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 Minnesota Commercial Driver’s 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. Cargo inside a trailer:

Explanation
Cargo must be properly secured to prevent it from moving in transit. Loose cargo can be dangerous to the driver operating the CMV, as well as to other road users.

2. When driving in fog, you should:

Explanation
If you must drive in fog, you should use your low beam headlights and fog lights, even during the day.

3. When stopping, you should:

Explanation
When stopping, press down the brake pedal smoothly and gradually.

4. An applicant will be denied a hazardous materials endorsement if they:

Explanation
Your application for a hazardous materials endorsement can be denied, or your existing endorsement canceled, if you do not have legal permanent status in the United States; you renounce U.S. citizenship; you are wanted for, under indictment for, or convicted of certain felonies; you are judged mentally incompetent or are involuntarily committed to a mental institution; or you are deemed by the Transportation Security Administration to pose a security threat.

5. Which of the following is a sign of a potentially drunk driver?

Explanation
Warning signs that a driver may be impaired include that they are having trouble staying in their lane, they are having trouble maintaining an appropriate driving speed, or they are stopping without a clear reason.

6. When driving a truck requiring a CDL:

Explanation
You must be properly restrained by a safety belt at all times when driving a commercial motor vehicle.

7. What helps prevent wheel lockup when braking?

Explanation
The purpose of an Anti-Lock Braking System (ABS) is to prevent wheel lockup while brakes are being applied.
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