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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. You should signal your intention to turn at least ____ before turning or changing lanes.
250 feet
75 feet
100 feet
50 feet
2. When driving at night you should:
always use low beams.
use your high beams when it is safe and legal to do so.
keep the interior light on.
All of the above.
3. When using a fire extinguisher, you should stay:
at whatever distance you think is safe.
as close to the fire as possible, without getting burnt.
at least 10 feet away from the fire.
as far away from the fire as possible.
4. If you go twice as fast, your stopping distance will increase by:
four times.
eight times.
two times.
ten times.
5. When should you turn the retarder off?
when your vehicle has a high center of gravity.
when the cargo is heavy.
when the road is slippery.
when the cargo is prone to shifting.
6. You can determine if your vehicle is equipped with ABS (anti-lock braking system) by:
checking for a yellow ABS malfunction lamp on the instrument panel.
looking for wheel speed sensor wires coming from the rear of your brakes.
checking if your vehicle was manufactured after March 1, 1998.
All of the above.
7. While driving, you should use your mirrors to:
check the condition of the tires and cargo.
check where the rear of your vehicle is while you make turns.
know where other vehicles are around you.
All of the above.
8. During your pre-trip inspection, you should check:
Warning flashers.
Tire tread depth.
Windshield wipers.
All of the above.
9. Your vehicle must be equipped with:
Fire extinguisher(s)
Spare electrical fuses
Warning devices for parked vehicles
All of the above.
10. If your vehicle gets stuck on the railroad tracks, you should:
gather up your paperwork and shipping papers while calling 911, then get out of the vehicle.
check for identifiable landmarks to give the location of the crossing.
get out of your vehicle and away from the tracks.
All of the above.
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SD CDL Knowledge Test

Number of questions: 50
Correct answers to pass:40
Passing score:80%
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