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

What is the first thing to do if your vehicle catches fire while driving?

2 / 40

The trailer height is correct for connecting a converter dolly to a second trailer when:

3 / 40

Puddles or dripping fluids from the underside of the transmission and engine may indicate:

4 / 40

Bus drivers must have a CDL if they drive a vehicle:

5 / 40

Double and triple trailers should be driven with care to avoid a rollover or jacknife.

6 / 40

The golden rule for school buses when approaching and crossing railroad tracks is:

7 / 40

To transport cargo safely, which of these are you NOT responsible for?

8 / 40

In the event of an accident you should remember to do the following EXCEPT:

9 / 40

Your bus starts to lean toward the outside on a banked curve, you are:

10 / 40

Cargo tanks are:

11 / 40

Select the statement that is true in regards to managing space to the sides.

12 / 40

What is the best way to figure out how many seconds of following distance you have?

13 / 40

Why is it dangerous to unlock the pintle hook with the dolly still under the rear trailer?

14 / 40

To inspect the______you should pump the pedal 3 times and hold it down for 5 seconds while making sure the pedal doesn't move during those 5 seconds.

15 / 40

The gauge that indicates normal or increasing lubrication pressure to prevent engine seizure, failure or breakdown is:

16 / 40

Within 3 minutes, this gauge pressure should build to 90 psi from 50 psi.

17 / 40

Select the two reasons as to why special care is needed when driving a tank vehicle:

18 / 40

Select what you should not do when coupling the glad hands.

19 / 40

How should you inspect a converter dolly?

20 / 40

A shipper’s certification is best described as _____.

21 / 40

This gauge has a governor cut-off.

22 / 40

This carries hydraulic fluid or air to the wheel brake assemby.

23 / 40

The minimum tread depth for tires other than the front tires is ____.

24 / 40

How do you release the dolly brakes when coupling twin trailers?

25 / 40

Select the load of the trailer that will require the shorter distance to stop.

26 / 40

When you have a major leak in the service line and you apply pressure to the brakes, the service air pressure will escape and:

27 / 40

What does the drain valve for air tanks remove?

28 / 40

Two causes of tire fires are ______.

29 / 40

Spring brakes are usually held back by_____during normal driving.

30 / 40

What should the driver pay special attention to when driving smaller tanks?

31 / 40

A placarded vehicle must have at least ___ placards?

32 / 40

The system that needs to be checked for signs of leaks with rust or carbon soot and damage is the _____.

33 / 40

This gauge will indicate if the generator or alternator is charging:

34 / 40

A commercial motor vehicle (CMV) is defined as:

35 / 40

What are the 3 methods for securing a second trailer before coupling?

36 / 40

Your vehicle is going down a long hill and your brakes begin to fail. What should you do?

37 / 40

You should turn off your engine when loading flammable liquid unless:

38 / 40

Air pressure loss in a vehicle with a fully charged air system should be less than_______after the initial drop and brake applied.

39 / 40

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

40 / 40

How do you test the trailer service brakes?

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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.