Wisconsin CDL Air Brakes Test (2024) - FREE CDL Practice Test

1. Supply pressure gauges tell you:

how much pressure is in the air tanks.
how much air pressure you are applying to the brakes.
when the pressure in the system drops below 60 psi.
when the air pressure in the tanks falls below 60 psi.

2. If the air tanks are not drained:

your speed must be reduced to 5 MPH below your “safe” speed.
the air pressure in the tanks is reduced.
the water can freeze in cold weather and cause brake failure.
the spring brakes will come on.

3. Brake lag is:

the distance your vehicle will travel, in ideal conditions, while you are braking.
the amount of air pressure required to stop the vehicle.
the distance your vehicle will continue to travel, in ideal conditions, before you hit the brakes.
the time required for the air brakes to work after the brake pedal is pushed.

4. An Anti-lock Braking System (ABS):

lets you drive faster.
keeps your wheels from locking up when you brake hard.
increases your normal braking capability.
always shortens your stopping distance.

5. In vehicles with air brakes, the air compressor governor:

controls how much air the air compressor will pump into the air storage tanks.
controls when the air storage tanks will pump air into the air compressor.
controls when the air compressor will pump air into the air storage tanks.
None of the above.

6. Most heavy vehicles require ________ change gears.

single clutching
double shifting
triple shifting
double clutching

7. You should NOT use the parking brakes if:

the brakes are too dry.
the brakes are cold.
the brakes are very hot.
All of the above.

8. How many reflective triangles/emergency reflectors should you carry?

2
1
4
3

9. Air brakes are 3 different braking systems: service brake, parking brake, and _______ brake.

emergency
foot
S-cam
air storage brake

10. If are being followed closely, you should:

change lanes quickly.
flash your brake lights.
increase your following distance.
decrease your following distance.

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Frequently Asked Questions

If you're between 15 and 18, you must comply with the Graduated Driver License program. You can obtain an instruction permit at 15 years old. Then, once you're at least 16 years old and have held the permit for at least six months, you can apply for a probationary driver license. To obtain a regular driver license (class D), you must be at least 19 years old.

If you're 18 years old or older, you must hold the permit for a minimum of seven days before applying for a probationary driver license.

You cannot schedule appointments for the DMV written test because they are conducted on a walk-in basis. Verify if your chosen Wisconsin DMV office provides permit tests before you go. Keep in mind that it usually takes around 45 minutes to finish, so make sure to arrive with enough time before the office's closing hours to complete the exam.

You'll need to bring specific documents to prove your eligibility:

A completed Wisconsin Driver License Application. If you're under 18 years old, your application must be signed by the instructor of the driver education program you're enrolled in, and you must have the signature of a parent/guardian or sponsor.
Proof of U.S. citizenship or legal permanent resident status.
Proof of your name and date of birth.
Proof of identity.
Proof of Wisconsin residency if you're 18 or older.
Proof of Social Security number.
Proof of enrollment in school or a high school diploma (for applicants under 18).

The DMV written test in Wisconsin is offered in English, American Sign Language, Burmese, Chinese, Croatian, Hmong, Polish, Russian, Serbian, Somali, Spanish. Audio assist option is available upon request.

To prepare for the DMV written test, read the Wisconsin Driver's Handbook. Pay attention to road signs, parallel parking, turning, passing a vehicle, yielding the right of way, etc. Test your knowledge with our practice tests or sign up for Premium, which offers extra resources to get ready for your exam.

If you operate with an instruction permit in Wisconsin, there are specific restrictions:

- You must be accompanied by a licensed parent/guardian/spouse who is at least 19 years old and has at least two years of driving experience, seated beside you. Alternatively, you may be accompanied by a person 21 years or older with written authorization from your parent/guardian (if you are a minor).

- If you are 16 or older, you can transport one other licensed driver who is at least 25 years of age and has at least two years of driving experience, in addition to your supervisor.

If you operate with a probationary license, the following restrictions apply during the first nine months:

- You can drive alone between 5 a.m. to midnight and transport siblings and one licensed adult with two years or more of driver experience.

- From midnight to 5 a.m., you can only drive alone for work or school activities, or you must be accompanied by a parent/guardian, an instructor/spouse who is 19 or older, or a person 21 or older.

If you're under 21 years old, it's prohibited to drive after consuming any amount of alcohol.

A Wisconsin class D instruction permit is valid for 18 months, and it can be renewed online within 8 years (if you are 64 or younger). It is not required to retake the DMV test within 8 years of its expiration. Applicants under 18 years old must provide proof of enrollment or completion of a driver education course.

If you don't pass your DMV written test in Wisconsin, you can retake it the next day. You have five attempts in one year. After the fifth failure, you'll need to get special permission from DMV staff before trying again.

Number of questions:	25
Correct answers to pass:	20
Passing score:	80%

CDL AIR BRAKES PRACTICE TEST - WISCONSIN

Frequently Asked Questions

1 How old do you have to be to get a driver's license in Wisconsin?

2 How can you schedule the DMV test?

3 What documents do you need to apply for a driver’s license in Wisconsin?

4 Is the DMV test only provided in English?

5 How can you prepare for the Wisconsin DMV test?

6 What are the restrictions for new drivers in Wisconsin?

7 How long is a Wisconsin permit valid for?

8 What happens if you fail your DMV test?

WI CDL Air Brakes Test