CDL Practice Test


Welcome to the Maryland CDL practice test site. Questions on these practice tests are similar to those that are found on the Maryland CDL test and presented by the MVA. Use these practice test questions as you prepare to obtain a Maryland CDL. These tests are free and you may take them as many times as you would like. 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 begin. 

1 / 40

What is a supply pressure gauge used for?

2 / 40

The act of operating a motor vehicle in a selfish, bold, or pushy manner, without regard for the rights or safety of others is known as.

3 / 40

What color and shape is the trailer air supply control?

4 / 40

Two causes of tire fires are ______.

5 / 40

If students must cross the street, when they get off the bus, which statement is true?

6 / 40

If you are transporting cargo, you should inspect the cargo and securing devices:

7 / 40

When checking the wheelchair lift, the things you should look for are:

8 / 40

Why are you required to take an exam about air brakes?

9 / 40

What placards, if any, do you need if your load includes 20 pounds of Division 2.3 gas and 1,001 pounds of flammable gas?

10 / 40

Do converter dollies have spring brakes?

11 / 40

What do you need to do to supply air to the air tanks of the second trailer?

12 / 40

What does the air compressor governor control?

13 / 40

Unless you_____you will feel the effects of a liquid surge.

14 / 40

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

15 / 40

In Column 1 the symbol "I" means:

16 / 40

With Division 1.2 or 1.3 Explosive B, how close to the travelled part of the roadway can you park?

17 / 40

What is always required before loading, driving, or unloading a tanker?

18 / 40

What are the three hazard classes should NOT be loaded into a trailer that has a heater air conditioner unit?

19 / 40

Which of the following statements about special danger of loading and unloading is true?

20 / 40

Why do air brakes take longer to stop than hydraulic brakes?

21 / 40

When should the trailer hand valve be used?

22 / 40

The floor liner for explosives may not:

23 / 40

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

24 / 40

What is incorrect concerning disruptive passengers?

25 / 40

Select the true statement about double or triple trailers.

26 / 40

When arriving at the destination announce:

27 / 40

Cargo tanks ____.

28 / 40

When approaching railroad tracks, stop your bus:

29 / 40

What is the minimum amount of distance you should maintain when driving at 50 mph in ideal conditions with a 100 ft twin trailer combination?

30 / 40

A hazard class that uses transport indexes to determine the amount that can be loaded in a single vehicle is _____.

31 / 40

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

32 / 40

When should you avoid using the parking brake?

33 / 40

Select the true statement in regards to if a glad hand on the blue air line is missing a seal.

34 / 40

Select the statement of what you should not do if you are required to drive through flowing water or deep puddles.

35 / 40

The object that doesn't get checked at the side of the trailer is the:

36 / 40

You do not have to stop at railroad crossings, but must slow down and carefully check for other vehicles:

37 / 40

When you discharge an unruly passenger, you must choose a place that is:

38 / 40

Tires should should be replaced:

39 / 40

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

40 / 40

Select the true statement about emergency brakes:

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CDL Category Practice Tests

CDL Practice Test

How To Get A maryland Commercial Drivers License

Applicants can apply for any CDL and necessary endorsements when they are 21 years of age or older. Applicants may apply for a restricted CDL at the age of 18 years old. This restricted CDL limits the driver to intrastate driving and doesn’t allow HazMat Certification, driving double or triple trailers, or driving school buses with children on board. All applicants must possess a current DOT medical card to be considered for their CDL.

All drivers that have the following issues are considered disqualified from receiving their Maryland CDL.

  • Having a current license suspended, revoked, denied, or canceled.
  • Possessing more than one state driver’s license.
  • Having restricted CDL driving privileges in another state.
  • Being convicted of driving impaired within 24 months prior to submitting a CDL application.

All applicants must successfully pass both a skills test and a knowledge test in order to receive their Maryland CDL. To receive specific endorsements, individuals must pass examinations about the endorsement as well.

X – Tank and Hazmat Endorsement
H – Hazardous Materials
N – Tank Vehicles
P – Passenger Vehicles
T – Double / Triple Trailers

Hit the Open Road

maryland CDL License Test Tips

Knowledge tests are required to receive Class A, B, and C CDLs and endorsements. All applicants must take a 50 question test and pass with a score of 40 or higher to receive their CDL permit. Those applying for a Class A license must take a 70 question test, with 20 of the questions pertaining directly to combination vehicles. All endorsements require their own specific examination that has been 20 and 30 questions. All assessments must be passed with a score of 80 or higher.

Each applicant is required to complete a three-section skills assessment. This assessment is comprised of a vehicle inspection, driving test, and basic control test. To pass the skills portion of the CDL assessment, applicants must successfully show their knowledge in all three areas. Those seeking vehicle-specific endorsements must take the skills test in that specific type of vehicle they want the endorsement for.

Additional Information

Information on the Maryland Motor Vehicle Administration

The Maryland Motor Vehicle Administration provides the oversight and administration of CDL requirements in Maryland. To get more information contact them via:


Phone:  410.424.3011


Additional Maryland CDL Helpful Links

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