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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. If you feel drowsy, you should _______ before driving.
listen to upbeat music
drink coffee
2. Which of the following is NOT one of the four a basic skills needed to operate a commercial vehicle?
Ability to steer
Ability to back the vehicle safely
Ability to accelerate
Ability to multitask while driving
3. To make an emergency using the stab braking method, you should:
fully apply the brakes until the wheels lock up, then stay off the brake until the vehicle has slowed down.
apply firm pressure to the brake pedal and hold for 6 seconds, then pump the pedal three times.
apply your brakes all the way, release the brakes when the wheels lock up, and apply the brakes again as soon as the wheels start rolling.
apply the brakes as hard as you can without locking the wheels.
4. When driving a 60 foot truck at 35 mph in ideal conditions, you should keep at least _______ of space in front of you.
4 seconds
5 seconds
6 seconds
12 seconds
5. Which of the following should you check for looseness, damage, sticking or improper settings?
Steering wheel
Transmission controls
Brake controls
All of the above.
6. Rollovers happen when drivers:
brake too hard.
stop too often.
turn too fast.
turn too slowly.
7. Air tank drains:
protect the tanks and the rest of the system from too much pressure.
are used to remove water and oil from the air tanks.
are used to move air to the brakes.
should not be used in wet weather.
8. When is use of a drug given to a driver by a doctor permitted?
Only if it's an over the counter drug.
Only if it's a prescription drug.
Only if the doctor informs the driver that the drug won't affect safe driving ability.
9. When meeting an oncoming vehicle at night, if the other driver does not put their low beams on, you should:
look slightly to the right to avoid looking directly at the lights of the oncoming vehicle.
"get back at the other driver" by putting your own high beams on.
flash your high beams at the other driver.
slow down and look straight ahead in your lane.
10. If you must stop on a one-way or divided highway, you should place warning devices _______ toward the approaching traffic.
10, 100 and 200 feet
3, 15 and 45 feet
5, 25 and 50 feet
5, 50 and 500 feet
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SD CDL Practice Test

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