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ELDT.Courses
Free for Every CDL Student

Free practice tests for every CDL knowledge exam.

DMV-style practice tests for General Knowledge, Air Brakes, and Combination Vehicles — built by an FMCSA-registered training provider. Unlimited attempts, no signup, valid in all 50 states.

No signup required Unlimited retakes All 50 states Free forever
Available Now

Pick a test. Start now.

Each practice test draws from a question bank built from real federal source material. Take it as many times as you want — the questions shuffle every attempt.

General Knowledge practice test
Free Practice Test

General Knowledge

The foundation knowledge test required for every CDL applicant. Vehicle inspection, driving safely, transporting cargo, and the federal rules every commercial driver needs to know cold.

Air Brakes practice test
Free Practice Test

Air Brakes

Required for any CDL with a vehicle equipped with air brakes. System components, dual air brake systems, inspection procedures, and the emergency rules that keep loaded trucks under control.

Combination Vehicles practice test
Free Practice Test

Combination Vehicles

Required for every Class A applicant. Coupling and uncoupling, fifth-wheel inspection, the unique handling of combination vehicles, and the emergency procedures specific to a tractor-trailer.

Why We Make Them Free

No paywall on the basics.

01 · Built Right

Real federal source material

Every question is built from primary FMCSA regulations and the CDL manuals every state's DMV uses. No recycled internet quizzes. No outdated questions. The answer keys cite the actual rule.

02 · Drivers First

Help before the paywall

Permit prep shouldn't cost $50 just to find out if you're ready. Take the practice tests, take them again, and walk into the DMV knowing what you're walking into. If you eventually want full ELDT theory, our paid courses are here.

03 · Same Author

One instructor across everything

The same working trucking instructor who built our paid ELDT courses wrote these practice tests. Same standards, same plain-English explanations, same understanding of what actually matters on the road.

Need the full ELDT theory course?

The free practice tests are great prep for the DMV permit exam. If you're getting your CDL for the first time, federal law also requires FMCSA-approved ELDT theory training — and that's where our paid courses come in. TPR submission included with every enrollment.

Browse Paid Courses →
FMCSA-approved · TPR submission included · Self-paced · Mobile-friendly