Texas CDL study: Combination questions
50 questions from the TX CDL path, each with an explanation after you answer. Part of the Texas CDL Combination practice test.
Required for Class A, and a separate written exam at the federal 80% pass mark. Most states do not publish a question count for it. Questions cover coupling and uncoupling tractor-trailers, rollover prevention, jackknife causes and prevention, off-tracking, braking with a trailer, air brake connections (glad hands), proper use of the trailer hand valve, weight distribution, and the specific inspection procedures for fifth wheels, kingpins, and trailer connections. This is a core test for anyone seeking a Class A CDL.