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 possible answer choices. Test questions come from the Missouri Commercial 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. The tire load:

Explanation
Tire load is the maximum weight a tire can safely carry at a given pressure. This rating is stated on the side of each tire.

2. When slowing down, you should ____ to warn other drivers

Explanation
Before slowing down, it can be a good idea to lightly tap your brakes. This will cause your brake lights to flash, providing a warning to motorists behind you.

3. Which gas would cause concern due to a faulty exhaust system?

Explanation
A leaking exhaust system can introduce carbon monoxide, which is poisonous, into the cab or sleeper berth.

4. When passing another vehicle, you should:

Explanation
Whenever you pass another driver, bicyclist, or pedestrian, you should assume as a precaution that they do not see you.

5. What is road rage?

Explanation
Aggressive driving is defined as operating a motor vehicle in a selfish, bold, or pushy manner. Road rage is defined as operating a motor vehicle with the intent of doing harm to others, or the intent of physically assaulting another driver or their vehicle.

6. 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 quadruple its braking distance.

7. Your CDL will be revoked if:

Explanation
If your privilege to operate your personal vehicle is revoked, canceled, or suspended due to moving traffic violations, you will also lose your CDL. This does not apply if your license is revoked due to parking violations.
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