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. Be sure you are always driving so your vehicle can stop:

Explanation
Always be sure that you are driving in a manner that will allow your vehicle to come to a complete stop, if necessary, within the area of the road ahead that you are able to see.

9. During a walk-around inspection, ensure there are no cracks on the brake drums that are more than ____ of the width of the friction area.

Explanation
Before beginning a trip, it is important to check the brake drums during your walk-around inspection. It is unsafe to drive if any brake drum has a crack more than one half of the width of the friction area.

10. Which of the following is not a potential effect of drinking alcohol then driving?

Explanation
Driving errors that may be caused by alcohol-induced impairment include straddling lanes; quick, jerky starts; failure to signal or use lights; running stop signs and red lights; and improper passing. A driver's reaction time will become poor when they are under the influence of alcohol.

11. If feeling tired while driving, it is best to:

Explanation
If you begin to feel tired while driving, the only safe action to take is to stop and get some sleep. Trying to fight the fatigue and press on is very dangerous and can result in a fatal crash. You should not rely on artificial stimulants; these may help keep you awake a while longer, but they won't make you more alert.

12. Rough acceleration:

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

13. Applicants seeking a hazardous materials endorsement must pass a threat assessment through which agency?

Explanation
Applicants seeking a hazardous materials endorsement must undergo a threat assessment conducted by the Transportation Security Administration (TSA).

14. One way to overcome the challenges of blind spots is to:

Explanation
You should make frequent mirror checks to monitor the traffic around you. This should help you notice if surrounding vehicles begin to move into your blind spots.
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