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 Mississippi Professional 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

8. What is a Gross Vehicle Weight Rating (GVWR)?

Explanation
Gross Vehicle Weight Rating (GVWR) is the value specified by the manufacturer as the loaded weight of a single vehicle.

9. Alcohol begins to affect the body:

Explanation
Alcohol consumption impairs muscle coordination, reaction time, depth perception, vision, judgement, and inhibition. For some people, signs of impairment may begin with the first drink of alcohol. It is safest to not operate any motor vehicle after consuming alcohol in any amount.

10. One way to prevent hydroplaning on wet road surfaces is to:

Explanation
When driving on a wet road surface, the risk of hydroplaning is increased if your tire pressure is too low or your tire tread is too worn. If you begin to hydroplane, release the accelerator and push in the clutch to slow down.

11. One way to avoid becoming an aggressive driver is to:

Explanation
To help avoid frustration, which can lead to aggressive driving behavior, you should begin a trip with realistic expectations about your travel time. Plan ahead to allow time for potential traffic delays. Other strategies to help prevent aggressive driving behavior include driving an appropriate speed and keeping a reasonable following distance; avoiding making gestures at other drivers; and keeping your hands on the steering wheel.

12. 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.

13. Placards should be used:

Explanation
Warning placards are required to be used any time a vehicle is carrying designated types and amounts of hazardous materials. A placarded vehicle must display placards on all four of its sides.

14. Which of the following is not a sign of bad brake drums or shoes?

Explanation
Potential problems to check for when inspecting brakes include cracked drums; shoes or pads with oil, grease, or brake fluid on them; and shoes that are missing, broken, or worn dangerously thin.
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