Transporte y Autos
Exámenes CDL y Endosos
The Commercial Driver's License (CDL) knowledge tests qualify you to drive commercial vehicles. Beyond the general knowledge test, endorsements — HazMat, Air Brakes, Combination, Passenger, Tanker and School Bus — each add a written test for the type of driving or cargo you'll handle. This hub gathers the CDL general test and every endorsement PrepPass covers so you can practice the exact tests your license and job require. Practice questions and mock exams are free.
7 exams
Frequently asked questions
What are CDL endorsements?
Endorsements are add-ons to a commercial license for specific driving. Each has its own written knowledge test — for example HazMat for hazardous materials, Passenger for buses, Tanker for liquid cargo, and Air Brakes and Combination for the vehicle systems you'll operate. Practice the general test first, then the endorsements your job needs.
How many questions are on the real exam?
It depends on the specific exam and, for state-issued licenses, on your state. Open the exam you need from the list on this page — each exam page shows its current format and question count, kept in line with the exam board's published outline.
Are these practice tests free?
Yes. Every practice question and full-length timed mock exam on PrepPass is free, with no signup required. The only optional paid product is a $9.99 study-guide eBook offered for some exams.