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General Knowledge
Air Brakes
Combination Vehicles
Transport. Passengers
Hazardous Materials
Tank Vehicles
School Bus
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CDL Test

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
1. General Knowledge 240 questions   $17.98 Sample Buy Now
2. Air Brakes  70 questions   $11.98 Sample Buy Now
3. Combination Vehicles  70 questions   $11.98 Sample Buy Now

1. Transporting Passengers 50 questions   $9.98 Sample Buy Now
2. Hazardous Materials 50 questions $15.98 Sample Buy Now
3. Tank Vehicles 30 questions   $9.98 Sample Buy Now
4. Double/Triple 35 questions   $9.98 Sample Buy Now
5. School Bus 60 questions $11.98 Sample Buy Now

 Pre-Trip Inspections
1. Tractor-Trailer         PDF File (Printable)   $9.98 Sample Buy Now
2. Straight Truck         PDF File (Printable)   $9.98 Sample Buy Now
3. School Bus         PDF File (Printable)   $9.98 Sample Buy Now

 Get 3 for 1 Price:

Each Practice Test includes:
1. An Online Test   (You can access it from any computer connected to the Internet)
2. A Downloadable Test   (You can study offline on your computer)
3. A CDL Manual - in PDF format   (printable).

Order Test

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.

CDL License

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)

A Any 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.
B Any 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.
C Vehicles 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.

T Combination Vehicles with double or triple trailers. Doubles/Triples NO
N Any vehicle intended for hauling liquids in bulk. Tank Vehicle NO
P Any vehicle designed to transport 16 or more passengers including driver. Passenger Transport YES
H Any vehicle used to transport hazardous materials. Hazardous Materials NO
X Tank vehicles used to transport placarded amounts of hazardous materials. Tank and Hazardous Materials NO
S School bus. School Bus YES
Z, Y & W Motorcycle endorsements. Ask for information at field office on requirements. Written Knowledge Test YES


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

B Corrective lenses must be worn while driving.
K Driver limited to driving a commercial vehicle in intrastate commerce only.
L Driver limited to driving commercial vehicles which do not have air brakes. (This restriction removed by passing Air Brake Knowledge Test and full Skills Test)
E Limited 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.