Study with free CDL Practice tests.

Our CDL practice test app prepares you to combat any vehicle class (Class A, B or C). All CDL practice tests are absolutely FREE. Start your preparation today.

The best Android & Ios CDL Prep mobile app.

We've created our app with appropriate questions that are nearly identical to the CDL exam. Our CDL practise tests will fully prepare you for the real exam.

Easy and Friendly CDL Prep App

Our CDL Prep app is simple to use,covers every significant category to help you prepare for your CDL test. Download the app today and start practicing.

CDL study test

How "CDL PREP App" helps you?

CDL PREP App is a mobile application (app) that helps you to prepare for the Commercial Driver's License (CDL) exam. We are an entirely free CDL preparation app. We are equipped with CDL practise tests 2021 that are nearly equivalent to the real CDL exam. We also provide practice tests for all of the major vehicle classes (A, B, and C) as well as their many endorsements. We also have a CDL prep test feature on our CDL Prep app, which allows you to solve problems in a set amount of time. It adequately prepares you for the real CDL test.

We all know that the CDL exam is hard to pass and demands a lot of practice. That's why, We offer numerous questions that will help you pass your Commercial Driver's License test the first time. CDL Prep App is simple to use and easy to access. We also have a news section to keep you updated with the trucking industry.

CDL test

Why choose "CDL PREP App" for your CDL preparation?

CDL preparation test app for Android CDL preparation test app for iOS

"The secret to success is preparation. And the future belongs to those who act now, start planning today."

Start studying for your Commercial Driver's License test with CDL PREP APP, the path to your bright future and a successful career. Download the app now and begin your free CDL prep today.

What is CDL? Why do you require it?

A Commercial Driver's License (CDL) is required to operate commercial vehicles. Any driver operating commercial driving equipment or other sorts of heavy machinery will need this licence. A higher level of expertise and understanding is required to operate a commercial motor vehicle. To be authorised to drive any form of motor vehicle on public roads, most drivers must receive a commercial driver's licence (CDL) from their home state. Applicants must pass both skills and knowledge tests in order to pass the Commercial Driver's License test. The CDL permit test requirement is generally based on national laws, however each state may impose additional limits. The applicant's age, driving record, physical and mental health are all important considerations.

Free CDL test App

Different types of CDL Practice Test

The federal government divides Commercial Driver's License into three categories, each of which is associated with a specific type of vehicle:

Class A (Combination Vehicles):

The vehicle's gross combination weight must be at least 26,001 pounds or more, and the weight being towed must be greater than 10.000 pounds.

Class B (Heavy Straight Vehicles):

Any single vehicle weighing at least 26,001 pounds, or any similar vehicle towing other than a vehicle with a GVWR (gross vehicle weight rating) of less than 26,001 pounds.

Class C (Small Vehicles):

Any single or combination vehicles that are not included in class A or B are classified as Class C (small vehicles).

Written knowledge for CDL test

You must take and pass one or more written examinations to obtain your CDL licence, depending on the CDL class you want and the endorsements you need.

General knowledge

The CDL general knowledge test, which is required of all applicants, consists of 50 multiple-choice questions about rules and regulations, safe driving, safe cargo delivery, and pre-trip inspection.

Combination vehicles

The 20 questions on the combination vehicles CDL test cover topics such as safe driving, air brakes, antilock brake systems, coupling and uncoupling, and checking a combination vehicle.

Air brakes

You'll need to take the air brake CDL test if you want to drive a truck, bus, or pull a trailer using air brakes. There are 25 multiple-choice questions on parts of an air brake system, dual air brakes, inspecting air brake systems, and using air brakes in this test.


You must pass the tanker endorsement if you plan to operate a vehicle that weighs more than 26000 pounds and is utilised to transport liquids or gases (that aren't dangerous). Furthermore, this endorsement is only required if the vehicle is a class A or B with a permanent capacity of more than 119 gallons or a portable with a capacity of more than 1000 gallons.


You must pass the double/triple endorsement CDL test if you are towing a double or triple trailer. There are a total of 20 multiple-choice questions that will test your knowledge of double and triple trailer driving safety.


Explosives, flammable and combustible liquids, and any other products that the shipper considers harmful are all considered hazardous materials. 30 multiple-choice questions about regulations, communication rules, loading or unloading, bulk packing marking, driving and parking, and emergencies are asked in the Hazmat CDL test.

School Bus

A school bus CDL test is required to carry students to and from school or school-sponsored activities. School bus endorsement is not required if the school bus does not transport pupils. Note that you must first earn passenger endorsement before applying for school bus endorsement.

We cover all the major CDL Vehicle categories.

We have CDL practice tests with a large number of questions for every major category.

CDL General knowledge Test
General knowledge
CDL Combination vehicles Test
Combination vehicles
CDL Air brakes Test
Air brakes
CDL Tanks Test
CDL Doubles/Triples Test
CDL Hazmat Test
CDL School Bus Test
School Bus

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How does "CDL PREP App" work?