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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. When is it safe to remove the radiator cap?
Whenever coolant has to be added to the system.
When you can touch the radiator cap with your bare hand.
As soon as you've stopped, as long as the engine is not hot.
2. If you go twice as fast, your stopping distance will increase by:
four times.
eight times.
two times.
3. Suspension system defects include:
steering wheel play of more than 10 degrees.
rust around wheel nuts.
cracked or broken spring hangers.
4. Stopping distance can be affected by:
Perception Distance
All of the above.
5. When driving late at night, you should be particularly vigilant for:
police officers
fatigued drivers
6. When signaling what you intend to do, you should:
signal continuously.
cancel your signal after you have turned.
All of the above.
7. To apply the parking brakes:
push the parking brake control knob in.
place the parking brake control knob in Neutral.
pull the parking brake control knob out.
8. When using your turn signals, you should:
turn the signal off before you turn.
signal only if vehicles are behind you.
signal well before you turn.
9. Do NOT use water on a _______ fire.
10. Which of the following statements about over-the-counter drugs is true?
They are not considered drugs.
They can be used while on duty, as long as you drink coffee to stay awake.
They may affect safe driving ability.
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OK CDL Knowledge Test

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