South Dakota CDL Class A, B or C DMV Practice Tests & Cheat Sheets

CDL Class A, B or C. Complete CDL driver training course. All the questions in this test are from the official DMV written exam. You can use our free online tests to evaluate how likely you are to pass the official DMV test. Or you can just cut to the chase and increase your chances of passing by upgrading to Premium Membership and unlock official DMV tests. In addition, you will also receive a master cheat sheet which contains all your state’s DMV questions and answers. Premium membership also unlocks a smart tracker which keeps an inventory of all incorrectly answered questions for easy, fast and effective revision. Practice with our free tests or hit Upgrade button below for premium access and increase your chances of passing your DMV written exam.

99.5% Pass Rate

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Quick Facts:

Number of Questions – 20

Passing Percentage – 80%

Test Type – Free Test

Because the air gets old and needs to be replaced
Because compressed air contains some water which must be drained from the tanks
To allow for a change in air pressure
To remove bad air from the tanks

Two to three
Five to six
12 to 15
30 to 45

Develop plans to get out of any dangerous situation that could arise.
Enjoy the scenery.
Never look at the mirrors.
Focus on your own driving and not worry about other drivers.

South Dakota DMV CDL General Knowledge Quick Practice Test 4

South Dakota DMV CDL General Knowledge Quick Practice Test 4 For 2026

99.5% Pass Rate

Eight feet.
10 feet.
14 feet.

An Anti-Lock Braking System (ABS)
Air brakes
An alternator

Make items stand taller in a trailer.
Prevent items from moving in a trailer.
Make it easier to unload items from a trailer.

34 feet
53 feet
61 feet