LicenseReady

Commercial Driver’s License

Pass your CDL endorsement exam on the first try.

Free, state-specific practice tests for every CDL endorsement — General Knowledge, Air Brakes, Hazmat, Tanker, Doubles & Triples, Passenger, and School Bus. Every question is paraphrased from the public-domain FMCSA CDL Manual, and every state page is aligned with the official DMV handbook for that jurisdiction.

Start General Knowledge test → Pick your state
  • 520+real practice questions
  • 50states & DC covered
  • 8endorsement exams
Professional truck driver behind the wheel of a modern Class 8 semi-truck at golden hour

Choose your CDL endorsement exam

Eight federal knowledge tests cover every CDL endorsement on a U.S. Commercial Driver’s License. Take any test as many times as you like — no signup required, no paywall, all server-rendered HTML.

GK

General Knowledge

Required for every CDL applicant.

50 questions · 80% to pass

 AB

Air Brakes

Required to operate any vehicle with air brakes.

25 questions · 80% to pass

 CV

Combination Vehicles

Required for Class A combination drivers.

25 questions · 80% to pass

 H

Hazardous Materials (H)

Required to haul placarded hazardous loads.

30 questions · 80% to pass

 N

Tanker (N)

Required to haul liquid or gas in bulk tanks.

20 questions · 80% to pass

 T

Doubles / Triples (T)

Required to pull more than one trailer.

20 questions · 80% to pass

 P

Passenger (P)

Required to drive a vehicle designed for 16+ riders.

20 questions · 80% to pass

 S

School Bus (S)

Required to drive a school bus.

20 questions · 80% to pass

Or jump straight to your state

Each state page links the official DMV handbook plus a complete set of practice tests, deep study guides, and a step-by-step CDL requirements walkthrough framed for that jurisdiction’s exam.

Why use LicenseReady?

Earning a Commercial Driver’s License is a serious commitment. The federal knowledge exams cover hundreds of distinct rules — everything from air-brake pressure tolerances to hazmat placarding to school-bus crossing procedures. LicenseReady was built to give aspiring truck, bus, tanker, and school-bus drivers a clean, no-nonsense way to drill those rules until they stick.

Every question on LicenseReady is written against the U.S. Department of Transportation’s Federal Motor Carrier Safety Administration (FMCSA) CDL Manual, a federal government work in the public domain. We supplement the FMCSA source with state-specific notes from each state’s DMV CDL handbook so you see the same vocabulary you’ll meet on the official exam — and so you know whether the local agency is called the DMV, BMV, MVD, MVA, RMV, SOS, DOR, or DPS.

What is a CDL?

A Commercial Driver’s License is required to operate any vehicle in commerce that has a gross vehicle weight rating of 26,001 pounds or more, that is designed to carry 16 or more passengers including the driver, or that transports placarded amounts of hazardous materials. CDLs are issued by individual states under standards set by the FMCSA, which is why your written test will use national rules but be administered using your state’s specific handbook and procedures.

Class A, B, and C explained

Class A covers combinations with a gross combination weight rating of 26,001+ pounds where the towed unit is over 10,000 pounds (most tractor-trailers). Class B covers single vehicles 26,001+ pounds (large straight trucks and most buses). Class C covers smaller vehicles that still require a CDL because they carry 16+ passengers or placarded hazmat. All three classes start with the same General Knowledge exam.

How to study

Most candidates do best by reading their state’s CDL handbook from cover to cover at least once, then drilling practice questions until they consistently score above 90%. The questions on LicenseReady mirror the format used by state examiners: four answer choices, one correct, with a short explanation referencing the underlying CDL Manual concept so you understand why the answer is right.