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

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

you will come to a complete stop

the emergency tractor brakes will activate

nothing will occur until you try to use the brakes

the trailer's air tank will leak through the one line

2 / 40

Select the true statement about convex ("spot") mirrors.

you do not need to look at them as often as flat mirrors

they are against the law in the majority of states

they make things look farther away and smaller than they actually are

they make things closer and larger than they really are

3 / 40

How high should you crank the landing gear?

for it to be 6 inches above the ground

as high up as it will go

until the crank handle is loose

so that you can clear railroad tracks

4 / 40

Select the first action to do when the low air pressure warning comes on:

come to a stop and safely park as soon as possible

adjust the engine brake

release the supply control valve

shift into a higher gear

5 / 40

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

false

only in a level loading dock

only at the end of a shift

true

6 / 40

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

apply pressure to the brake pedal until the wheels lock and then stay off of the pedal for as long as the wheels are locked

apply a firm pressure to the brakes, release the brake pedal once the wheels lock and then apply pressure to the brakes onces the wheels start rolling again

rapidly and lightly pump the brake pedal

apply a full hand valve until you stop and press firmly on the brake pedal

7 / 40

What are the three types of emergency equipment that you must have with your vehicle?

none of these answers are correct

first aid kit, fire extinguisher, flares

fire extinguisher, spare electrical fuses, warning devices for parked vehicles

warning devices for parked vehicles, first aid kit, flares

8 / 40

Select the true statement about slack adjusters:

they do not ever need to be adjusted

they should only be adjusted by a mechanic that is certified in slack adjusters

they should move a minimum of 2 inches from the push rod attachment

they can be adjusted automatically or manually

9 / 40

Select the true statement in regards to what the fifth wheel should be checked for.

if the jaws are open

all answers listed

if there is any missing or damaged parts

if it is properly greased

10 / 40

Overhead inside mirror is used to:

monitor traffic that approaches and enters the blind spot area

see the blind spot immediately behind the bus

see the area where students exit the bus

see all of the students

11 / 40

Before backing under the trailer after connecting the air lines you should:

double check to make sure the trailer brakes are off

have a random pedestrian direct your path of travel

take a walk around the vehicle to make sure it is clear of obstructions

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

12 / 40

Liquid surge affects the handling of a tanker by:

Decreasing the wind drag.

Moving the truck in the direction of liquid flow.

Allowing you to stop faster.

Allowing you to take tighter turns.

13 / 40

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

False, it's when the vehicle air braking system fails in some way

False, it's when the vehicle power system fails in some way

True

False, it's when the vehicle engine fails in some way

14 / 40

What is the movement of the liquid called when the tanks are partially filled?

Knocking

Crashing

Surging

Framing

15 / 40

A baffled tanker has:

Bulkheads with holes that allow liquid to flow through it.

Separate compartments inside the trailer.

No side to side surge.

Balls floating in it to increase the speed of the liquid movement.

16 / 40

Select the best description of a baffle tank:

None of the answers listed.

They are divided and have holes for liquid to flow through controlling surge.

It is one large tank.

They are tanks divided down into multiple smaller tanks.

17 / 40

What should you check for when inspecting a converter dolly?

that the converter dolly air tank drain valve is in the closed position

all answers listed

that the safety chains are secured to the trailer

that the spare tire is secured if there is one

18 / 40

Select the load of the trailer that will require the shorter distance to stop.

a fully loaded trailer

an empty trailer

a half loaded trailer

a 1/3 loaded trailer

19 / 40

The most dangerous time during the school bus ride is:

When loading and unloading students.

On long bus journeys.

When the students become unruly on the bus.

Crossing railway crossing.

20 / 40

You do not have to stop at railroad crossings, but must slow down and carefully check for other vehicles:

Where a policeman or flagman is directing traffic.

All of these answers are correct.

If a traffic signal is green.

At crossings marked as "exempt" or "abandoned".

21 / 40

What kind of surge can occur in a tank with baffles?

Back to front

All answers listed

Side to side

Bottom to top

22 / 40

What is the minimum amount of distance you should maintain when driving at 50 mph in ideal conditions with a 100 ft twin trailer combination?

6 seconds

8 seconds

13 seconds

11 seconds

23 / 40

Vehicle handling can become unsafe if the weight is not properly balanced. Hard steering can be caused by:

too little weight on the driving axles

too much weight on the steering axles

under loaded front axles

high center of gravity

24 / 40

Which trailer is most likely to tip over due to the crack the whip effect?

the first trailer of a triples

the heaviest trailer

the last trailer of a triple

the last trailer of a double

25 / 40

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

they take the same amount of time to stop when empty or loaded

they take longer to stop than bobtail tractors

they take longer to stop when they are empty

they take longer to stop when loaded down

26 / 40

What do you need to do to supply air to the air tanks of the second trailer?

open up the shutt off valves on the rear of the first trailer and close the shut off valve at the back of the second trailer

open the shut off valve at the back of both trailers

none of the answers listed

close the shut off valves at the back of each trailer

27 / 40

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

Quickly flash your high beams to give them fair warning.

None of these answers are correct.

Look slightly to the right at a right lane or edge marking, if available.

Turning your high beams on to "get back at them".

28 / 40

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

directly behind the trailer

directly in front of the trailer

about 12 degrees to the right

about 12 degrees to the left

29 / 40

How do you check the air compressor governor "cut in" and "cut out" pressures?

run the engine at a fast idle

monitor the air pressure gauge

all of these answers are correct

decrease the tank pressure by stepping on and off the brake

30 / 40

For emergency braking to avoid a crash when driving a double trailer you should:

slam down the brake pedal and keep pressure on it

none of the answers listed

do stab or controlled braking

use the trailer brakes only

31 / 40

Select the true statement in regards to your brake function when your ABS fails

there is a huge fire risk

the abs will need to be repaired but the brakes will function normally

you will need to pull over immediately

you will have no control over your truck as the brakes will not be functioning

32 / 40

Select the reason as to why air tanks need to be drained:

to prevent the left sided brake from locking up

to release water and other contaminents which may cause brakes to fail in freezing weather

tanks usually do not need to be drained

to provide greater control of your vehicle

33 / 40

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

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

Yes

Only in populated areas

34 / 40

At what pressure is the safety valve in the air compressor tank set to open?

100 psi

225 psi

125 psi

150 psi

35 / 40

The minimum tire tread depth for front tires is:

3/8-inch

1/32-inch

4/32-inch

1/2-inch

36 / 40

On a drawbridge, you do not need to stop, but must slow down and make sure it's safe, when:

None of these answers are correct.

The bridge has an attendant or traffic officer who controls traffic whenever the bridge opens.

There is a traffic light showing green.

Both of these answers are correct.

37 / 40

What is the purpose of a driver placarding his or her vehicle?

Forcing other drivers to stay 20 feet away in every direction.

Giving people something interesting to look at while driving.

Communicating risk.

Warning those with children to drive in another lane.

38 / 40

The sliding mechanism and locking device for a tandem axle on trailers is:

Apron

Metal frame

Suspension system

Locking pins/tandem release arm

39 / 40

Spring brakes are usually held back by_____during normal driving.

heat

clamps

pressure of the spring

air pressure

40 / 40

When is it acceptable for non-hazardous materials to be described by hazard class words or identification numbers?

During an emergency

Always

For hazards not described in the hazmat manual

Never

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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