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 two, three or four possible answer choices. Test questions come from the Utah Commercial Driver License Handbook. 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. The faster you drive:

Explanation
The faster you are driving, the longer your stopping distance will become. Brake accordingly.

9. Cargo inside a trailer:

Explanation
Cargo needs to be secured appropriately to prevent it from moving in transit. Cargo should be arranged to keep the vehicle's center of gravity low and well-distributed.

10. If convicted of a traffic violation in your personal car:

Explanation
If you are convicted of any traffic violations while driving any vehicle, you must notify your employer within 30 days of the conviction. This rule excludes parking violations.

11. Roads are especially slippery when it first begins to rain because:

Explanation
Roads are particularly slippery when it first begins to rain. The water mixes with oil drippings on the road that have not yet washed away, creating a slippery and dangerous mixture.

12. The parking brake should be:

Explanation
The parking brake in a vehicle with air brakes should be used every time the vehicle is parked.

13. A broken exhaust system poses no threat to the driver.

Explanation
A broken exhaust system is extremely dangerous because it may introduce toxic fumes into the cab or sleeper berth.

14. Most heavy-duty vehicles use:

Explanation
Most heavy-duty vehicles use dual air brake systems. A dual system has two separate air brake systems with a single set of controls.
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