alabama
CDL Practice Test

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The practice tests below offer CDL practice test questions in all the different topic areas you’ll see on the Alabama CDL test. The CDL tests are free and can be taken as often as you’d like to help you in your preparation for earning an Alabama commercial driver's license. You will be presented with 40 questions and you must answer 34 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 start your Alabama CDL practice test.

1 / 40

Class A explosives must not be transported in a combination vehicle if the vehicle includes:

2 / 40

The _____of the kingpin has the locking jaw close around it.

3 / 40

How do you check the air compressor governor "cut in" and "cut out" pressures?

4 / 40

This item should be firmly attached the to frame, be solid, and clear of objects:

5 / 40

What can side to side surge cause?

6 / 40

The best way to describe a dual air brake system is:

7 / 40

How do you test the trailer service brakes?

8 / 40

This object is required to be checked for damage, that it's secure, and strong enough to handle any cargo.

9 / 40

Which of the following types of cargo must never be carried on a bus with passengers?

10 / 40

Select the true statement about empty trucks:

11 / 40

If there is no traffic light or attendant, how far from the draw of a drawbridge must you stop?

12 / 40

What is the purpose of the supply pressure gauge?

13 / 40

If your bus is equipped with an emergency exit door, it must:

14 / 40

Which of the following statements is true about speed management?

15 / 40

What is the next step after securing the bus when you have an unruly child on board?

16 / 40

What is the best way to see the sides and rear of your vehicle?

17 / 40

In what position should shut off valves on the rear of the last trailer be in on a set of double trailers?

18 / 40

How do you determine if slack adjusters need to be adjusted?

19 / 40

Which of the following is not a prohibited practice on the bus:

20 / 40

You should____to check the free play of manual slack adjusters on S-Cam brakes.

21 / 40

Select the true statement in regards to the braking power of spring brakes.

22 / 40

Buses may carry small-arms ammunition labeled ORM-D, emergency hospital supplies, and drugs. However, buses must never carry:

23 / 40

What is the stopping distance for a tractor trailer that is traveling at 55 mph on dry pavement?

24 / 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:

25 / 40

When accelerating:

26 / 40

If there is rust around the nuts, what may it indicate?

27 / 40

You should_____when the low pressure warning is activated:

28 / 40

When would you lock some emergency roof hatches in a partly open position?

29 / 40

You should back up slowly until____when coupling the trailer.

30 / 40

The CDL manual indicates the last step on picking up students at the bus stop is as follows:

31 / 40

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

32 / 40

Which trailer should be the first one after the tractor?

33 / 40

Do converter dollies have spring brakes?

34 / 40

The emergency air line is _____and the service air line is____.

35 / 40

When is it acceptable for non-hazardous materials to be described by hazard class words or identification numbers?

36 / 40

A tank trailer should never be fully loaded due to:

37 / 40

The best way to test the low air pressure warning signal is to:

38 / 40

Select the statement that is true in regards to quick steering movements and triple/double trailers:

39 / 40

The Emergency Response Guide, ERG, can best be explained as _____.

40 / 40

The pintle hook should be_____ and the converter dolly air tank drain valve is___when doing a walk around inspection of a triple or double trailer.

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CDL Category Practice Tests

How To Get an alabama Commercial Drivers License

Applicants must be of the legal age of 18 or older. Those between the ages of 18 and 21 are only permitted to drive a commercial vehicle within the state of Alabama. Those age 21 and older may drive a commercial vehicle across state borders. Only those aged 21 and older may apply for their hazardous materials endorsement. All applicants must possess a DOT Medical Card.

An applicant’s driving record will be considered when applying for a CDL license. There are specific items in which a driver will be disqualified for a commercial driver’s license. These include:

  • Any suspension/revocation 36 months before submitting an application.
  • Any six-point violation or conviction of operating a motor vehicle impaired 24 months prior to submitting an application.
  • Any current denial, cancellation, suspension, or revocation of driver’s license.
  • Possessing multiple driver’s licenses from various States.
  • Not meeting certifications on BFS-103 CDL Certification Form.

Alabama requires all CDL applicants to complete both a knowledge test and a skills test. Alabama offers the following CDL license endorsements:

  • S – School Bus
  • T – Double Trailer
  • P – Passenger
  • N – Tank Vehicles
  • H – Hazardous Materials

Hit the Open Road

alabama CDL License Test Tips

The knowledge tests are presented in written form for Class A, B, and C applicants. All classes are required to take a 50 question assessment. Those applying for a Class A CDL will need to complete an additional 20 questions about combination vehicles. Applicants seeking to drive vehicles with air brakes must complete a 25 question air brake assessment. Those seeking any endorsement other than hazardous materials must complete a 20 question assessment that is endorsement specific. Those applying for the hazardous materials endorsement must complete a 30 question knowledge test. All applicants must receive a score of 80 percent or higher on each test to pass.

A skills test is required for all CDL applicants regardless of Class. The School Bus and Passenger Endorsements require a skills test as well. All applicants applying for Air Brakes Certification must use a vehicle that is equipped with air brakes for their skills test. The CDL skills test consists of a vehicle inspection test, basic control skills test, and a driving test. All three test sections must be passed for CDL approval. Failure in any skills test area automatically fails the applicant.

Additional Information

CDL Testing by the Alabama Law Enforcement Agency

The Alabama Law Enforcement Agency administers the certifying and testing of commercial drivers in the state. To get more information contact them via: Website:  https://www.alea.gov/dps/driver-license
Phone:  334.242.4400
Email:  [email protected]

Additional Alabama CDL Helpful Links

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