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The CDL general knowledge test is required to be taken by all CDL applicants. The South Dakota CDL test consists of 50 questions. To pass, you must correctly answer at least 40 questions (80%). The general knowledge test covers the contents of the South Dakota CDL Manual. All CDL applicants (Class A, B and C) must study the following sections: Driving Safely, Transporting Cargo Safely, Air Brakes (if you plan to operate vehicles equipped with air brakes), Vehicle Inspection Test, Basic Control Skills Test, Road Test. In addition, the Class A CDL test will include questions based on the Combination Vehicles section. Take this CDL practice test now to prepare for the actual SD general knowledge test! To get your CDL, you must pass both the knowledge and skills tests. CDL knowledge tests include: General Knowledge, Passenger Transport, Air Brakes, Combination Vehicles, Hazardous Materials, Tanker Vehicles, Doubles/Triples, School Bus, Firefighter. Depending on what class of license (A, B or C) and endorsements you need, you must take one or more knowledge tests. A special endorsement is also required to drive certain types of vehicles. The following endorsements may be used with a Class A, B or C CDL: HazMat (H), Tank Vehicles (N), Tank Vehicles Transporting Hazardous Materials (X) and Passenger Transport (P). The School Bus endorsement (S) is only available for Class A or B CDL, and the Doubles/Triples endorsement (T) is only available for Class A driver's licenses.
1. When your drive wheels have poor traction, retarders:
will apply the spring brakes.
can cause your wheels to skid.
will help you regain traction.
will stop working.
2. If your drive wheels begin to spin, you should:
take your foot off the accelerator.
pump the brake pedal three times.
use the parking brake.
use the Anti-lock Braking System.
3. To maintain alertness while driving, you should:
protect yourself from glare with sunglasses.
rely on caffeine.
take periodic breaks – about every 250 miles.
keep the cab warm.
4. _______ is the act of operating a motor vehicle in a selfish, bold, or pushy manner, without regard for the rights or safety of others.
Aggressive driving
Distracted driving
Road rage
Defensive driving
5. When checking the steering system during your pre-trip inspection you should look for:
shoes or pads with oil or grease on them.
mismatched lock rings.
cracked drums.
steering wheel play of more than 10 degrees.
6. If you smell exhaust fumes in the cab, you should:
stop immediately.
wait for the next stop, then inspect your vehicle.
remember to conduct a post-trip inspection.
open the windows.
7. You should NOT use the parking brakes if:
the brakes are cold.
the brakes are very hot.
the brakes are too dry.
All of the above.
8. What is Gross Vehicle Weight Rating?
The total weight of a single vehicle, including its load
The total weight of a combination of vehicles excluding the load
The value specified by the manufacturer as the loaded weight of a single vehicle
The total weight of a combination of vehicles including the load
9. When loading cargo, keep the load:
on the side away from most traffic.
to the front.
balanced in the cargo area.
to the rear.
10. Water in the brakes can cause the brakes to:
be weak or apply unevenly.
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Number of questions: 50
Correct answers to pass:40
Passing score:80%
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