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The CDL general knowledge test is required to be taken by all CDL applicants. The Ohio 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 Ohio 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 OH 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. Backing is dangerous because:
you cannot see everything behind your vehicle.
cargo may fall out.
you have to turn the steering wheel toward the direction you want to go.
2. If you must drive slowly, how should you alert following drivers?
Turn on your taillights
Flash your brake lights
Use your emergency flashers if it is legal
3. When looking ahead of your vehicle while you are driving, you should:
look as far as your peripheral vision can see.
shift your attentionĀ back and forth, near and far.
look to the left side of the road.
4. In a convex mirror everything appears:
5. During a pre-trip inspection, to check your lights you should:
with the engine running, put the vehicle in a forward gear and turn on the headlights.
check the yellow malfunction lamps on the instrument panel.
turn off the engine, turn on the headlights and 4-way emergency flashers, and get out of the vehicle.
6. When checking the steering system during your pre-trip inspection you should look for:
mismatched lock rings.
steering wheel play of more than 10 degrees.
cracked drums.
7. While driving, you should use your mirrors to:
check where the rear of your vehicle is while you make turns.
know where other vehicles are around you.
All of the above.
8. The tire load for each tire is stated:
on the side of the tire.
on the tread of the tire.
on the inside of the tire.
9. After beginning a trip, you should inspect your cargo:
within the first 50 miles.
during your first rest stop.
within the first 100 miles.
10. Why should you check your mirrors regularly to know where other vehicles are around you?
To flash the brake lights if you are being tailgated.
To move out of their way if they want to get past.
To know whether you can make a quick lane change in an emergency.
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OH CDL Practice Test

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