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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. Which of the following is true about lanes changes?
When changing lanes you should check your mirros as usual.
You should not check yourmirrors before you change lanes.
Lane changes should always be avoided.
Lane changes require more than regular mirror checks.
2. Your vehicle has automatic transmission. When going down grades, you should:
select a high range to get greater engine braking.
select a low range to get greater engine braking.
put the gearshift in "Park".
select a high range to reduce engine braking.
3. A red triangle with an orange center means:
Law enforcement vehicle
Slow-moving vehicle
The vehicle is hauling hazardous materials
Liquid tanker
4. Which of the following is NOT a warning sign of fatigue?
Difficulty focusing
Rubbing eyes
Adjust your speed depending on driving conditions
Missing exits
5. When crossing railroad tracks, you should:
shift gears while crossing the tracks.
put the transmission in Neutral.
not stop.
try to pass slower vehicles.
6. If you are driving toward a traffic light that's been green for a long time, you should:
brake as quickly as possible.
increase your speed to get through the intersection before the traffic light changes to red.
start slowing down and be ready to stop.
maintain your current speed.
7. Which of the following statements about drivers fixing an engine or changing a tire is true?
They must park within 5 feet of the roadway.
They often do not pay attention to roadway traffic.
They usually pay attention to the danger roadway traffic is to them.
Roadway traffic is not a danger to them.
8. Fully loaded rigs:
are much more likely to roll over than empty rigs.
are less likely to roll over than empty rigs.
are just as likely to roll over as empty rigs.
None of the above.
9. After drinking, which of the following can help you sober up?
Drinking black coffee. The caffeine will eliminate the effects of alcohol.
Taking a cold shower after drinking.
Taking a cold shower.
None of the above.
10. If you hear a loud loud "bang" and the steering feels "heavy", you should:
check your rearview mirrors to see if you have a flat tire.
hold the steering wheel firmly and stay off the brake.
pump the brakes until the vehicle has slowed down.
brake hard and pull off the road.
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CDL Knowledge Test SD

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