Instructions

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 driver). To receive this license, applicants must pass a 50-question test. To pass, applicants must answer 40 questions correctly. Each question has three or four possible answer choices. Test questions come from the North 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 50

Passing Score 40

8. Cargo with a high center of gravity:

Can make a vehicle likely to tip over.

Is encouraged in inclement weather.

Is required on some roads.

Cargo with a high center of gravity makes a vehicle more likely to tip over than cargo with a low center of gravity. For this reason, it is important that the weight of cargo be distributed as low as possible.

9. When traveling down a hill:

Your speed will not change.

Your speed will decrease.

Your speed will increase.

You will slow to a stop.

When a vehicle is traveling on a downward slope, the force of gravity will cause its speed to increase.

10. When you leave your vehicle, you should:

Apply the parking brake.

Apply the air brake.

Not apply any brake.

Leave the door open.

Always apply the parking brake when leaving your vehicle.

11. What kind of force must emergency brakes use?

Air pressure

Mechanical

Heavy

Electrical

Because air pressure can eventually leak away, the emergency brakes in an air brake system must be held on by mechanical force.

12. Federal and state laws require:

Drivers to regularly inspect their vehicles.

Drivers to inspect their vehicles, but only if they believe there may be a problem.

Drivers to inspect their vehicles if planning to travel out-of-state.

Drivers to inspect their vehicles, but only if they will be transporting hazardous materials.

Commercial drivers are required by federal and state laws to inspect their vehicles before every trip. Regular inspections can help drivers identify issues before they become dangerous and costly.

13. A CMV should:

Not have a fire extinguisher, unless transporting hazardous materials.

Not have a fire extinguisher, unless the vehicle will be traveling through remote areas.

Not have a fire extinguisher.

Have a fire extinguisher and other emergency equipment.

All commercial motor vehicles are required to be equipped with the proper emergency equipment. This may include spare electrical fuses; three red reflective triangles, six fuses, or three liquid burning flares; and at least one properly charged and rated fire extinguisher.