South Dakota CDL Air Brakes Test (2024)

1. In a vehicle with a dual air brake system:

each system has its own air tanks.
one system supplies air to the trailer.
both systems typically operate the regular brakes on the rear axle.
All of the above.

2. After supplying air to the trailer brake system, you should check the brake system for crossed air lines by:

shutting the engine off so you can hear the brakes.
checking the air brake system pressure gauge for signs of major air loss.
applying and releasing the trailer brakes and listening for the sound of trailer brakes.
All of the above.

3. The heavier the vehicle:

the more work the brakes must do to stop it.
the higher the center of gravity will be.
the less work the brakes must do to stop it.
None of the above.

4. With brake drums, if brakes become too hot:

your ABS will malfunction.
the air compressor will kick on to cool the brakes.
the brakes will supply too much power to the drive wheels.
the brakes may stop working.

5. The air compressor stops pumping air into the air storage tanks when air tank pressure rises to around:

125 psi.
450 psi.
100 psi.
250 psi.

6. If your ABS is not working:

it will slow your truck to a halt and force you to pull over.
the drive wheels will begin to spin, and you should take your foot off the accelerator.
you still have normal brake functions, and should drive and brake as you always have.
you should immediately bring your vehicle to a complete stop.

7. Which of the following is a reason why air tanks must be drained?

Your brakes may fail due to the water freezing.
Your battery fluid may drain out.
The governor may stop the compressor from pumping air.
Your transmission fluid may drain out.

8. A low air pressure warning signal must come on when the air pressure in the tanks falls below:

15 psi.
10 psi.
100 psi.
60 psi.

9. When a tire fails, you must:

hold the steering wheel firmly.
get out and check all the tires after you have come to a stop.
stay off the brake.
All of the above.

10. The service brake applies and releases:

the parking brake when you use the parking brake control.
the brake when you use the brake pedal during normal driving.
the brake in an emergency situation.
None of the above.

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Frequently Asked Questions

You can obtain an instruction permit when you are at least 14 years old. If you are under 18, you can apply for a restricted permit after holding the permit for 275 days (or 180 days if you have completed a driver education course). To obtain a full operator’s license, you must be at least 16 years old and have held a restricted permit for at least 6 months.

To take your permit test in South Dakota, you can simply visit any South Dakota driver license exam station. However, scheduling an appointment online or calling 605-773-6883 can help minimize wait times. If you've completed an approved driver education course within the past year and can provide a certificate as proof, you may waive the DMV test.

Make sure you have these documents:

Proof of date of birth, identity, and lawful status in the US (Birth certificate, U.S. passport…). If your legal name differs, provide proof with a marriage certificate or a court order.
Proof of Social Security number.
Two proofs of residential address (such as utility or phone bill, mortgage document, or bank statement). If you are minor, a parent/guardian could provide these for you.
Completed License Application Form. For minors, a parent/guardian must sign the parent/guardian consent section in front of a driver examiner or in front of a notary public.

The DMV written test in South Dakota is offered in both English and Spanish. It is advisable to have a basic understanding of English since you will find road signs always in English when driving.

The DMV written test covers various topics, such as road signs, parallel parking, turning, passing a vehicle, yielding the right of way, etc. Studying the official South Dakota Driver’s Handbook is the first step to pass the exam because it contains all of this information. Once you've read it, you can take our free practice tests to test your preparation.

For new drivers in South Dakota, specific restrictions apply depending on the type of permit held.

With an instruction permit:

You must have an adult with a driver's license for at least one year, seated beside you.
The use of any wireless communication device while driving is prohibited.

With a restricted minor’s permit:

You may drive between 6 a.m. and 10 p.m. with the authorization of a parent or legal guardian.
Between 10 p.m. and 6 a.m., you can drive only with a parent or legal guardian seated beside you or you can drive alone only for school/church events or work activities.
For the first 6 months, you cannot transport any passengers except siblings. After this period, you may only have one passenger who is not a family member.
The use of any wireless communication device while driving is prohibited.

The South Dakota instruction permit is valid for five years or until the expiration date of the documents authorizing your presence in the United States. Use this time to fulfill the necessary requirements before taking the road test.

In case you don't pass your DMV written test, you'll need to wait until the next working day before trying again. You have up to three attempts within a six-month period. However, if you fail three times within six months, you must pay a new fee to retake the exam.

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

CDL AIR BRAKES PRACTICE TEST - SOUTH DAKOTA

Frequently Asked Questions

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

2 How can you schedule the DMV test?

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

4 Is the DMV test only provided in English?

5 How can you prepare for the South Dakota DMV test?

6 What are the restrictions for new drivers in South Dakota?

7 How long is a South Dakota permit valid for?

8 What happens if you fail your DMV test?

SD CDL Air Brakes Test