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The CDL general knowledge test is required to be taken by all CDL applicants. The Oklahoma 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 Oklahoma 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 OK 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. Perception Distance + Reaction Distance + Brake Lag Distance + Braking Distance = ?
Total Air Pressure
Stopping Distance - (minus) Brake Fade Distance
Total Stopping Distance
2. Which of the following statements about engine overheating is true?
You should never remove the radiator cap or any part of the pressurized system until the system has cooled.
Low speeds create more heat for the engine.
You should never shut off an overheated engine until it cools.
3. When checking the lights before driving:
you should turn off the engine.
you should check them from inside the vehicle.
make sure the parking brake is not set.
4. Regrooved tires:
cannot be used on the front wheels of buses.
cannot be used on the rear wheels of buses.
cannot be used on the wheels of buses.
5. When checking the steering system for defects, you should look for:
bent, loose, or broken parts, such as tie rods.
cut or cracked valve stems.
missing or broken leaves in any leaf spring.
6. Retarders:
help slow a vehicle and reduce brake wear.
help prevent accidents by applying extra braking power to the non-drive wheels.
apply their braking power whenever you push on the accelerator.
7. Traction is:
friction between the tires and the road.
friction between the front and rear tires.
the distance your vehicle will travel while you are braking.
8. If you must stop on a one-way or divided highway, place your warning devices:
10 feet, 50 feet, and 150 feet toward the approaching traffic.
10 feet, 100 feet, and 200 feet toward the approaching traffic.
100 feet, 200 feet, and 300 feet toward the approaching traffic.
9. If the coolant container is not part of the pressurized system:
you should never remove the radiator cap or any part of the pressurized system until the system has cooled.
you should remove the container cap and wait until the system has cooled.
you can safely remove the cap and add coolant even when the engine is hot.
10. Which of the following statements about driving in areas with strong winds is true?
Wind can be a problem especially when you enter a tunnel.
You should drive alongside other vehicles to help break up the wind.
Strong winds make it difficult to stay in your lane.
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OK CDL Practice Test

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