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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. When you see a hazard that will require slowing down, you should:
immediately come to a compolete stop.
warn the drivers behind by flashing your brake lights.
alert the drivers behind by pointing and sounding your horn.
2. Hanging meat in a refrigerated truck:
will not affect safe driving ability.
can be a very unstable load.
should never be transported.
3. Placards are used to:
indicate the maximum speed that the vehicle can reach on a level road.
identify the hazard class of the cargo.
indicate the maximum speed that the vehicle can travel.
4. Which of the following statements about driving in hot weather is true?
If a tire is too hot to touch, you should hose it down with water.
Spots where tar "bleeds" to the surface provide better traction.
You should check the tire mounting and air pressure before driving.
5. ABS:
helps you avoid wheel lock up.
allows the wheels to lock up.
makes it easier to break.
6. If you are driving toward a traffic light that's been green for a long time, you should:
brake as quickly as possible.
start slowing down and be ready to stop.
increase your speed to get through the intersection before the traffic light changes to red.
7. Most heavy trucks with manual transmissions require ____ to change gears.
single clutching
double clutching
triple clutching
8. When approaching a traffic light that has been green for a long time, you should:
maintain your current speed.
speed up to get through the light.
start slowing down and be ready to stop.
9. Having ABS on only the trailer:
still gives you more control over your vehicle during braking.
makes the trailer more likely to swing out.
is very dangerous.
10. In an emergency, if you have to drive off the road you should:
avoid using the brakes until your speed has dropped.
keep one set of wheels on the pavement, if possible.
All of the above.
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OH CDL Knowledge Test

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