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

1. If you must drive very slowly, you should:

Explanation
If you must drive slowly, you should warn drivers behind you by turning on your emergency flashers, as long as local law permits their use.

2. The two indicators that determine when you should upshift are:

Explanation
There are two indicators that determine when you need to shift into a higher gear. One indicator is the engine speed (rpm). You should read your vehicle's manual to learn its rpm range and shift up when you reach the top of that range. The other indicator is road speed (mph). You should learn which speeds each gear can accommodate, then keep an eye on the speedometer and shift up as needed.

3. When coming to a stop, you should apply the brake pedal by:

Explanation
When stopping, you should push the brake pedal down gradually. Braking gradually will help you to maintain proper control of your vehicle.

4. 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.

5. How does doubling your speed from 20 mph to 40 mph affect your vehicle's braking distance?

Explanation
Increasing your vehicle's speed will increase your vehicle's striking power and braking distance. Doubling your vehicle's speed from 20 to 40 mph will multiply its braking distance by four.

6. When doing an inspection, ensure that the brake pads are:

Explanation
When inspecting a vehicle's brakes, you should make sure the shoes and pads do not have oil, grease, or brake fluid on them.

7. During the skills test, if making a turn that requires a stop, you should:

Explanation
If you must come to a stop before making a turn during the driving skills test, you should come to a smooth stop behind any stop line, crosswalk, or stop sign. Keep your front wheels aimed straight ahead and do not let your vehicle roll. If stopping behind another vehicle, stop where you are still able to see the rear tires of the vehicle ahead of you.
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