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CDL Practice Test Free: CDL Test Prep

CDL Test Prep offers the most advanced test system to your device offering practice with over 360 up to-date questions. Don't take any chances at the DMV. With CDL Test Prep, you'll be prepared.

The application is divided into the following sections:

Mock test simulates the real test format. When you finish the test you will see your score and review all the questions.

Test your knowledge by practicing by topics.

You can download your state’s Driver's Manual to your device anytime! The manuals are official DMV publications.

The application saves the result of each question answered and a history of failures and successes to offer the most advanced system of all the statistics.

- Over 360 questions.
- Intelligent learning system: The questions are selected using an algorithm taking into account your latest scores and the questions that you need to practice more.
- Track and monitor your progress. Analyse your performance and find out when you have reached test standard.
- Modern and very easy to use interface.

Note: the DMV (Department of Motor Vehicles) is also known in various states as the BMV, DDS, DOL, DOT, DPS, DVS, HSMV, MVD, MVDL, MVS, OMV, and RMV.


Commercial Learner’s Permit [CLP] - CDL Practice Quiz

Getting on the road is more than just earning a Commercial Drivers License (CDL). Just as you have to get a learner’s permit before getting your regular driver's license, you need to earn a Commercial Learner’s Permit (CLP) before you can earn your CDL. You’ll also need to pass a general knowledge test. The sooner you are able to both pass the test and earn your CLP, the sooner you will be able to earn your CDL and be on the road earning money. 

To help you get on your way, we have made a few CDL practice tests that work a lot like DMV tests in content and format. These tests cover topics that are necessary to know, like general knowledge, air brakes, and combination vehicles.

The CDL and CLP practice tests we provide are completely free, and are available to you to use for review at any point. We want you to feel confident when you take the official DMV CLP and CDL permit tests, and if you use these quizzes you will be able to feel confident and comfortable when you are at the DMV. 

To get started, study your CDL Manual and then choose from any of our free CDL practice quizzes, listed below. 

Practice Quizzes

Practice quizzes are made to give you a sample of what to expect on the CLP test. Each quiz gives you a random selection of 15-20 questions from a larger pool of questions. This makes it so that every time you take a quiz, you’ll get a different set of questions. The larger question pool varies from quiz to quiz as well for even more diversity of questions for you to practice on.

There is no time limit for our practice quizzes, so take your time and do not rush. You can use the time to go back through your CDL Manual to find the correct answer and learn more in preparation for your test at the DMV.

Correct and incorrect answers are shown instantly. To review answers and learn more from the explanations provided for some of the questions, use the “back” button before reaching the end of the quiz. 

General Knowledge

Combination Vehicles

Air Brakes


CDL Practice Tests

Once you have practiced with the CDL Practice Quizzes above, it’s time for you to practice with something that’s a bit more like the real thing. The CDL practice tests are samples of the real tests that you will see at the DMV. Each test will provide you a random set of 25-50 questions from a large pool of questions. This will make it so that each time you take the test, you will be presented with a different group of questions in a different order. Correct and incorrect answers are shown instantly, but unlike the quizzes above, explanations are not offered.

General Knowledge

Combination Vehicles

Air Brakes



What is a CLP?

A CLP is a Commercial Learner’s Permit. It allows you to operate a commercial motor vehicle, while supervised by a valid CDL holder. It is valid for up to 180 days, but you are not permitted to take the driving skills test until at least 14 days after getting the CLP. 

How do I get my CDL learners permit?

To get your CDL learner’s permit, or the Commercial Learner’s Permit (CLP), you have to:

  1. Be at least 21 years of age (or 18-20 to drive intrastate).

  2. Submit your state’s CDL application and pay the appropriate fee.

  3. Provide identity and social security number verification (make sure to check your state’s requirements for this). 

  4. Provide proof of state and US residency.

  5. Submit a complete Medical Examination Report Form and Medical Examiner’s Certificate Form.

  6. Pass a vision test.

  7. Pass a knowledge exam.

Once you pass the knowledge exam, you will be issued your Commercial Learner’s Permit (CLP). 

Can you drive with a Commercial Learner's Permit (CLP)?

If you have a CLP you must drive with a CDL holder. 

How long is a CLP good for?

Your Commercial Learner’s Permit will be valid for up to 180 days. 

What are the 3 types of CDL license?

Class A

A Class A commercial driver’s license is required to operate any combination of vehicles with a gross combination weight of 26,001 or more pounds, provided the towed vehicle is heavier than 10,000 pounds. 
With a Class A CDL and proper endorsements, you may drive:

  • Tractor-trailers

  • Truck and trailer combinations

  • Tank vehicles

  • Livestock carriers

  • Flatbeds


Class B

A class B commercial driver’s license is required to operate a single vehicle with a gross combination weight rating of 26,001 or more pounds, or a tow vehicle not heavier than 10,000 pounds. 

With a Class B CDL and the appropriate endorsements you may drive:

  • Straight trucks

  • Large passenger buses

  • Segmented buses

  • Box trucks

  • Dump trucks with small trailers

  • Tractor-trailers


Class C

A class C commercial driver’s license is required to operate a vehicle that is designed to transport 16 or more occupants (including you, the driver) or transport hazardous materials, materials that are classified as hazardous under federal law. 

With a Class C CDL and the appropriate endorsements you may drive:

  • Small HazMat vehicles

  • Passenger vans

  • Combination vehicles not covered by Classes A or B


What are the 3 tests for CDL?

The three areas that you will be tested on for your CDL are general knowledge, combination vehicles, and air brakes. 

What is a CLP license?

A CLP license is a Commercial Learner’s Permit license. It allows you to drive and practice for your skills test, with a CDL holder with you. 

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10 Things You Should Do Before Your CDL Knowledge Exam

Many people get to the DMV overconfident and underprepared because they fail to do some of the simple things that would allow them to pass easily. What follows are the 10 steps that every aspiring commefcial driver should take to prepare for his or her official CDL or CLP knowledge exam.

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CDL Classes and Endorsements Overview (October 2021):

As you earn your Class A, Class B or Class C CDL, you can also earn endorsements. Endorsements allow you to drive certain vehicles or groups of vehicles such as single or combination trucks, tankers, doubles, school buses and passenger vehicles. The more endorsements you hold, the greater your chances to make more money and advance your career. You'll need to pass a separate knowledge exam and/or road exam for each endorsement you want to get. Learn more about CDL endorsements and restrictions.

Type of EndorsementCodeDescriptionRequired test(-s)
CDL General Knowledge Test-Even though technically it's not an endorsement, it's the first of several tests that you will have to complete in order to get your CDL. Includes questions on road signs, traffic laws, safe driving practices, vehicle equipment, and other important topics.Knowledge test
CDL Air Brake TestA (L Restriction Removal)If your CDL application requires an air brake endorsement, you will need to pass an air brakes test. This test will test your knowledge of air brakes and other vehicle components and systems.Knowledge test
CDL Combination TestXThis Combination endorsement covers both Tanker and Hazardous Materials.Knowledge test
CDL Doubles and Triples TestTIf you want to operate a vehicle with more than one trailer attached (doubles or triples), you will need to pass a doubles and triples test.Knowledge test
CDL HazMat TestHThis test covers all you need to know about driving vehicles that can carry hazardous materials, such as poisonous liquids or materials, explosives and radioactive materials.Knowledge test
CDL School Bus TestSThis endorsement allows you to transport students in a full-sized school bus.Prior to obtaining an S endorsement, a P endorsement must be earned.Knowledge test and road test
CDL Tank TestNThis endorsement allows you to aperte a tank vehicle (a vehicle that transports liquids or gasses in bulk.)Knowledge test
CDL Passenger TestPThe P endorsement is needed to operate a vehicle that seats 16 or more people, including the driver.Knowledge test and road test

Practice on the go and offline with our CDL Genie app:

CDL License
A commercial driver’s license (CDL) is a driver’s license that authorizes a person to operate a class of commercial motor vehicles (CMVs). Federal standards define three classes of CDLs, each for a corresponding group of motor vehicles:
  • Class A (Combination Vehicles): Any combination of vehicles with a gross combination weight rating (GCWR) of at least 26,001 pounds provided the gross vehicle weight rating (GVWR) of the vehicle(s) being towed exceeds 10,000 pounds. Examples include tractor-trailers.
  • Class B (Heavy Straight Vehicles): Any single vehicle with a GVWR of at least 26,001 pounds, or any such vehicle towing another vehicle whose GVWR does not exceed 10,000 pounds. Examples include coach buses and transit buses.
  • Class C (Small Vehicles): Any single vehicle or combination of vehicles not included in Class A or Class B that is used to transport sixteen or more passengers including the driver or to transport hazardous materials. (For this purpose, federal regulations define a hazardous material as a substance that has been designated by the US Secretary of Transportation as a material whose commercial transportation may pose an unreasonable risk to health and safety or property.) Examples include sixteen-passenger vans.
Some US states also require CDLs for other purposes or other types of vehicles. Like other types of driver’s licenses, CDLs are usually issued by a state government’s DMV. In other respects, a CDL functions like an ordinary driver’s license. It can be used as a valid form of identification. The holder of a CDL may legally drive a passenger car or obtain a motorcycle endorsement on the CDL.
Obtaining a CDL
  • You must be at least 18 years old.
  • Have a valid driver's license (or learner permit) for the state in which you are applying.
  • Pass the CDL written knowledge test.
  • Complete your medical exam and get your physical.
  • Get fingerprinted by law enforcement with ID verification, or go to an authorized third-party vendor that provides computerized fingerprinting services.
  • Go to a DMV office and pay the required fee to take the skills test

What Are All the Truck Parts Called?

CDL Test Questions and Answers: What To Expect?

  1. Study your state's CDL handbook. Sometimes it's hard to find the official source, so we've put together a list of the most recent official CDL handbooks for every U.S. state. If you prefer a hard copy, you should be able to pick one up at your local DMV office.
  2. Take a lot of practice tests. Taking practice tests that simulate your state's actual knowledge test will give you confidence and prepare you for the actual thing. Our CDL test questions are based on your state's official manual, so you'll know what to expect. These tests are valid for both commercial driver license and CDL permit (CLP).
  3. Watch CDL videos. YouTube is a fantastic resource, especially for pre-trip inspection.

Apply for a Commercial Driver's License (CDL)

A Commercial Driver's License is required to drive commercial vehicles such as tractor trailers, semi-trucks, dump trucks, and passenger buses (including school buses). The minimum age to apply for a CDL is typically 21. To become a truck driver, you can apply for a CDL at a local DMV office. Learn more about the three classes of CDLs that determine the kinds of commercial motor vehicles you’re permitted to drive: Class A, Class B, and Class C. There are strict federal guidelines for obtaining a CDL, and each state has its own requirements that need to be also met. You must pass both a written knowledge exam and a driving skills test, which are designed by your state.

CDL Written Knowledge Test

Your CDL test is the first step to a professional truck driving career in a trucking company. After you've studied your state's CDL handbook, the best thing you can do is either sign up for a costly CDL training program or take a free CDL practice test that simulates your state's actual knowledge test. provides a general knowledge test, as well as practice tests for specific commercial vehicle endorsements, such as air brakes test, school bus, and hazardous material (HazMat endorsement). There's also a practice test for pre-trip inspection - it will come in handy before your CDL road test. These tests are valid for both commercial driver license and CDL permit (CLP).

Choose your state from the drop-down menu above, and you’ll be provided with a test for all CDL license types that is closely based on your state’s manual, state and federal laws, and practice questions provided by the state if available.

How Is the CDL Practice Test Structured?

Think of this as your own CDL study guide for each endorsement. Every practice test has multiple-choice questions in the same format you’ll find on your state’s CDL test. These questions are phrased like the ones on your state’s official knowledge test. Most of the questions come with a hint to help you choose the right answer. Each correct answer comes with an explanation that has been carefully written to help you become more familiar with the topic of the question. We want you to be able to answer questions on those topics correctly even if they are worded a bit differently. Please read each explanation; it is based on your state’s CDL manual and DMV/DOT website.

Which Topics Are Covered?

This practice exam covers a wide range of topics that you’ll need to know about to pass your CDL knowledge test and enter the trucking industry. These topics include aggressive drivers, braking techniques, cargo safety, distracted drivers, drunk driving laws, emergency preparedness, road and weather conditions, and safe backing. No, we certainly did not forget about air brakes, combination vehicles, or hazardous materials! These topics are complex enough to deserve separate treatment. Just as states typically require you to pass specialized knowledge tests on those topics, we offer our own specialized practice tests on air brakes, combination vehicles, and hazardous materials. By studying our CDL practice tests, you'll be on your way to obtaining your Class A CDL, Class B CDL, or Class C CDL license. Remember that you'll also need to fill out the Medical History portion of the MER form (MCSA-5875) and also obtain a copy of the Medical Examiner Certificate form (MCSA-5876).

How Many Times Should I Take the CDL Practice Test?

We recommend that you keep taking the test until you become fully comfortable with the subject matter and receive a score high enough to boost your confidence about your upcoming CDL exam. A high score will bring you closer to passing your CDL knowledge test, so practice as many times as you’d like. There are no fees, and you won’t even have to register. Good luck now and on your CDL test. Drive safely!

Start preparing for your 2021 CDL test now, for free.

Select Your State


Pass your CDL Exam with our free CDL practice tests - updated for 2021!  We have assembled hundreds of sample questions and answers, all straight from the official sources. is your ultimate source of CDL practice tests. 

If you want to pass the CDL exam, try our free CDL practice tests and CDL study guides!

Summary: Try out our free CDL practice tests below.

Free CDL Practice Exams

CDL General Knowledge Practice Test

CDL Hazmat Practice Test

CDL Air Brakes Practice Test

CDL Doubles/Triples Practice Test

CDL Tanker Practice Test

CDL Combination Vehicles Practice Test

CDL Passenger Transport Practice Test

CDL School Bus Practice Test

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  • Instant Access – Immediate access... no waiting for a book to be shipped.
  • 1,000+ Practice Questions – With complete explanations.
  • All License Classes  – Covers all 3 license classes (A/B/C).
  • All Endorsements - Covers all 9 endorsements (HazMat, Tankers etc.).
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About Our Free CDL Practice Tests's sample CDL questions are a great way to prepare for your CDL permit test. Best yet, our tests require no registration or payment! 

All of our practice commercial driver’s license tests are categorized based on the actual test outline and are immediately scored at the end of the quiz. Once you are finished with the quiz, you will be presented with a score report which includes a complete explanation and rationale for every question answered incorrectly.  

We will be adding more sample CDL test questions in the near future, so please come back often. And if you like these practice questions and think they’d be valuable to others preparing for their CDL permit test, please make sure to share these resources with your friends and colleagues.

Other CDL Practice Tests and Resources

Along with our variety of commercial driver’s license practice tests listed above, we’re happy to share some additional resources for our visitors. Take a look at the options below:

All of the information you need to pass your CDL exam will be included in your state's CDL manual, so please make sure to study the latest version for your particular state. State CDL manuals will specify eligibility, requirements, and testing procedures.

The manual also acts as a CDL study guide because it covers all of the information that is required to pass your CDL exam. maintains a directory of State CDL manuals.  You can also find more information about CDL licensing procedures by visiting your state's license agency.

CDL Test Overview

If you plan on operating a Commercial Motor Vehicle (CMV) then you are required to obtain a Commercial Driver License (CDL). In order to get a CDL, you must first take and pass a general knowledge test, various endorsement tests (depending on the license type you are seeking) and a driving skills test.  

The tests that you will take depend on the license classification that you are obtaining (Class A, B, or C) and the type of vehicle that you will be driving (e.g., Tanker, Double/Triple, Passenger Bus). To help our visitors, provides an overview of how to get your CDL license.

CDL License Requirements

In general, the CDL test is based on national requirements, although each state may add additional restrictions. CDL license requirements focus on your driving record, age, and health.  For more information, you can visit our CDL license requirements page.

You must have a Commercial Driver's License (CDL) if you plan on operating:

  • Any single vehicle with a gross vehicle weight rating (GVWR) of 26,001 pounds or more.
  • Combination vehicles that have a gross combination weight rating (GCWR) of 26,001 or more pounds, if the GVWR of the trailer or towed unit is more than 10,000 pounds.
  • Vehicles designed to transport 16 or more passengers (including the driver).
  • Any vehicle which requires hazmat placards or is carrying material listed as a toxin or select agent in 42 CFR Part 73.

To determine the class of CDL license you need, please refer to the following diagram:

Class of CDL

Determining the Required Class of CDL

Note: A bus may be either Class A, B, or C depending on whether the GVWR is over 26,001 pounds or is a combination vehicle.

Which CDL Sections Should You Study?

Use the following tables to determine which tests you should study for:

Sections by License Type

Section Class AClass BClass C
 General KnowledgeXXX
 Passenger Transport   
 Air BrakesXXX
 Combination VehiclesX  

Sections by Endorsement

Section HazmatDouble/
Tank VehiclesPassengerSchool Bus
 General Knowledge XXXX
 Passenger Transport   X 
 Air Brakes X   
 Combination Vehicles XX  
 Doubles and Triples X   
 Tank Vehicles  X  
 Hazardous MaterialsX X  
 School Buses    X

CDL Knowledge Tests

You must take and pass one or more knowledge tests to earn your commercial driver's license. The tests you will take depend on the license class you are seeking (e.g., A, B, or C) and the endorsements that you need. These knowledge tests are summarized below:

  • General Knowledge – The general knowledge CDL test is taken by all applicants. The test has 50 multiple choice questions. Major topics of the general knowledge test include: CDL rules and requirements, safe driving, safe transportation of cargo, and pre-trip vehicle inspections.
  • Combination Vehicles – If you want to drive combination vehicles you must take and pass this CDL test section. The combination vehicles test has 20 multiple choice questions. The topics on the combination vehicles test include: driving combination vehicles safely, combination vehicle air brakes, antilock brake systems, coupling and uncoupling, and inspecting a combination vehicle.
  • Air Brakes – If you plan on driving a truck or bus with air brakes, or pull a trailer with air brakes, you will need to take the air brakes CDL test. The air brakes test will have 25 multiple choice questions. Topics on the air brake test include: parts of an air brake system, dual air brakes, inspecting air brake systems, and using air brakes.
  • Tank Endorsement – You are required to have a tank endorsement if you plan on driving a CMW over 26,000 pounds that is used to transport liquid/gaseous materials. The materials do not have to be hazardous. This endorsement is only required if the vehicle is a Class A or B vehicle with a permanently mounted take greater than 119 gallons or a portable greater than 1,000 gallons.
  • Double and Triple Trailer Endorsement – If you plan on pulling double or triple trailers, you are required to pass this endorsement test. There are 20 multiple choice questions that assess your knowledge about driving safely with double and triple trailers. This part of the CDL test includes questions on how to couple and uncouple trailers, pulling double/triple trailers, doubles/triples air brake checks, and inspections.
  • Hazardous Materials Endorsement – Hazardous materials (Hazmat) include explosives, flammable and combustible liquids and any materials that the shipper deems as hazardous. You must obtain a HAZMAT endorsement to operate any size vehicle that requires a HAZMAT placard (as further specified in 49 CFR 383.5). This endorsement test has 30 multiple choice questions covering the following topics: intent of the regulations, communication rules, loading and unloading, bulk packaging marking, driving and parking rules, and emergencies.
  • School Bus Endorsement – Although these regulations may vary from state to state, you are required to have a school bus endorsement if you plan on driving a vehicle that carries 16 or more people, including the driver, that is marked with or displays the words “school bus.” A school bus is used to transport students to or from school or authorized school activities. If the school bus is not transporting students, then a school bus manufacturer, dealer or mechanic is not required to have the endorsement. Before receiving a school bus endorsement, you must qualify for a passenger endorsement. This CDL test will cover the following topics: danger zones, use of mirrors, loading and unloading, emergency exit and evacuation, railroad-highway crossings, student management, antilock braking systems, and special safety considerations.
  • Passenger Endorsement – You will need to obtain a passenger endorsement if you plan on driving any vehicle designed to carry 16 or more persons, including the driver. If the vehicle is a school bus, you will need to obtain an additional school bus endorsement. The passenger transport endorsement CDL test will have 20 multiple choice questions on the following topics: vehicle inspection, loading and trip start, on the road, after-trip vehicle inspection, prohibited practices, and use of brake-door interlocks.


How can I pass my CDL Test?

One of the best ways to prepare for the CDL test is by taking free practice tests. At Test-Guide, we offer numerous free practice tests to help you succeed!

Which CDL sections should I study?

This mainly depends on which CDL license and endorsements you want/need. Depending on what you choose will alter what you need to study for. Check out the tables provided to see what areas you should be focusing on.

How do I get my CDL license?

There are a couple of important steps when trying to obtain your CDL license. You should determine which CDL license and endorsments you need first. Next you should obtain a commercial learner's permit. Finally, you should get your CDL License. For a complete run though of how to get your CDL, click here.

We Hope You Enjoy Our Free CDL Practice Exams

The sample CDL practice exam questions that we have included above will help you understand which areas you need to work on and let you find ways to improve. So be sure to study your state's CDL manual, take our free CDL practice tests, and review the areas that need a boost. Good Luck!

And If you have any other sources for free CDL practice tests, or CDL study guides, please let us know by contacting us and we can include them above.

Last Updated: 1/5/2021


Test study cdl

CDL Test

Good for ALL States

Our website is intended to help you to prepare to take the CDL Knowledge (written) Tests in as little time as possible. By using our practice tests, you will learn all of the major points in terms of CDL knowledge that you will have to know in order to get 80% or higher on your test.

In just a few hours, you will be able to take your CDL test, and receive a passing score.

We guarantee that you will pass your written test at the DMV your very first time!

 Our Practice Tests are applicable for ALL States.

Our Training Program contains about 500 questions which were created after deep analysis of all existing questions in all of the states. We provide for you only the questions that you need to know to pass the test. We have eliminated the unnecessary ones to save your time.

CDL Practice Tests

 Basic Tests


 Pre-Trip Inspections
1. Tractor-Trailer         PDF File (Printable)  $9.98SampleBuy it now
2. Straight Truck         PDF File (Printable)  $9.98SampleBuy it now
3. School Bus         PDF File (Printable)  $9.98SampleBuy it now

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CDLStudy offers flexibility and support you need to achieve your goals.
We understand the challenges faced by many students. You have a job, a family, a life and a very little time to study. Our online options are designed for flexibility, so you can schedule studying to fit your life.
As a CDL Study member, you can study CDL test from home, the office, or an Internet café - anywhere you can find a connection by using desktop or laptop computer, tablet pc or smart phone.
Our website lets you study CDL test while living your life.

To get a CDL license, you must pass a knowledge (written) test and a skills (road) test to ensure that you have the minimum knowledge and skill required to drive a commercial motor vehicle.

You will have to pass one or more knowledge tests, depending on the class of license and the endorsements that you need. Each test will be scored separately. The passing score is 80% for all commercial knowledge tests.

The written test can only be taken at the Department of Motor Vehicles.

CDL License Requirements

CDL Class A     (Tractor-Trailer)
  • General Knowledge
  • Air Brakes
  • Combination Vehicles
  • Hazardous Materials (to haul placarded hazardous material or waste)
  • Tank Vehicles (to haul liquids in a tank vehicle)
  • Double/Triple (to pull double or triple trailers)
CDL Class B     (Straight Truck, Bus & School Bus)
  • General Knowledge
  • Air Brakes
  • Transporting Passengers (to drive Bus or drive School Bus)
  • Transporting Passengers and School Bus (to drive School Bus)
  • Hazardous Materials (to haul placarded hazardous material or waste)
  • Tank Vehicles (to haul liquids in a tank vehicle)
CDL Class C    
  • General Knowledge
  • Transporting Passengers (to transport passengers)
  • Hazardous Materials (to haul placarded hazardous material or waste)

AAny combination of vehicles with a GCWR of 26,001 or more pounds provided the GVWR of the vehicle(s) being towed is in excess of 10,000 pounds. (Holders of a Class A License may, with appropriate endorsements, operate vehicles is any lesser class.
BAny single vehicle with a GVWR of 26,001 or more pounds, or any such vehicle towing a vehicle not in excess of 10,000 pounds GVWR. (Holders of a Class B License may, with appropriate endorsements, operate vehicles in any lesser class.
CVehicles transporting hazardous materials in placarded quantities in a vehicle having a GVWR of less than 26,000 pounds, and may pull a trailer having a GVWR of less than 10,000 pounds; or a vehicle designed to transport 16 or more passengers including the driver. (Holders of a Class C License may operate all vehicles within Class D.)


In addition to taking and passing the knowledge and skills tests required for a particular class of vehicle, all persons who operate the type of motor vehicles described below shall take and pass specialized tests to obtain each endorsement. The state shall issue endorsements only to drivers who successfully complete the tests.

TCombination Vehicles with double or triple trailers.Doubles/TriplesNO
NAny vehicle intended for hauling liquids in bulk.Tank VehicleNO
PAny vehicle designed to transport 16 or more passengers including driver.Passenger TransportYES
HAny vehicle used to transport hazardous materials.Hazardous MaterialsNO
XTank vehicles used to transport placarded amounts of hazardous materials.Tank and Hazardous MaterialsNO
SSchool bus.School BusYES
Z, Y & WMotorcycle endorsements. Ask for information at field office on requirements.Written Knowledge TestYES


The following are some of the restrictions which may be attached to a Commercial Driver’s License:

BCorrective lenses must be worn while driving.
KDriver limited to driving a commercial vehicle in intrastate commerce only.
LDriver limited to driving commercial vehicles which do not have air brakes. (This restriction removed by passing Air Brake Knowledge Test and full Skills Test)
ELimited to CMV with automatic transmissions. (This restriction removed by passing a full Skills Test)
S Limited to government plated vehicles.
T Limited to buses only.
O Not tractor-trailer (This restriction removed by passing full Skills Test
in a tractor trailer)
Y Yearly Renewal.
M Except Class A Bus.
N Execpt Class A & B.


The Best Way To Study For Your CDL Permit - Driving Academy

CDL Practice Test

As you prepare to take your Commercial Driver’s License (CDL) exam, we’ve put together some information here that will help you prepare and know what to expect. You’ll find details on how to sign up for the test, along with costs and payment information. Also, we’ll give you an overview of what you can expect to see on the test, and more.

CDL Practice Test


Exam Purpose and Background

When you take and pass the exam, the CDL you earn will allow you to drive larger commercial vehicles and those that require a specialized or advanced set of skills and knowledge. For example, a CDL allows you to operate a vehicle weighing 26,001 pounds or more, based on gross vehicle weight rating (GVWR), or lighter vehicles transporting people. In general, the CDL signifies that you have the baseline knowledge needed to operate these specialized vehicles safely.

Requirements to Apply

To qualify for a CDL, you must meet a number of requirements to confirm that you’re a U.S. citizen and disclose any other pertinent driving-related information. Find a complete set of requirements at

The Steps to Obtaining Your CDL

When you’re ready to begin the steps to obtain your CDL, contact your local Department of Motor Vehicles for an appointment.

Here’s an overiew:

  • Be 18 (driving intrastate) or 21 (driving interstate)
  • Turn in your state’s CDL application form and fee
  • Confirm identity and Social Security Number verification
  • Provide proof of residency
  • Submit a complete Medical Examiination Report Form and Medical Examiner’s Certificate Form
  • Complete/pass vision test
  • Pass your Knowledge Test to receive a Commercial Learner’s Permit (CLP)
  • After 14 days, schedule your Skills Test
  • Pass the pre-trip inspection
  • Pass the road skills and driving examination using your own vehicle
  • Pay needed fees for your CDL

Costs/Payment Options

There’s a wide range of fees involved with taking the CDL exam, based on the license class you’re seeking, along with the type of application (including special enorsements, with/without driving test, etc.). In general, the fee ranges from $27 to $73 and is subject to legislative change. Find updated fees at

CDL Testing Information

Two Parts: Getting your CDL involves two primary steps, including a Knowledge Test and a Skills Test.

The Knowledge Test

Based on what class of license you’re pursuing and the endorsements you’re required to have, you will need to take at least one knowledge test. The general knowledge test is required no matter what license class you’re applying for. See for a list of knowledge tests and a decision tree to help you plan for which tests you’ll need.

Studying for Your Test

There are two primary resources you should study as your prepare for your CDL exam. The first is the general CDL Manual ( that give you a broad, standardized set of information.

Second, be sure to study your state-specific CDL Manual ( to ensure you understand specific information and requirements for your jurisdiction.

What to Bring:

  • Current forms of ID (current driver’s license, proof of U.S. citizenship/lawful permanent residency (such as U.S. passport, U.S. birth certificate, certificate of citizenship or permanent residency card)

What Not to Bring:

  • Any type of study aids, such as notes or written materials
  • Electronic devices of any kind, including cell phones, iPads, etc.
  • Personal items

Test Duration:

If you’ll be taking all knowledge tests, you can plan on taking two to three hours.

The Skills Test

Once you pass the Knowledge Test, you’re eligible to take the Skills Test. This portion of the test covers three areas, including basic control skills, vehicle inspection and a road test.

  • Vehicle Inspection Test (Takes about 40 Minutes)—During this portion, you’ll walk through an actual inspection with your proctor and explain your inspection decisions to him/her.
  • Basic Control Skills Test (Takes about 30 Minutes) — This portion puts you behind the wheel and requires to you complete some essential maneuvers, including turning the vehicle in a defined area, pulling backward and forward, etc.
  • Road Test (Takes about 45 to 60 Minutes) — Using route designed by the Department of Motor Vehicles, you’ll drive the vehicle and be assessed on your ability to navigate and successfully complete maneuvers typically required of a person driving the vehicle.

Additional Resources

As you get set for the CDL exam, we want to remind you about other resources that are available to you with Mometrix Academy. For a fee, you’ll have access to our CDL exam Study Guide that features valuable information and video learning. Also, you can use our CDL Flashcard Study System that will help you test your information recall and boost test readiness.


What is on the CDL test?

On the CDL test, you will be tested over several topics, including: vehicle inspection, communicating with other drivers, the dangers of driving while drinking, rail road crossing, accident procedures, and the importance of staying alert and fit to drive.

How many questions are on the CDL test?

The CDL test contains 50 multiple-choice questions.

What percentage do you need to pass a CDL test?

To be considered as passing the CDL test, you will need to answer 80% of the questions correctly.

What does a CDL allow you to do?

A CDL allows you to drive and operate vehicles that are included in a particular class for which the license was issued. For example, depending on which class of CDL you will have, you will be able to driver any vehicle that weights 26,000 or more for commercial use, transport hazardous waste material, and operate a vehicle that is designed to transport more than 16 passengers.

Can you drive a bus with a CLASS A CDL?

To drive a bus, you must possess a Class C CDL along with first a P endorsement. A P endorsement is required to drive a vehicle that carries at least 16 passengers. After obtaining the P endorsement, you are then qualified to obtain an S endorsement.

Is the CDL A test multiple choice?

Yes. The CDL test is multiple choice. You will have 60 minutes to answer 50 multiple-choice questions.

How long does it take to get your Class A license?

If you prefer to take a CDL training program, it usually takes about seven weeks to obtain your Class A CDL.

What is a Class A CDL permit?

A CDL permit is the first step to obtaining your CDL. A CDL permit is a lot like a regular driver’s license. You are required to have it before obtaining your actual CDL.

What is required for a CLASS B CDL?

There are several requirements for obtaining a Class B CDL. You must first be 21 years of age and be able to pass an eye exam. You must also have a valid driver’s license free of any moving violations. You will be required to pass the General Knowledge test, the Basic skills test, Air-brakes test, Pre-trip inspection and any other required tests needed to obtain a Class B CDL.

CDL Study Guide

Mometrix Academy is a completely free resource provided by Mometrix Test Preparation. If you find benefit from our efforts here, check out our premium quality CDL study guide to take your studying to the next level. Just click the CDL study guide link below. Your purchase also helps us make even more great, free content for test-takers.

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