CDL Practice Test


As you prepare to earn your CDL in the state of Minnesota you’ll need to study for the written portion of the Minnesota CDL test. This site offers MN CDL practice tests to help you on your journey. Use this site as a study guide as you prepare to take the CDL Test in Minnesota. Questions on these practice tests cover topics from the MN CDL manual. You can take these practice tests as many times as you need to and the tests are free. Good luck as you look to obtain your Minnesota CDL. 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

Which of the following are possible causes of tire fires?

2 / 40

Drivers placard their vehicle to _____ the risk.

3 / 40

When inspecting the_____you pump the pedals 3 times and then hold it down for 5 seconds feeling for no movement to occur.

4 / 40

To be sure that air is supplied to the second trailer:

5 / 40

Suspension systems:

6 / 40

The reason a bulk liquid tanker is hard to handle is:

7 / 40

When accelerating:

8 / 40

A tank trailer should never be fully loaded due to:

9 / 40

Which of the following is NOT an acceptable type of marking for hazardous materials?

10 / 40

Select the correct setup for shut-off valves:

11 / 40

A minimum tread depth of 2/32 inch is required for:

12 / 40

Select the true statement about baffled tankers:

13 / 40

The most stable tanker shape is:

14 / 40

What is the reason that placards are used?

15 / 40

When stopping for railroad tracks, you must stop no closer than how many feet before the nearest track?

16 / 40

An air system that is fully charged will typically have ___ psi of pressure.

17 / 40

You should_____when checking the slack adjusters on S-Cam brakes.

18 / 40

You are inspecting the_____when looking for broken welds, cracks, holes, or other damage to the longitudinal frame member, cross members, box, and floor.

19 / 40

You should_____when an emergency requires you to quickly stop your tanker.

20 / 40

The air leakage rate for combination vehicles should not be more than _ psi a minute.

21 / 40

There must not be more than_____for engine compartment belts.

22 / 40

What should you hook up before backing a tractor to a trailer for coupling?

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 true statement about speed and stopping distance.

25 / 40

How should the shut off valves at the rear of the trailer be when inspecting doubles?

26 / 40

The manual says you should look _____ ahead while driving.

27 / 40

Select the false statement about tractor protection valves.

28 / 40

Do you need to stop before a railroad crossing if you are hauling 100 pounds of Division 4.3 Dangerous When Wet material?

29 / 40

Which of the following statements about downshifting is NOT true?

30 / 40

Select the inappropriate way to test for the low pressure warning signal.

31 / 40

What does the amount of liquid allowed in the tank depend on?

32 / 40

What is a supply pressure gauge used for?

33 / 40

This object should not be spliced, cut, chafed, or worn through to allow steel braid to show.

34 / 40

The main reason you should pull the dolly out from under a trailer before disconnecting it from the trailer in front is:

35 / 40

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

36 / 40

Which of the following types of emergency equipment must you have on your bus?

37 / 40

What gauge on the dashboard indicates electrical system charging rate?

38 / 40

The trailer height is correct for connecting a converter dolly to a second trailer when:

39 / 40

You must keep shipping papers describing hazardous materials ______.

40 / 40

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

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CDL Category Practice Tests

CDL Practice Test

How To Get A minnesota Commercial Drivers License

Minnesota has set specific requirements of a CDL license for the operation of specific vehicles. The first is a combination vehicle that exceeds a gross weight of 26,000 pounds. Any single vehicle that exceeds the 26,000 pounds also requires a CDL. Vehicles intended to transport more than 15 passengers, including the driver, fall under the commercial driver’s license requirement. Any vehicle that requires hazardous material placards must be driven by a CDL driver. Lastly, any school bus driver must have their CDL. Applicants may file for a Class A, B, or C commercial driver’s license. Each class has its own restricts for the vehicle size and type that may be legally driven.All applicants must be 18 years of age or older to apply for a commercial driver’s license. A Hazardous Materials Endorsement may only be obtained by those who are 21 years of age or older. All applicants must possess a DOT medical card or submit a medical examiner certificate upon applying for their commercial driver’s license.

Driving Record And Disqualifications 

  • Any conviction of driving an impaired vehicle within the past 24 months.
  • Current license is suspended, denied, canceled, or revoked.
  • Possessing a driver’s license from another state.

All CDL applicants must pass one or more knowledge tests and skills test to be eligible to receive their CDL.

H – Hazardous Materials
N – Tank Vehicle
P – Passenger Transport
S – School Bus
T – Doubles / Triples
X – Tanker and Hazardous Materials

Hit the Open Road

minnesota CDL License Test Tips

All applicants will be required to take one or more knowledge tests depending on the class and the endorsements they wish to obtain. Knowledge tests are given on paper and on the computer. All Class applicants must complete a 50 question knowledge test, with Class A applicants also required to complete 20 questions about combination vehicles. Endorsements require their own specific tests. For Passenger, Doubles/ Triples, and Tank Vehicle Endorsements applicants will be given a 20 question test. For School Bus Endorsement and Air Brake Restriction Removal a 25 question test will be given. A Hazardous Materials Endorsement requires a 30 question test. Test scores of 80 percent and higher are considered passed.

A skills test is required of all applicants to be taken in the type of vehicle in which they are seeking certification. The skills test is given in three different phases. These include the pre-trip inspection, basic control skills, and the road test. Applicants must pass all three phases of the skills test to receive their CDL. Additional skills tests are required for specific endorsements. These include Passenger and School Bus Endorsements as well as the Air Brake Restriction Removal.

Additional Information

Information on the Minnesota Department of Public Safety

The Minnesota Department of Public Safety provides administers CDL license requirements in Minnesota. To get more information contact them via:

Website:  https://dps.mn.gov/divisions/dvs/Pages/drivers-license-information.aspx#ClassA

Phone:  651.297.5029


Additional Minnesota CDL Helpful Links

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