn from the FMCSA-aligned CDL question pool and the Texas Commercial Motor Vehicle Driver Handbook (DL-7C).
What this test covers
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 Most states do not publish a question count for it, and passing it qualifies you without making triples legal on every route.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.
Sample Doubles/Triples questions
Preview of what is on Practice Test 2. Get it with Pro to take the full 40-question test.
How do you check that air actually reaches all the trailers in a double or triple?
A second trailer has no spring brakes. How do you set its brakes before coupling?
Before backing under the second trailer, how should its height be set?