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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 driving on wet roads, you should reduce your speed by about:
2. When crossing railroad tracks, you should:
shift gears while crossing the tracks.
not stop.
try to pass slower vehicles.
3. Vehicles must be equipped with emergency equipment, including:
circuit breakers
warning devices for parked vehicles
first-aid kit
4. When parked on the side of the road, you should:
use the 4-way emergency flashers.
flash your brake lights.
turn off all lights.
5. An item that is 15 feet long placed on a flatbed trailer should have at least:
3 tie-downs.
2 tie-downs.
1 tie-down.
6. ABS malfunction lamps are located:
on the instrument panel.
under the hood.
on the driver'door.
7. In the event of brake failure you should NOT:
use the parking brake.
shift up.
pump the brakes.
8. The earliest way to recognize that your trailer has started to skid is:
by checking your mirrors.
by checking the jackknife sensor.
by releasing the brakes.
9. When driving in hot weather:
the engine oil helps keep the engine cool, as well as lubricate it.
the the tires' air pressure will decrease.
antifreeze should be avoided.
10. When using a turn signal, which of the following is NOT true?
You should turn off your turn signal after you've turned.
You should signal early.
You should cancel the signal before completing the turn.
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OK CDL Practice Test

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