California CDL Combination Vehicles Practice Test

Practice the full Combination Vehicles question set for the California CDL knowledge test. Every question comes with an instant explanation and its manual topic, so you learn the rule behind the answer instead of memorizing letters.

Free and unlimited. Every answer is explained, and your progress is saved only in your browser — no account needed.

How it works

Answer one question at a time. You will see immediately whether you were right, plus a short explanation and the manual topic for every question. At the end you get your score and can re-drill only the questions you missed.

250 questions · Topics: Fifth Wheel & Coupling Steps, Uncoupling Steps & Safety, Trailer Sway, Rollover & Rearward Amplification, Off-Tracking & Turning Wide, Coupling Equipment (Kingpin, Apron, Locking Jaws, Safety Latch), Combination Braking, Skids & Jackknife Prevention, Combination Vehicle Inspection, Railroad Crossings with Long Vehicles, Trailer ABS & Brake Checks, Weight, Space & Doubles/Triples Handling, Gladhands, Air Lines & Pintle Hook/Dolly.

About this practice test

This set drills the Combination Vehicles topics from the official CDL manual: fifth wheel & coupling steps, uncoupling steps & safety, trailer sway, rollover & rearward amplification, off-tracking & turning wide, coupling equipment (kingpin, apron, locking jaws, safety latch), combination braking, skids & jackknife prevention, combination vehicle inspection, railroad crossings with long vehicles, trailer abs & brake checks, weight, space & doubles/triples handling, gladhands, air lines & pintle hook/dolly. The real California test is given by the California Department of Motor Vehicles (DMV); format and passing scores are summarized on the California CDL hub page.

When this set feels easy, switch to the Exam Simulator for a timed, no-feedback run, or review with flashcards.

Frequently asked questions

How many questions are on the California Combination Vehicles test?

The Combination Vehicles test is typically about 20 multiple-choice questions in most states.

What score do I need to pass?

Most states, including the typical California standard, require about 80% correct on CDL knowledge tests. Confirm the current rule in the official manual.

Are these the actual test questions?

No. These are original practice questions written from the same public manual topics the real test covers. They are designed to teach the material, not to reproduce the exam.