Knowledge Test Class B

This license is required for driving a single vehicle with a GVWR of more than 26,001 pounds, and a trailer not to exceed 10,000 pounds gross vehicle weight rating, or a vehicle designed to transport 24 or more people (including the.. Read More

This license is required for driving a single vehicle with a GVWR of more than 26,001 pounds, and a trailer not to exceed 10,000 pounds gross vehicle weight rating, or a vehicle designed to transport 24 or more people (including the driver). 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 South Carolina Commercial Driver License Manual. Questions come from chapters covering: Introduction, Driving Safely, Transporting Cargo Safely, Air Brakes (if applicable), Pre-Trip Vehicle Inspection Test, Basic Vehicle Control Skills Test and On-Road Driving.. Endorsements that may be used with a Class B CDL are: Hazardous materials, Tank, Passenger, HazMat and Tank, Air Brakes and School bus.

Number of Question
Passing Score

1. Backing with a trailer is dangerous because:

Explanation
Backing is always dangerous because it is impossible to see everything that is behind your vehicle. Only drive in reverse if it is absolutely necessary.

2. The parking brake should be:

Explanation
The parking brake should be applied every time you park your vehicle.

3. If you are driving in fog, you should not:

Explanation
If you must drive in fog, be sure to slow down. Turn on your flashers and low beam headlights.

4. You may be an aggressive driver if you:

Explanation
Avoid being an aggressive driver by being realistic about your travel time, making allowance for delays, maintaining reasonable following distances, and not making hand gestures that could anger another driver.

5. Rough acceleration:

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

6. How could you reduce your stress while driving?

Explanation
Being under stress can lead to aggressive driving, which is dangerous. Playing calming music can help you become more relaxed if you are feeling stressed while driving.

7. The driver of a commercial motor vehicle:

Explanation
It is prohibited for CMV drivers to use hand-held mobile phones while driving.
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