CDL Practice Test


This site contains free CDL practice tests for Arizona. You can take these practice tests as many times as you would like as you prepare for the Arizona CDL test. Questions are derived from various CDL topics that are represented in the Arizona CDL manual. You will be presented with 40 questions and you must answer 34 test questions correctly to pass. There is a 50-minute time limit. You may not go back once you answer a question. Click the “Start Test” button below to begin your Arizona CDL practice test.

1 / 40

A truck with baffles will handle:

2 / 40

____is the most common type of foundation brakes used by heavy vehicles.

3 / 40

The baffles in a tank trailer help to control:

4 / 40

Why should you test the tractor protection valve?

5 / 40

What is the best way to stop all skids?

6 / 40

On a drawbridge, you do not need to stop, but must slow down and make sure it's safe, when:

7 / 40

When checking for_____you are looking for dripping fluids or puddles on the ground below the transmission or engine.

8 / 40

What is a common cause of tire fires?

9 / 40

When does your vehicle's single brake system need an adjustment?

10 / 40

When approaching railroad tracks, stop your bus:

11 / 40

What are you checking when looking at the lubrication level on a dipstick?

12 / 40

Should the air pressure in the service air tanks fall below____the driver must be alerted via warning mechanism in the truck cab.

13 / 40

When transporting hazardous loads, you must check the tires at least:

14 / 40

Select the reason as to why air tanks need to be drained:

15 / 40

Which seats not securely fastened to the bus are usually allowed?

16 / 40

What handling effect will baffles have?

17 / 40

When driving in very hot temperatures, you should:

18 / 40

Buses are prohibited from carrying all of the following hazardous materials except:

19 / 40

Select the true statement about empty trucks:

20 / 40

When approaching a school bus stop, you should:

21 / 40

What are spring brakes?

22 / 40

What is a supply pressure gauge used for?

23 / 40

Select the true statement about seeing ahead.

24 / 40

Which of the following statements about downshifting is NOT true?

25 / 40

Suspension systems:

26 / 40

What is the benefit of ABS?

27 / 40

It has just reached freezing. Which of the following areas is slippery?

28 / 40

With Division 1.1, 1.2, or 1.3 Class A or B, how close can you park to a bridge, tunnel, or building?

29 / 40

The direction of liquid movement not prevented by baffles is:

30 / 40

Drivers who transport route controlled radioactive materials must carry a dated certificate of radioactive materials training. This training must have ocurred within the last:

31 / 40

To find out if a shipment includes a hazardous material, you should:

32 / 40

If you are traveling at 55 mph in a 30-foot vehicle, you should leave how many seconds of following distance?

33 / 40

For any flatbed load you must have at least ____ tie downs.

34 / 40

Make sure that_____before you back under a trailer.

35 / 40

What handling effect should you expect when your tank has baffles?

36 / 40

Which of the following statements about loading and unloading cargo tanks is false?

37 / 40

Drivers placard their vehicle to _____ the risk.

38 / 40

Before backing under the trailer you should______when coupling a tractor and trailer with air lines already connected.

39 / 40

Under which two special conditions should you downshift?

40 / 40

The cause of almost half of all truck driver deaths are:

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CDL Category Practice Tests

CDL Practice Test

How To Get An arizona Commercial Drivers License

All Arizona CDL applicants must possess a valid driver’s license and meet the many eligibility requirements listed here. Arizona residents who are 21 years or older may apply for a commercial driver’s license and any specific endorsements offered. Those residents who are between the ages of 18 and 21 can apply for a restricted commercial driver’s license that only offers intrastate driving and limited endorsement availability. All applicants must possess a medical card from a qualified DOT Medical Examiner.

Any applicants that have the following attributes will be disqualified from receiving a CDL:

  • Being convicted in the past two years of driving a commercial vehicle under the influence.
  • Having more than one driver’s license.
  • Having commercial driving privileges revoked in Arizona or any other U.S. State.
  • Having a suspended or revoked driver’s license.

Those applying for their Arizona-issued commercial driver’s license will be required to take two assessments. These include the knowledge test and the skills test. Depending on the Class and Endorsements that an applicant is seeking, they may be required to partake in more than one knowledge test.


S – School Bus
P – Passengers
T – Doubles and Triples
N – Tanks
H – Hazardous Materials
X – Tanks with Hazmat

Hit the Open Road

arizona CDL License Test Tips

All knowledge tests require a passing score of 80 percent or higher for the applicant to receive their Arizona Commercial Driving Permit. The general knowledge test is comprised of 50 questions regarding commercial vehicles and driving them. Class A drivers will be required to not only complete the general knowledge test, but also a 20 question assessment about combination vehicles. Those seeking endorsements will be required to take a test for each endorsement sought. Hazmat Endorsement requires a 30 question assessment. School Bus Endorsement and the Air Brake Restriction Removal requires a 25 question assessment.

In order to assess an applicant’s ability to operate a commercial vehicle, Arizona testing facilities will require skills tests. These skills tests are comprised of a pre-trip vehicle inspection, on-road driving test, and evaluation of basic control skills. Any applicant that is seeking an endorsement must take the skills test in the type of vehicle the endorsement is intended for.

Additional Information

Information on the Arizona Department of Motor Vehicles

The Arizona DMV regulates the certifying and testing of commercial drivers in the state. To get more information contact them via:


Phone:  602.255.0072


Additional Arizona CDL Helpful Links

Please use the links below to access more valuable Arizona CDL testing resources and to learn more about practice driving test resources for the state of Arizona.