CDL permit practice test

The commercial learner's permit (CLP) is the first thing you earn on the way to a CDL, and the test behind it is the general knowledge test. Practice it here, then add the tests your class and endorsements require.

CDL Permit — General Knowledge Question 1 of 10

What does an anti-lock braking system (ABS) do?

What the permit test actually is

There is no separate "permit exam". The CLP is issued when you pass the general knowledge test — the one above — together with whichever additional knowledge tests your vehicle needs. The permit then lets you drive a commercial vehicle with a CDL holder beside you while you prepare for the skills test.

  • Every applicant: general knowledge.
  • Class A: add combination vehicles — that pairing is what makes it Class A.
  • Anything with air brakes: add air brakes — skip it and the license carries an L restriction.
  • Endorsements (hazmat, tanker, passenger, school bus, doubles/triples) each have their own test — see the full list.

After you pass

The permit has to be held at least 14 days before the skills test — a federal minimum that some states extend. That window is when Entry-Level Driver Training and the pre-trip inspection happen. The three-week study plan lays the whole sequence out, and what a CDL costs covers the permit fee alongside everything else.

Permit practice by state

The knowledge test is federal, but the permit is issued by your state — fees, hold times and paperwork differ. Each state page pairs the practice test with that state's own steps.

Frequently asked

Is the CDL permit test the same as the CDL test?
The commercial learner’s permit (CLP) is earned by passing the same general knowledge test, plus air brakes and any endorsement tests you need. The permit lets you practice with a CDL holder; the skills test comes later and turns the permit into the license.
How long do I have to hold the permit?
Federal rules require the CLP to be held at least 14 days before you can take the skills test. Some states set longer hold times — check your state page below.
How much does the permit cost?
Permit fees run roughly $10–$40 depending on the state. Training, not the permit, is the line item that decides what a CDL really costs.
Which permit tests does Class A need?
General knowledge plus combination vehicles — that pairing is what makes it Class A. Nearly everyone also takes air brakes to avoid the L restriction.