Is the CDL practice test free?

Yes. Every practice question on ELDT.IO is free, with no login or signup required.

How many CDL practice questions are there?

662 questions across 8 categories: General Knowledge, Air Brakes, Combination Vehicles, Hazmat, Tanker, Doubles/Triples, Passenger, and School Bus.

Are these the same questions as my state's CDL knowledge test?

No test provider publishes the real exam questions. These are written from the same source material your state's test is based on, the AAMVA CDL Manual and the relevant federal regulations (49 CFR Parts 383 and 172), each with a regulation citation and an explanation.

Do I need an account to take a practice test?

No. Every question page is open to anyone, no account required.

Free CDL Practice Tests

662 questions, 8 categories, no login required

Every question below cites its federal regulation and includes a plain-English explanation for every answer choice, not just the correct one. Sourced from the AAMVA CDL Manual and the relevant sections of 49 CFR. Pick a category to start.

General Knowledge

72 free questions

Core topics every CDL applicant is tested on: safe driving practices, vehicle systems, and basic vehicle control.

Air Brakes

51 free questions

Air brake systems, required knowledge for most Class A and Class B CDLs.

Combination Vehicles

72 free questions

Coupling, stability, and combination-vehicle inspection, required for a Class A CDL.

Hazmat (H) Endorsement

101 free questions

The hazmat table, placarding, shipping papers, and emergency response for the Hazmat (H) endorsement.

Tanker (N) Endorsement

121 free questions

Tank vehicle handling, surge, and inspection for the Tanker (N) endorsement.

Doubles/Triples (T) Endorsement

39 free questions

Coupling and handling multiple trailers for the Doubles/Triples (T) endorsement.

Passenger (P) Endorsement

80 free questions

Passenger-carrying vehicle rules for the Passenger (P) endorsement.

School Bus (S) Endorsement

126 free questions

School bus-specific loading, railroad crossing, and evacuation rules for the School Bus (S) endorsement.

Done practicing? Get your real ELDT certificate.

These practice questions prepare you for the CDL knowledge test, but ELDT theory training is a separate federal requirement your DMV checks before your skills test. $15 once, reported to the FMCSA registry instantly.

See ELDT Courses ($15)