minnesota
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

Commerical vehicles typically have this type of brake.

rectangle brakes

drum brakes

S-Cam brakes

stab brakes

2 / 40

The container for the mechanism that transforms the steering column action into wheel action is:

Steering linkage

Steering hoses/box

Locking pin

Air brake system

3 / 40

A commercial motor vehicle (CMV) is defined as:

a vehicle transporting hazardous materials

a vehicle with a gross weight over 26,001 lbs

all of these answers are correct

a vehicle transporting 16 or more passengers

4 / 40

What is the earliest way to notice a trailer skid?

you can feel it pulling your steering wheel

you can feel a jerk in the back of the tractor

you can see it in your mirrors

you can hear the tires squealing

5 / 40

Which hazard classes must you NEVER smoke, or perform any activity involving fire, within 25 feet of?

Class 1 only

Classes 1, 2, 3, and 4

Class 4 only

Class 2 only

6 / 40

Select which is not a mandatory emergency equipment:

Extra electrical fuses.

6 fuses, 3 red reflective triangles, or 3 liquid burning flares.

Tire changing equipment.

A rated and properly charged fire extinguisher.

7 / 40

How do you make sure the air lines are not crossed and the trailer brakes are working after supplying air to the trailer?

lift the brake pedal up

listen for brake sounds as you apply pressure off and on the trailer brakes

release the tractor brakes

activate the parking brakes

8 / 40

What is always required before loading, driving, or unloading a tanker?

Clean the vehicle

An inspection

Registration of driving plan

Shift into park

9 / 40

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

a helper

all of these answers are correct

rear view cameras

your mirrors

10 / 40

Select the true statement about retest markings:

Must have a date of the last retest marked.

They must be stamped on the tank.

All answers listed.

It shows what type of inspection or test was completed.

11 / 40

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

Have the rider pay a second fare.

Put the materials in the bus's "safe box".

Not allow the rider to do it.

Instruct the rider to sit next to an open window.

12 / 40

When should the trailer hand valve be used?

when parked in a service lot

when driving at highway speeds

to test the trailer brakes

all answers listed

13 / 40

The Emergency Response Guidebook (ERG):

Was created by the national department of transportation, so it is used nationwide.

Is studied by emergency personnel to help keep the public safe.

Contains an index of hazardous material id numbers, which is why you must label things correctly.

All of these answers are correct.

14 / 40

What must vehicles with air brakes have?

an air pressure gauge that shows the pressure available for braking

a minimum of 2 air tanks

an air pressure gauge that shows how much air is used by the brake chambers for braking

all of these answers are correct

15 / 40

Select the situation in which you should use the hand valve to park a combination vehicle.

in no situation

when parking on a grade

when parking at loading docks

during the winter

16 / 40

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

Yes

Only if you have more than 1,001 pounds of it

Only in populated areas

17 / 40

If you park the trailer at an angle to the tractor when uncoupling:

damage could occur to the landing gear

the process will be faster and easier

you won't have to take as many steps around the vehicle

you will have more space to maneuver in the lot

18 / 40

When checking for_____you are looking for dripping fluids or puddles on the ground below the transmission or engine.

air brake system

coolant level

leaks

power steering fluid

19 / 40

When does stab braking occur?

all of these answers are correct

when the wheels start rolling, apply the brakes

when the wheels lock up, release the brakes

apply pressure all the way on the brake pedal

20 / 40

Select the true statement about empty trucks:

empty trucks stop in the same distance as a fully loaded truck

empty trailers are easier to stop because there is not cargo shifting

they have poor traction due to wheel lockup and bouncing

they have a smaller stopping distance than full trailers

21 / 40

The 3 parts of the air brake system are: service brakes, parking brakes, and ____.

bolt brakes

v-cam brakes

disc brakes

foot brakes

22 / 40

Select the statement that tells you how you can check the low pressure warning signal.

Turn the electrical power on and apply pressure on and off the brake pedal to decrease the air tank pressure. The low air pressure warning signal must come on before the pressure drops to less than 60 psi in the air tank.

Turn the electrical power off and apply pressure on and off the brake pedal to decrease air tank pressure. The low air pressure warning signal must come on before the pressure drops to less than 30 psi in the air tank.

Turn the electrical power on and apply pressure on and off the brake pedal to increase air tank pressure. The low air pressure warning signal must come on before the pressure increases to more than 60 psi in the air tank.

The low pressure warning signal is only testable by the factory.

23 / 40

How should the trailer be lined up when preparing to back the tractor up?

directly in front of the trailer

about 12 degrees to the left

directly behind the trailer

about 12 degrees to the right

24 / 40

How should you inspect a converter dolly?

as if it is a trailer

as if it is an engine

as if it is an axle with a fifth wheel

as if it is cargo

25 / 40

You should____to check the free play of manual slack adjusters on S-Cam brakes.

chock the wheels and release the parking brakes after parking on a level ground

after parking on a slight grade, release the parking brake, activate the service brakes and check for vehicle movements

apply the parking brake after stopping on level ground

drain off air pressure before adjusting after parking on level ground

26 / 40

This should be cleaned and then adjusted properly while inside the cab.

The lug bolts

The windshield

The mirrors

The headlights

27 / 40

What is incorrect concerning disruptive passengers?

You must ensure the disurptive rider's safety as well as that of others.

It may be safer to wait and discharge the disruptive passenger at the next scheduled stop or a well-lighted area where there are other people.

Don't discharge such riders where it would be unsafe for them.

You must remove the disruptive passenger immediately for the safety of the others.

28 / 40

Select the true statement about speed and stopping distance.

None of these answers are correct.

You need two times the stopping distance when driving at 40 mph compared to 20 mph.

Tank surge will decrease your stopping distance.

When the road is wet it will double your stopping distance.

29 / 40

When approaching railroad tracks, stop your bus:

On the tracks so you can see if the train is coming.

15 and 50 feet before railroad crossings.

5-10 feet before railroad tracks.

Only if you have manual transmission, then proceed with flashers on.

30 / 40

In column 1, the "D" symbol means:

Domestic restrictions

Devices

Detonators

Domestic transportation

31 / 40

Always try to back toward the driver's side because

you can see better, watching the vehicle rear out the side window

your truck will naturally pull toward the driver's side

all of these answers are correct

it's more comfortable for turning your neck

32 / 40

How often should you check the tires on a placarded trailer that has dual tires?

Once every three hours.

Start of each day and every time you stop.

Each time you stop.

Once every 100 miles.

33 / 40

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

The locking pins

The release arm

The arm bar

The apron

34 / 40

Your bus starts to lean toward the outside on a banked curve, you are:

Driving with bad tires.

Driving on a wet surface.

Driving too fast.

Driving in the mountains.

35 / 40

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

when the governor stops between 75-90 psi

if the compressor cuts out at between 70 and 90 psi

when the pressure builds from 85 to 100 psi in less than 1 minute

if the pressure builds from 50 to 75 psi in less than 3 minutes

36 / 40

Select the true statement about what the Air Compressor Governor controls:

it controls when the brakes will be applied

it controls when air is released from the storage tank

it controls when the air compressor pumps air into the storage tanks

it controls when the warning system is activated

37 / 40

What does outage mean?

It is the allowance needed for the expansion of liquid.

It is how quickly the tanks drain.

It is the movement of the liquid.

It is the weight of the liquid.

38 / 40

When conducting a pre-trip inspection, the most important item to verify is _____.

that the radio transmits a signal

that the tire tread is sufficient for the expected driving conditions

that the registration is in the cup holder

that there are no leaks in the air brake system

39 / 40

Before backing under the trailer you should______when coupling a tractor and trailer with air lines already connected.

supply air to the trailer system and then pull the air supply knob out

all answers listed

have the trailer brakes off

press down on the brake pedal twice

40 / 40

Select the statement that best explains the "crack-the-whip" effect.

it is when you make a sudden movement of the steering wheel or a quick lane change and the tractor tends to rock and sway. The velocity of the rearmost trailer forces the tractor to roll over before the trailer.

it is when you make a sudden movement of the steering wheel or a quick lane change and the rear trailer tends to swing out. The force of the rear trailer becomes amplified, which will cause it to roll over (rearward amplification).

it is when the trailer is half full with the cargo loaded in the front half of the trailer. When you make a sudden movement of your steering wheel the cargo will forcefully slide towards the back of the trailer which will force the trailer to roll over.

it is when the trailer is half full with the cargo loaded in the rear half of the trailer. When you make a sudden movement of your steering wheel the cargo will forcefully slide towards the back of the trailer which will force the trailer to roll over.

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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.

Endorsements
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.

minnesota CDL Practice Test

CDL Category Practice Tests

CDL Practice Test

How To Get A minnesota Commercial Drivers License

Hit the Open Road

minnesota CDL License Test Tips

Additional Information

Information on the Minnesota Department of Public Safety

Additional Minnesota CDL Helpful Links

minnesota
CDL Practice Test