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

Which of the following statements about downshifting is NOT true?

2 / 40

Play of the steering wheel should not exceed:

3 / 40

What is a supply pressure gauge used for?

4 / 40

How do you know when your brakes are fading?

5 / 40

You should be extra cautious when___while driving a smooth bore tanker combination.

6 / 40

If a rider wants to bring a car battery or a can of gasoline or kerosene aboard your bus, you should:

7 / 40

What does the amount of liquid you can carry depend on?

8 / 40

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

9 / 40

What is the correct number of red reflective triangles that you should carry?

10 / 40

You are required to have a tank endorsement when transporting:

11 / 40

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

12 / 40

At around____the governor allows the air compressor to start pumping again:

13 / 40

Carry-on baggage cannot be stored:

14 / 40

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

15 / 40

Select the true statement in regards to large combination vehicles taking longer to stop.

16 / 40

What does it mean when the safety valve releases air?

17 / 40

The interlock system for the brake and accelerator on a transit coach may be used:

18 / 40

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

19 / 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?

20 / 40

Water is drained from the compressed air tanks because:

21 / 40

What is a king pin?

22 / 40

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

23 / 40

You should make sure the_____before backing under a trailer.

24 / 40

A shipper’s certification is best described as _____.

25 / 40

In what position should the converter dolly air tank drain valve be in for double trailer combination?

26 / 40

There are 2 reasons as to why hauling liquids take special care. One reason is the ___center of gravity.

27 / 40

Which of the following statements about the bus interior is false?

28 / 40

Alcohol evaporators in some air brake systems help to:

29 / 40

Why is understanding the loading and unloading procedures so critical?

30 / 40

Another term for a smooth bore tank is:

31 / 40

What are the 3 methods for securing a second trailer before coupling?

32 / 40

The locking jaws of the kingpin should close around:

33 / 40

Which of the following statements about overhead space is true?

34 / 40

A "transport index" relates to products that are:

35 / 40

When there is a hazardous materials emergency. You should:

36 / 40

Start by___when coupling.

37 / 40

An oncoming vehicle keeps its high beams on. You should deal with this hazard by:

38 / 40

How high should you crank the landing gear?

39 / 40

Select the true statement in regards to an application pressure gauge:

40 / 40

What position should the tractor protection control valve be in after coupling?

Your score is

The average score is 67%

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.