This is the "Big One". Before you can get any endorsement, you must pass the CDL General Knowledge Practice Test requirements at your local DMV.
It’s not just about common sense. The exam covers specific federal regulations regarding vehicle inspection, crash procedures, and cargo safety. Our 2026 guide breaks down exactly what you need to study.
Many new drivers fail their first attempt because they underestimate the technical details. The official manual is 180 pages long, but the actual test focuses heavily on three core areas. A high-quality CDL General Knowledge Practice Test helps you identify your weak spots before you pay the testing fee.
In 2026, the exam has updated questions regarding distracted driving laws and modernized pre-trip inspection protocols.
You must know *why* you are checking parts. Questions will ask about tire tread depth (4/32" for steer tires), air brake leak rates, and fluid levels.
Memorize the stopping distance formulas. At 55 mph, a heavy truck takes the length of a football field to stop.
Even if you don't load the truck, you are responsible for it. You need to know the rule: 1 tie-down for every 10 feet of cargo.
Test your readiness with these real examples from our CDL General Knowledge Practice Test database.
Q1: You are driving a 50-foot truck at 50 mph. What is the minimum following distance?
Correct Answer: C (6 seconds)
The Logic: 1 second for every 10 feet of vehicle length (5 seconds). PLUS 1 second for speeds over 40 mph. Total = 6 seconds.
Q2: Which of these statements about drinking alcohol is true?
Correct Answer: C
The Logic: The liver processes alcohol at a fixed rate. Nothing accelerates this process.
The real test has 300+ possible questions. Our app simulates the actual DMV exam algorithm to ensure you are 100% ready.
Start Full Practice Test