Oregon Combination Practice Test 1
15 questions covering combination content, drawn from the FMCSA-aligned CDL question pool and the Oregon Commercial Driver Manual.
Mode:
Study mode: See the correct answer, hints, and detailed explanation after each question.
What this test covers
The Combination Vehicles knowledge test has 20 to 30 multiple-choice questions with an 80% passing score. 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.