Knowledge Test Class A

This license is required for driving any legal combination of vehicles, with a gross combination weight rating of 26,001 pounds or more, provided the GVWR of a trailer exceeds 10,000 pounds To receive this license, applicants must pass a 50-question.. Read More

This license is required for driving any legal combination of vehicles, with a gross combination weight rating of 26,001 pounds or more, provided the GVWR of a trailer exceeds 10,000 pounds To receive this license, applicants must pass a 50-question test. To pass, applicants must answer 40 questions correctly. Each question has two, three or four possible answer choices. Test questions come from the Nebraska Commercial Driver License Manual. Questions come from chapters covering: Introduction, Driving Safely, Transporting Cargo Safely, Air Brakes (if applicable), Combination, Doubles and Hazardous Materials. Endorsements that may be used with a Class A CDL are: Hazardous materials, Tank, Passenger, HazMat and Tank, Air Brakes and School bus.

Number of Question
Passing Score

1. When inspecting your vehicle, you should check for all of the following, except:

Explanation
During a pre-trip inspection, you should verify that the air pressure is neither too low nor too high in any of your tires.

2. Where is the safety relief valve usually located?

Explanation
An air brake system's safety relief valve is located in the tank that is first to receive air from the compressor.

3. When it is difficult to see, such as at dawn or dusk, what is the best way to make your vehicle more visible?

Explanation
In conditions of poor visibility (such as at dawn, at dusk, in rain, or in snow), you should turn on your low beam headlights to make your vehicle easier to see. Do not use your high beams when driving near other vehicles.

4. When using your mirrors, you should frequently look at your tires to:

Explanation
Check your tires regularly when looking in your mirrors. This helps ensure that you will notice a tire fire, if one should happen. Tire fires may occur when a tire is under-inflated, if dual tires are touching, or if the tires are otherwise overheated.

5. Rough acceleration:

Explanation
Always accelerate smoothly and gradually so that your vehicle does not jerk. Rough acceleration can cause mechanical damage.

6. If you must stop on the side of a one-way or divided highway, how far behind your vehicle should you place warning devices?

Explanation
If you must stop on or by a one-way or divided highway, you must place a warning device 10 feet, 100 feet, and 200 feet to the rear of your vehicle.

7. Improperly loaded cargo can:

Explanation
Improperly secured or loaded cargo can be very dangerous. For example, loose cargo could fall in the event of a sudden stop, potentially injuring or even killing the driver.
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