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

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

2 / 40

Do not tow or push a disabled bus with riders aboard the vehicle, unless:

3 / 40

The 3 parts of the air brake system are: service brakes, parking brakes, and ____.

4 / 40

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

5 / 40

Select the part that is not a part of the drum brake:

6 / 40

Surge affects the handling of a tanker by:

7 / 40

You should activate hazard lights within approximately how many feet before railroad crossing?

8 / 40

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

9 / 40

What action should you take before driving while drowsy?

10 / 40

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

11 / 40

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

12 / 40

Overhead inside mirror is used to:

13 / 40

At 55 miles-per-hour it takes about 6 seconds to stop a fully loaded truck and the braking distance is:

14 / 40

What is the brake system that applies and releases the brakes when the brake pedal is used?

15 / 40

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

16 / 40

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

17 / 40

When fueling a placarded vehicle, someone must always be:

18 / 40

What do you check when doing a visual inspection of the coupling?

19 / 40

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

20 / 40

What is the purpose of a baffle?

21 / 40

You should decrease to a safe speed before entering a curve and then_____through it.

22 / 40

A bus has a GVWR of 22,000 pounds and seats 24 passengers. What CDL class is this vehicle?

23 / 40

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

24 / 40

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

25 / 40

Which of the following statements is true about speed management?

26 / 40

Select which is not an engine compartement belt:

27 / 40

The gauge that needs to come up to normal levels after starting the engine within a few seconds is _____.

28 / 40

If you are hauling hazardous materials and have ___ tires on your vehicle, you must stop and check them every time you park.

29 / 40

This gauge has a governor cut-off.

30 / 40

Which of the following materials would be an acceptable floor liner for moving Division 1.1 or 1.2 materials?

31 / 40

How do you check the air flow to the last trailer?

32 / 40

You should check that the _____are secure, caps are on tight, and is not leaking.

33 / 40

Under which two special conditions should you downshift?

34 / 40

The safety catch for the fifth wheel locking lever must be ____ for a coupling to be complete.

35 / 40

Students exit the bus and walk:

36 / 40

The front trailer supports should be____before driving away.

37 / 40

Why should you test the tractor protection valve?

38 / 40

A drawbridge does not have a traffic light showing green or a traffic control attendant. How many feet before the draw of a bridge must a bus driver stop?

39 / 40

What is the service air line controlled by?

40 / 40

Which of the following must drivers have in their possession while transporting class A or B explosives?

Your score is

The average score is 57%

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.