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CDL Practice Tests

CDL Practice Tests

Commercial Driver's License practice for every state and endorsement.

Source: FMCSA Commercial Driver's License Manual (public domain) plus state-specific supplements.
Exam Guide

CDL Test Guide: Knowledge Exams, Endorsements, and How to Prepare

New to this exam? Read our guide on the format, scoring, what's tested, and how to prepare →

Practice tests

50 questions per test

General Knowledge

Practice mode with explanations, or full mock exam — 50 questions, 80% to pass.

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 25 questions per test

Air Brakes

Practice mode with explanations, or full mock exam — 25 questions, 80% to pass.

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 20 questions per test

Combination Vehicles

Practice mode with explanations, or full mock exam — 20 questions, 80% to pass.

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 30 questions per test

Hazardous Materials

Practice mode with explanations, or full mock exam — 30 questions, 80% to pass.

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 20 questions per test

Tanker

Practice mode with explanations, or full mock exam — 20 questions, 80% to pass.

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 20 questions per test

Doubles and Triples

Practice mode with explanations, or full mock exam — 20 questions, 80% to pass.

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 20 questions per test

Passenger Transport

Practice mode with explanations, or full mock exam — 20 questions, 80% to pass.

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 20 questions per test

School Bus

Practice mode with explanations, or full mock exam — 20 questions, 80% to pass.

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Practice by state

Each state DMV uses slightly different rules and procedures. Practice with state-specific notes by selecting your state below.

Alabama Alaska Arizona Arkansas California Colorado Connecticut Delaware Florida Georgia Hawaii Idaho Illinois Indiana Iowa Kansas Kentucky Louisiana Maine Maryland Massachusetts Michigan Minnesota Mississippi Missouri Montana Nebraska Nevada New Hampshire New Jersey New Mexico New York North Carolina North Dakota Ohio Oklahoma Oregon Pennsylvania Rhode Island South Carolina South Dakota Tennessee Texas Utah Vermont Virginia Washington West Virginia Wisconsin Wyoming District of Columbia

About the CDL exam

Practice tests for the Commercial Driver's License written exam. Questions reflect the Federal Motor Carrier Safety Administration (FMCSA) Commercial Driver's License Manual that all states adopt as the basis for their CDL exams.

Editorial Source

How we built these practice tests

Every question in our CDL bank was written by the 247SimpleTests Editorial Team using the current version of FMCSA Commercial Driver's License Manual (public domain) plus state-specific supplements.. We do not scrape questions from other test-prep sites; we write originals that test the same knowledge in different language. Each question lists the source section it was drawn from. Full methodology →

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Study guide

CDL Study Guide 2025–2026 (Trivium)

Complete prep for all CDL written tests: general knowledge, air brakes, combination vehicles, hazmat, and all endorsements. Includes full-length practice tests.

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CDL Practice Tests & Flashcards (Accepted Inc.)

600+ practice questions covering every FMCSA knowledge area, plus 400 flashcards for endorsement prep.

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Master the CDL Truck Driver's License (Arco)

Arco's classic CDL prep with in-depth FMCSA manual coverage, endorsement chapters, and scored practice exams.

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