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. Test questions come from the Ohio Commercial Driver’s 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

1. When it’s difficult to see, such as at dawn or dusk, a driver can increase their vehicle's visibility by:

Explanation
When driving at dawn, at dusk, or in inclement weather, you should use your headlights on their low beam setting to increase your visibility.

2. To obtain a hazardous materials endorsement, a person must be:

Explanation
To obtain a hazardous materials endorsement, you must be a U.S. citizen or lawful permanent resident. You will lose your hazardous materials endorsement if you renounce your U.S. citizenship.

3. Dual tires should:

Explanation
When inspecting a vehicle, you should verify that your dual tires do not come into contact with one another, or with any other part of the vehicle.

4. Compared to talking on a cell phone while driving, texting while driving is:

Explanation
Texting while driving is even more dangerous than speaking on a phone while driving. In addition to being mentally distracting, texting is also physically distracting.

5. If driving through flowing water or a large puddle, you should:

Explanation
It is best to avoid driving through large puddles or moving water. If there is no way to avoid driving through water, you should slow down, shift into a low gear, and gently apply the brakes. Pressing linings against the brake drums or discs will keep water, mud, silt, and sand from getting inside the brake mechanisms.

6. A distracted driver:

Explanation
Distracted drivers perceive hazards on the road more slowly than drivers who are focused, or they do not perceive hazards at all.

7. If there is a cargo fire in a box trailer:

Explanation
The doors of a trailer should be not be opened in the event of a cargo fire, especially if the cargo includes hazardous materials. Opening trailer doors would increase the fire's oxygen supply, potentially causing the fire to increase in size.
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