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

As the driver of a bus, how can you best avoid hindering other traffic on the highway?

2 / 40

How often should air tanks be drained?

3 / 40

These tires should have a minimum tread depth of 4/32 inches.

4 / 40

Which is more likely to tip over due to the crack the whip effect?

5 / 40

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

6 / 40

What do yo need to do before supplying air to the air tanks of the second trailer?

7 / 40

Select the true statement about slack adjusters:

8 / 40

Select the true statement in regards to the center of gravity for tanks:

9 / 40

Which hazard classes must you NEVER smoke, or perform any activity involving fire, within 25 feet of?

10 / 40

What will probably happen if the converter dolly is still under the second trailer and the pintle hook is unhooked?

11 / 40

The method for testing hydraulic brakes for leaks is to _____.

12 / 40

What is the best way to stop all skids?

13 / 40

If you are already carrying 100 pounds of silver cyanide, what precautions must you take if you are given papers at a dock to carry 100 cartons of battery acid?

14 / 40

Where can you find a shipper’s certification?

15 / 40

You should make sure the_____before backing under a trailer.

16 / 40

When driving on a clear night with the vehicle lights on, your speed should be such that you can stop within _____.

17 / 40

After the initial drop, the maximum leakage rates per minute is:

18 / 40

The correct trailer height when coupling the rear trailer is:

19 / 40

While completing the 1st component of the air brake check you are required to fully push down on the foot brake and _____.

20 / 40

Animals and human foodstuffs should not be loaded in the same vehicle with?

21 / 40

When should the trailer hand valve be used?

22 / 40

How should the pintle hook be when backing a dolly under the second trailer?

23 / 40

What is the movement of the liquid called when the tanks are partially filled?

24 / 40

A safe haven is ______.

25 / 40

Select the definition for outage:

26 / 40

Which contains more alcohol: a 12-ounce glass of 5% beer, a 5-ounce glass of 12% wine or a 1 1/2-ounce shot of 80 proof liquor?

27 / 40

Which of these is a good rule for backing a straight bus?

28 / 40

How should the shut off valves at the rear of the trailer be when inspecting doubles?

29 / 40

Water is drained from the compressed air tanks because:

30 / 40

Select the purpose of fanning air brakes:

31 / 40

When driving a combination vehicle, the trailer breaks away severing the air lines. The trailer brakes should come on and ____.

32 / 40

In what position should the converter dolly air tank drain valves and pintle hook be in?

33 / 40

The best way to test if the spring brakes come on automatically is to:

34 / 40

You may use DANGEROUS placards instead of separate placards for each Table 2 hazard class when:

35 / 40

It is good practice to_____when uncoupling.

36 / 40

At a railroad crossing, the bus is required to stop at the stop line. If there is no clearly marked stop line, what is the required minimum and maximum stopping distance?

37 / 40

Check that the parking brake will hold by____when the parking brake is engaged and the trailer brakes released if not a combination vehicle.

38 / 40

What is most likely to occur when the front wheels begin to skid?

39 / 40

While driving at night, which lights should you use as often as you can?

40 / 40

You are driving a 40 foot truck at 35 MPH, how much space (in seconds) should you keep in front of you?

Your score is

The average score is 35%

5/5 - (2 votes)

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.