Pass Your CDL Endorsement Exams with Confidence
Add the endorsements your driving career requires with simple study guides, realistic practice tests, and exam-style questions built for first-time CDL students.
Choose the Endorsements Your CDL Career Needs
CDL endorsements are extra qualifications added to your commercial license. They allow you to haul hazardous materials, operate tank vehicles, pull multiple trailers, or transport passengers and school children.
PrepCDL helps you understand which endorsements you need, study the right topics, and practice with questions that match the real exam format.
- Hazmat — Required to haul hazardous materials that need placards
- Tanker — Required for liquid or gas cargo in tank vehicles
- Doubles & Triples — Required to pull two or three trailers
- Passenger & School Bus — Required for buses and passenger vehicles
Explore Every CDL Endorsement
Pick the endorsement you need and start practicing with state-specific study material and realistic exam questions.
Hazmat
30 practice questions
Prepare for hazardous materials rules, placards, loading requirements, safety procedures, and emergency response.
Tanker
20 practice questions
Study liquid surge, tank inspections, loading and unloading rules, and safe handling of tank vehicles.
Doubles & Triples
20 practice questions
Learn coupling, uncoupling, trailer length limits, crack-the-whip risks, and safe handling of multiple trailers.
Passenger
20 practice questions
Study passenger safety, loading procedures, emergency exits, bus inspections, and safe operating rules.
School Bus
20 practice questions
Prepare for school bus rules, student safety, railroad crossings, loading procedures, and emergency evacuation.
See If You're Ready for a CDL Endorsement Test
Try a sample question from our practice tests and see how PrepCDL explains the topics you need to pass.
What three things do you need to know to decide which placards (if any) you need?
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
What is a CDL endorsement?
A CDL endorsement is an additional qualification on your commercial license that allows you to perform specialized driving tasks, such as hauling hazmat, operating tank vehicles, pulling multiple trailers, or transporting passengers.
How many questions are on CDL endorsement tests?
Most endorsement written tests include 20–30 questions, depending on your state. You typically need to score at least 80% to pass. PrepCDL matches the question count for each endorsement in your practice tests.
Do I need endorsements for every CDL job?
No. You only need the endorsements required for the vehicle and cargo you plan to operate. Many drivers start with core CDL tests and add endorsements as their career goals change.
Can I study endorsements before getting my CDL?
Yes. Many students study endorsement material while preparing for their base CDL permit. PrepCDL lets you practice any endorsement topic whenever you are ready.
Ready to Add Your CDL Endorsements?
Whether you need hazmat, tanker, passenger, or school bus qualifications, PrepCDL helps you study the right topics — with lifetime access for one simple payment.
One-time payment. No subscription required.