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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. Why should you be in the proper gear before starting down a hill?
changing gears on a hill is illegal.
it will help you go faster when you reach the bottom of the hill.
gravity can cause the speed of your vehicle to increase.
2. When making a turn you should:
make gestures to get the attention of other drivers.
signal early.
honk your horn.
3. When driving through a large puddle or flowing water, you should:
increase engine rpm.
slow down.
All of the above.
4. Warnings on low bridges or underpasses:
are always posted.
are often posted, but sometimes they are not.
must be posted.
5. HAZMAT placards are:
regulatory signs
speed signs
warning signs
6. Which of the following is not a reason for covering cargo?
To protect the cargo from weather
To protect people from spilled cargo
To prevent other drivers from looking at the cargo
7. When checking the engine compartment in a vehicle inspection, you should check all of the following except:
Engine oil level
Shock absorbers
Windshield washer fluid level
8. While crossing railroad tracks, you should:
shift up.
shift down.
not shift gears.
9. You should hold your steering wheel:
firmly with one hand.
with both hands on the same side of the wheel.
firmly with both hands.
10. You are driving on a two-lane road. If an oncoming driver has drifted into your lane:
a move to your left is best.
you should brake as hard as you can.
a move to your right is best.
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OH CDL Practice Test

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