CDL Practice Test


Welcome to the Maine CDL practice test site. Questions on these practice tests are designed to mirror those that are found on the Maine CDL test. These tests are complimentary 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 Quiz" button below to begin.

1 / 40

How do you know when your brakes are fading?

2 / 40

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

3 / 40

A commercial motor vehicle (CMV) is defined as:

4 / 40

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

5 / 40

Commerical vehicles typically have this type of brake.

6 / 40

What keeps air in the tanks should the air compressor develop a leak?

7 / 40

You must first______to supply air to the trailer.

8 / 40

Where are shut off valves located on trailers that are doubles or triples?

9 / 40

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

10 / 40

What will occur if you cross the connect the air lines?

11 / 40

With most hazardous materials, you may park within 5 feet of the road briefly, if your work requires it. The materials that are the exception and do not allow parking this close to the road are:

12 / 40

What should you hear when you have the hand valve on and are testing the trailer brakes by opening the service air line at the back of the trailer?

13 / 40

A placard is required for a combustible liquid at?

14 / 40

Suspension systems:

15 / 40

Select why you should not use the trailer hand valve while driving:

16 / 40

When fueling a placarded vehicle, someone must always be:

17 / 40

Should your air compressor stop working:

18 / 40

School buses are one of the safest means of transportation. What two key factors contribute to this impressive safety record?

19 / 40

The air leakage rate for a combination vehicle should not exceed ____psi a minute.

20 / 40

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

21 / 40

Bus drivers must have a commercial driver license if they drive a vehicle designed to seat more than:

22 / 40

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

23 / 40

Which of the following hazard classes utilizes a transport index in order to determine how much of it can be loaded on a single vehicle for transport?

24 / 40

What will happen right away should the service air line come apart but the emergency line is intact while driving a combination vehicle?

25 / 40

Rods, connecting links, and arms from the steering box to the wheel are a part of the:

26 / 40

Overhead inside mirror is used to:

27 / 40

You should check the_____when loading small tanks equipped with bulkheads.

28 / 40

When using turn signals, which of the following should be avoided?

29 / 40

This item does not need to be checked during the cab check.

30 / 40

Which of the following is a reason to evacuate the school bus?

31 / 40

This object releases the fifth wheel locking jaw to allow uncoupling.

32 / 40

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

33 / 40

Which of the following statements about downshifting is NOT true?

34 / 40

What should you hear when you test the trailer brakes by opening the service air line at rear of trailer with the hand valve on?

35 / 40

Select the purpose of fanning air brakes:

36 / 40

How do you secure a second trailer to your combination vehicle?

37 / 40

Tankers used to transport hazardous materials on vehicles must be marked with:

38 / 40

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

39 / 40

When driving normally, some drivers use the hand valve before applying the brake pedal to prevent jack knifing. Select the most appropriate response to this statement.

40 / 40

_____ create a little above 90 degree angle between the adjuster arm and push rod when the brakes are released and no less than 90 degrees when the brakes are applied.

Your score is

The average score is 47%

4.5/5 - (2 votes)

CDL Category Practice Tests

CDL Practice Test

How To Get A maine Commercial Drivers License

Applicants can apply for their CDL at the age of 21 years old. Those who are between the ages of 18 years old and 21 years old can apply for a CDL with some restrictions. These drivers cannot possess a HazMat Endorsement, drive doubles or triples, or drive out of the state of Maine. All applicants for a Maine CDL must possess a Medical Examiner’s Certificate or DOT medical card.

Any of the following instances will disqualify a driver from obtaining their CDL in the state of Maine.

  • Having a currently suspended, denied, canceled, or revoked driver’s license.
  • Having more than one driver’s license from multiple states.
  • Being convicted of driving impaired in a commercial vehicle 24 months prior to applying.
  • Having CDL driving privileges revoked in another state.

Applicants applying for a Maine CDL must successfully complete the necessary knowledge and skills test to receive their new driving privileges.

H – Hazardous Materials
N – Tank Vehicles
P – Passenger Transport
T – Doubles / Triples
X – HazMat and Tank Vehicles
L – Air Brakes
S – School Bus

Hit the Open Road

maine CDL License Test Tips

To obtain a Maine CDL and any special endorsements individuals must take one or more knowledge tests. To get a Class A, B, and C commercial driver’s license you must pass a 50 question general knowledge test relating to commercial driving. Class A applicants will need to answer an additional 20 questions about combination driving. When an applicant is seeking endorsements, they will be required to complete one additional knowledge test per endorsement. Tank Vehicle, Doubles, Triples, and Passenger Endorsements all have 20 questions assessments. School Bus Endorsements and Air Brake Restriction Removals require a 25 question test.

Once an applicant passes all necessary knowledge tests, they will be required to complete a skills test. This tests the applicant’s knowledge of hands on driving experience, vehicle inspection, and basic vehicle control. All applicants applying for Passenger Transport and School Bus Endorsements as well as removal of the Air Brakes Restriction must pass an additional skills test.

Additional Information

Information on the Maine Secretary of State Bureau of Motor Vehicles

The Maine Bureau of Motor Vehicles provides the oversight and administration of CDL requirements in Maine. To get more information contact them via:


Phone:  207.624.9000


Additional Maine CDL Helpful Links

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