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

Select the factor that has no effect on how much liquid you can carry:

2 / 40

When does your vehicle's single brake system need an adjustment?

3 / 40

Which seats not securely fastened to the bus are usually allowed?

4 / 40

If you work for an interstate carrier:

5 / 40

Which of the following is the proper definition of a cargo tank?

6 / 40

The two main things to look ahead for while driving are _____.

7 / 40

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

8 / 40

Select the true statement in regards to when a bulk tank vehicle stops at an intersection on a slippery surface:

9 / 40

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

10 / 40

The most stable tanker shape is:

11 / 40

On a bus, you may sometimes haul small-arms ammunition, emergency shipments of drugs, or hospital supplies. The total weight of all such hazardous materials must not be greater than:

12 / 40

What will happen should a driver cross the air lines when hooking up the an older trailer?

13 / 40

The correct trailer height when coupling the rear trailer is:

14 / 40

While completing the 2nd component of the air brake check you are required to turn the electrical power on, begin fanning off the air pressure by rapidly relasing and apply the foot brake and _____.

15 / 40

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

16 / 40

Select the true statement in regards to empty trucks:

17 / 40

Within 3 minutes, this gauge pressure should build to 90 psi from 50 psi.

18 / 40

Which of the following should you do when driving the school bus in high wind?

19 / 40

Select when you should use the hand valve to park a combination vehicle.

20 / 40

What is a passive railway crossing?

21 / 40

Cylinders containing compressed gases may only be loaded onto a vehicle without a flat floor or platform if the cylinders are:

22 / 40

The front trailer supports should be____before driving away.

23 / 40

"Outages" is the word to describe the amount of space required for liquids to expand in as they warm.

24 / 40

If you are carrying Division 1.2 or 1.3 materials, how far away must you park from the traveled portion of the roadway?

25 / 40

What is the best way to stop all skids?

26 / 40

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

27 / 40

A truck with baffles will handle:

28 / 40

How much space should you see between the lower and upper fifth wheel when checking the coupling of a converter dolly?

29 / 40

What is the earliest way to notice a trailer skid?

30 / 40

You should look into the back of the fifth wheel on a dolly to see if it is locked onto the kingpin.

31 / 40

Select the factors that can cause your brakes to fade or fail:

32 / 40

If there is rust around the nuts, what may it indicate?

33 / 40

Two causes of tire fires are ______.

34 / 40

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

35 / 40

An example of a low pressure warning signal for air brakes is:

36 / 40

If the hazardous materials are classified as FORBIDDEN you should:

37 / 40

You should___to reduce the air leakage rate.

38 / 40

The best way to describe a dual air brake system is:

39 / 40

In what location must you keep your shipping papers which describe any hazardous materials?

40 / 40

Which of these statements about signaling is correct?

Your score is

The average score is 45%

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.