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

When you have a major leak in the service line and put on the brake, the service air pressure will escape and cause the:

2 / 40

Select the true statement in regards to handing triples and doubles

3 / 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 _____.

4 / 40

To maintain alertness during the trip, drivers should:

5 / 40

To find out if a shipment includes a hazardous material, you should:

6 / 40

What is most likely to occur when driving a set of doubles and a set of trailer wheels goes into a skid?

7 / 40

Select whether the following statement is true or false: Front wheel brakes are good to use in all conditions.

8 / 40

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

9 / 40

Off-tracking happens when going around a corner and:

10 / 40

Which of the following types of cargo must never be carried on a bus with passengers?

11 / 40

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

12 / 40

An "A/W" the first column of the hazardous materials table means:

13 / 40

A commercial motor vehicle (CMV) is defined as:

14 / 40

What action should you take before driving while drowsy?

15 / 40

A slack adjuster is:

16 / 40

The method used to make sure the spring brakes will come on automatically is to:

17 / 40

Your engine runs a pump when you are delivering compressed gas. Should you turn off your engine before or after you unhook the hoses after finishing that delivery?

18 / 40

You should_____to make an emergency stop with air brakes when using the stab braking method.

19 / 40

The baffles in a tank trailer help to control:

20 / 40

Play of the steering wheel should not exceed:

21 / 40

What is the benefit of ABS?

22 / 40

When you discharge an unruly passenger, you must choose a place that is:

23 / 40

Puddles or dripping fluids from the underside of the transmission and engine may indicate:

24 / 40

Why should you know the outage?

25 / 40

The trailer should be lowered so that _____.

26 / 40

Buses may carry small-arms ammunition labeled ORM-D, emergency hospital supplies, and drugs. However, buses must never carry:

27 / 40

What is incorrect concerning disruptive passengers?

28 / 40

How much space should there be between the lower and upper fifth wheel?

29 / 40

Students exit the bus and walk:

30 / 40

The cause of almost half of all truck driver deaths are:

31 / 40

Suspension systems:

32 / 40

Select the true statement in regards to managing the space to the sides:

33 / 40

The amount of liquid you can carry depends on:

34 / 40

You should line up_____when getting ready to back under the trailer.

35 / 40

What is a king pin?

36 / 40

You should____in order to inspect the coupling.

37 / 40

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

38 / 40

Cargo tanks are:

39 / 40

Which of the following should you do when confronted by an aggressive driver?

40 / 40

Which of the following is not a prohibited practice on the bus:

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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.