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 three or four possible answer choices. Test questions come from the Maryland 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

8. Before beginning to drive downhill, you should:

Explanation
To avoid overusing your brakes, you should always shift into a lower gear before starting down a hill.

9. Once stopped as part of the stop/start maneuver, you should:

Explanation
When parking as a part of the stop/start maneuver during the on-road driving skills test, you must apply the parking brake. The gears should be shifted into neutral or park. You must be parked parallel to the curb and should not be blocking any driveways or intersections.

10. When entering a foggy area, you should:

Explanation
Always slow down before entering a foggy area. Use low beam headlights, avoid passing others, and avoid stopping on the side of the roadway. It is safest to completely avoid driving under foggy conditions, if possible.

11. After a trailer starts to turn during backing, you should follow the trailer by:

Explanation
When backing a vehicle with a trailer, you must turn the steering wheel in the direction opposite of where you want to go. Once your trailer starts to turn, you should turn the steering wheel the other way to follow the trailer.

12. Without engine oil:

Explanation
It is critical that an engine have sufficient oil pressure. The engine can be destroyed rapidly if run without oil.

13. Backing with a trailer is dangerous because:

Explanation
Backing a truck is always dangerous because the driver may not be able to see everything behind them. CMV operators should avoid backing whenever possible.

14. During the driving test, when asked to make a lane change:

Explanation
When asked to make a lane change during the on-road driving test, you should make the proper traffic checks, use your turn signal, and smoothly change lanes when it is safe to do so.
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