Pass Your CDL Class B Exam with Confidence
Prepare for your Class B CDL permit with simple study guides, realistic practice questions, and exam-style tests built for first-time CDL students.
Get Ready for Your Class B CDL Permit
A Class B CDL allows you to operate large single vehicles with a gross vehicle weight rating of 26,001 pounds or more. These vehicles may tow a trailer, but the trailer must not exceed 10,000 pounds.
PrepCDL helps you study the topics you need for the written exam, understand the rules in plain English, and practice until you feel ready for test day.
- Straight trucks and box trucks
- Large buses, city buses, and tour buses
- Dump trucks, garbage trucks, and delivery trucks
Master the Tests Class B Drivers Need
Study and practice the required written tests for your Class B permit — general knowledge and air brakes.
General Knowledge
50 practice questions
Study safe driving, vehicle inspections, basic control, shifting, road signs, cargo safety, and the rules every CDL driver must know.
Air Brakes
25 practice questions
Learn air brake parts, system checks, warning signals, inspection rules, and safe braking procedures.
See If You're Ready for the CDL Exam
Try a sample question from our practice test and see how PrepCDL explains the topics you need to pass.
What is the most important reason for doing a vehicle inspection?
Why Choose PrepCDL?
Everything you need to study smarter, practice faster, and walk into your CDL exam prepared.
1000+ Practice Questions
Practice with exam-style questions covering CDL rules, safety, inspections, endorsements, and real test topics.
State-Specific CDL Prep
Study material tailored to your state’s CDL manual so you focus on the rules that matter for your test.
Realistic Exam Practice
Build confidence with practice tests, randomized questions, progress tracking, and detailed answer explanations.
CDL Prep by State
Pick your state for practice tests and study guides aligned with your local CDL exam.
All states
Frequently Asked Questions
How many questions are on the CDL Class B exam?
The Class B written exam usually includes the General Knowledge test. If your vehicle has air brakes or you plan to drive passengers or school buses, you may need additional tests. Most states require a score of at least 80% to pass.
What vehicles can I drive with a Class B CDL?
A Class B CDL is commonly used for straight trucks, box trucks, dump trucks, garbage trucks, cement trucks, city buses, school buses, and other large single vehicles.
Do I need a passenger endorsement for a city bus job?
Yes. If you plan to operate a vehicle designed to carry passengers, you usually need a Passenger endorsement. For school buses, you typically need both Passenger and School Bus endorsements.
Can I upgrade from Class B to Class A later?
Yes. Many drivers start with a Class B CDL and later upgrade to Class A if they want to drive tractor-trailers or larger combination vehicles.
Ready to Pass Your Class B Exam?
Start practicing today, then unlock lifetime access to every Class B topic, endorsement, and study guide with one simple payment.
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