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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. To maintain alertness while driving, you should:
protect yourself from glare with sunglasses.
keep the cab warm.
rely on caffeine.
2. You should review the pre-trip inspection report from the last driver:
once a week.
during your pre-trip inspection.
after each trip.
3. Before transporting a sealed load, make sure:
that you don't exceed gross weight and axle weight limits.
that there is a picture of its contents.
that the load can be inspected.
4. When driving in very hot weather, you may have to:
decrease your following distance.
increase your speed until the tires cool off.
reduce your speed to prevent overheating.
5. Dollies with ABS are required to have a malfunction lamp:
on the right side.
on the rear.
on the left side.
6. ______ must report accidents and incidents involving hazardous materials to the proper government agency.
The carrier
The driver
The shipper
7. When driving, you should check your mirrors:
only when there may be a problem.
every 10 seconds.
8. Skids caused by acceleration can usually be stopped by:
applying the brakes firmly.
swerving to the right.
taking your foot off the accelerator.
9. Blood Alcohol Concentration (BAC) is determined by:
how frequently you drink.
the amount of alcohol you drink.
the type of alcohol you drink.
10. You should schedule trips for:
any time that fits your schedule.
the middle of the day.
the hours you are normally awake.
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OH CDL Knowledge Test

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