Michigan
CDL Practice Test

The Michigan CDL practice tests below offer practice test questions in all the different topic areas you’ll see on the Michigan CDL test. The tests are free and can be taken as often as you’d like to help you in your preparation for earning a Michigan commercial driver license. 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

This object should not be worn dangerously thin where visible.

The brake chambers

All answers listed

The air system lines

The brake linings

2 / 40

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

it controls when the brakes will be applied

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

it controls when air is released from the storage tank

it controls when the warning system is activated

3 / 40

What is most likely to occur when the front wheels begin to skid?

The power of the surge will disconnect the tank from the truck.

A roll over will occur.

You will continue heading in a straight line and moving forward no matter what direction you turn the steering wheel.

All answers listed.

4 / 40

You should never brake and should rely only steering inputs to avoid a crash while driving a tanker truck.

False

True

True, but only in ideal conditions

True, but only on downgrades

5 / 40

Select the true statement in regards to a converter dolly:

it is a coupling device with only two axles and a sixth wheel to which a semitrailer can be coupled to the rear of a tractor-trailer combination forming a double bottom rig

it is a connecting device consisting of one axle which disconnects a semitrailer combination vehicle converting it into two separate trailers

none of the answers listed

it is a coupling device with one or two axles and a fifth wheel with which a semitrailer can be coupled to the rear of a tractor-trailer combination forming a double bottom rig

6 / 40

The CDL manual indicates the last step on picking up students at the bus stop is as follows:

Activate the amber flashing caution lights to warn vehicles that the bus will stop to load passengers soon.

Place transmission in park or neutral and set parking brake.

Make a final check to confirm all traffic stops before opening the bus door and signaling students to approach.

Open the service door just enough to activate the alternating red light when traffic is in a safe distance from the bus.

7 / 40

The baffles in a tank trailer help to control:

The distrubition of weight.

The movement of liquid from front to back.

The flow of liquid side to side.

The overall weight of the vehicle.

8 / 40

After the initial drop, the maximum leakage rates per minute is:

10 psi for combination vehicle and 5 psi for single vehicle

6 psi for a combination vehicle and 5 psi for single vehicle

4 psi for a combination vehicle and 3 psi for a single vehicle

3 psi for combination vehicle and 1 psi for single vehicle

9 / 40

Select the purpose of fanning air brakes:

it decreases the braking power

lower air pressure

it cools them down

it increases the air pressure

10 / 40

Select the false statement about tractor protection valves.

if the air pressure is low it will automatically close

the trailer air supply valve in the cab controls it

should the trailer air leak, it keeps the air in the tractor

air is allowed to leak from the tractor line when it is closed

11 / 40

Do not tow or push a disabled bus with riders aboard the vehicle, unless:

Your employer tells you to.

You are also a class a tow truck driver.

Getting off the bus would be unsafe.

Bus is on a drawbridge.

12 / 40

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

Mud flaps

The lockjaw

Tires

Electric/air lines

13 / 40

What is a technical name?

The name for a hazardous material most commonly used in the trucking community, accepted as standard.

The medical term for hazardous materials used by medical personnel.

The name for a hazardous material most commonly used on the street.

The name for a hazardous material used in scientific journals and texts, recognized as its chemical and microbiological name.

14 / 40

Do empty trucks have the best braking?

yes, but only on wet surfaces

yes, but only if the truck is newer than 1998

yes

15 / 40

Which of the following types of cargo can never be carrier on a bus with riders?

Emergency drug shipments.

Emergency tear gas.

Emergency hospital supplies.

Small arms ammunition (orm-d).

16 / 40

To test the tractor-trailer connection for security, you should:

drive forward in a low gear with the trailer brakes locked and then look at it carefully

drive forward in a high gear with the trailer brakes on and check it

rock the trailer side to side with the trailer brakes on

drive forward with a sharp jerk

17 / 40

What position should the tractor protection control valve be in after coupling?

raised

lowered

mid position

normal

18 / 40

Most states require school bus drivers to take a physical examination:

Every 2 years

Annually

Every 3 years

Twice per year

19 / 40

A portable tank differs from a cargo tank in that ______.

none of these answers are correct

cargo tanks are bulk containers, which are not permanently attached to a vehicle

portable tanks are bulk containers, which are permanently attached to a vehicle

portable tanks are bulk containers, which are not permanently attached to a vehicle

20 / 40

The system that needs to be checked for signs of leaks with rust or carbon soot and damage is the _____.

none of the answers listed

exhaust

fifth wheel

air brake system

21 / 40

Which of the following are possible causes of tire fires?

loose fuel connections or under-inflated tires

dual tires that touch and under-inflated tires

improperly loaded cargo and dual tires that touch

poor cargo ventilation or short circuits

22 / 40

Which of the following is a necessary qualification for non-bulk packaging?

Maximum net mass of 400 kg, or less than 450 l if used as a receptacle for a solid.

A maximum capacity of 450 l or less if it is used as a receptacle for liquids.

Maximum water capacity of 454 kg or less if used as a receptacle for gases.

All of these answers are necessary qualifications.

23 / 40

What does the drain valve for air tanks remove?

oil and dirt

oil and water

air and oil

water and air

24 / 40

When would you lock some emergency roof hatches in a partly open position?

First day of spring

Never

Whenever you enter a tunnel

For fresh air

25 / 40

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

The mirrors

The headlights

The lug bolts

The windshield

26 / 40

What color and shape is the trailer air supply control?

it is an 8-sided knob that is red

it is a square knob that is red

it is a square knob that is yellow

it is a triangle-shaped knob that is red

27 / 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:

the trailer emergency brakes to activate

none of the ansers listed

the trailer tank pressure to decrease

the tractor spring brakes to activate

28 / 40

Your rig should be parked on__to uncouple double trailers.

a downgrade

grass

the company's lot

level ground

29 / 40

This item should be firmly attached the to frame, be solid, and clear of objects:

The catwalk

The locking jaw

None of these answers are correct answers are correct

The lock pins

30 / 40

Which of the following statements about "Radioactive" labels is true?

Yellow ii indicates the highest level of radioactivity.

Black iii indicates the highest level of radioactivity.

Yellow iii indicates the highest level of radioactivity.

White i indicates the highest level of radioactivity.

31 / 40

A shipment described on the Hazardous Waste Manifest may only be delivered to another _______ carrier or treatment facility, who then signs the ______, giving you a copy which you must keep.

registered, uniform hazardous waste manifest

trucking, uniform hazardous waste manifest

responsible, papers

licensed, manifest

32 / 40

When approaching a school bus stop, you should:

Continuously check all mirrors.

Gradually decrease speed until the stop.

All of these answers are correct.

Activate your overhead amber lights.

33 / 40

What are spring brakes?

they are powerful springs that hold back air pressure when driving

they do not function when the psi falls below 30 psi

they are brakes that automatically come on for a truck or trailer when the psi drops too low

all of these answers are correct

34 / 40

When stopped on a divided highway where should your reflectors be placed?

10 feet, 100 feet, and 200 feet toward the approaching traffic

30 feet, 100 feet, and 150 feet toward the approaching traffic

20 feet, 150 feet, and 300 feet toward the approaching traffic

15 feet, 75 feet, and 150 feet toward the approaching traffic

35 / 40

When should you drain air tanks that do not have an automatic tank drain?

once every 7 days

once every 14 days

every 4 hours of the working shift

at the end of each working day

36 / 40

The brake pushrod should not move more than____for manual slack adjusters.

checking is not required in vehicles built after 1994 as they have automatic slack adjusters

1-2 inches while the brakes are set

an inch when pulled by hand with the brakes released

movement is not allowed

37 / 40

Unless you_____you will feel the effects of a liquid surge.

make turns carefully and slowly

haul thick liquids

all answers listed

gradually come to a stop

38 / 40

Which of the following about the front tires on a commercial bus is true?

Must not have recapped or regrooved tires.

Can be regrooved or recapped as long as they have 4/32 tread depth.

Must not be recapped, but can be regrooved.

Can be recapped, but never regrooved.

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

press down on the brake pedal twice

have the trailer brakes off

40 / 40

A commercial motor vehicle (CMV) is defined as:

a vehicle with a gross weight over 26,001 lbs

a vehicle transporting 16 or more passengers

a vehicle transporting hazardous materials

all of these answers are correct

Your score is

The average score is 0%

5/5 - (1 vote)

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How To Get A michigan Commercial Drivers License

Applicants must be of the legal age of 18 or older. Those between the ages of 18 and 21 are only permitted to drive a commercial vehicle within the state of Michigan. Those age 21 and older may drive a commercial vehicle across state borders. Only those aged 21 and older may apply for their hazardous materials endorsement. All applicants must possess a DOT Medical Card.

An applicant’s driving record will be considered when applying for a CDL license. There are specific items in which a driver will be disqualified for a commercial driver’s license.

These include:

Any suspension/revocation 36 months before submitting an application.
Any six-point violation or conviction of operating a motor vehicle impaired 24 months prior to submitting an application.
Any current denial, cancellation, suspension, or revocation of driver’s license.
Possessing multiple licenses from other states.
Not meeting BFS-103 CDL Certifications.

Michigan requires all CDL applicants to complete both a knowledge test and a skills test. Michigan offers the following CDL license endorsements:

S – School Bus
T – Double Trailer
P – Passenger
N – Tank Vehicles
H – Hazardous Materials

Hit the Open Road

michigan CDL License Test Tips

The knowledge tests are presented in written form for Class A, B, and C applicants. All classes are required to take a 50 question assessment. Those applying for a Class A CDL will need to complete an additional 20 questions about combination vehicles.

Applicants seeking to drive vehicles with air brakes must complete a 25 question air brake assessment. Those seeking any endorsement other than hazardous materials must complete a 20 question assessment that is endorsement specific. Those applying for the hazardous materials endorsement must complete a 30 question knowledge test. All applicants must receive a score of 80 percent or higher on each test to pass.

A skills test is required for all CDL applicants regardless of Class. The School Bus and Passenger Endorsements require a skills test as well. All applicants applying for Air Brakes Certification must use a vehicle that is equipped with air brakes for their skills test. The CDL skills test consists of a vehicle inspection test, basic control skills test, and a driving test. All three test sections must be passed for CDL approval. Failure in any skills test area automatically fails the applicant.

Additional Information

CDL Testing by the Michigan Secretary of State

The Michigan Secretary of State provides administers CDL license requirements in Michigan. To get more information contact them via:

Website: https://www.michigan.gov/sos/0,4670,7-127-1627_8669_53324---,00.html

Phone: 888.767.6424

Additional Michigan CDL Helpful Links

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

Michigan CDL Practice Test