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 Nevada Commercial Driver 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 driving under wet conditions, what does a lack of spray from other vehicles indicate?

Explanation
If the road appears to be wet but the wheels of other vehicles are no longer generating spray, ice has formed on the road. Drive with extra caution when operating on wet or icy roads.

2. When a vehicle is started:

Explanation
After starting a vehicle's engine, you should see the warning lights and buzzers go out right away. If they remain on, there is something wrong with your vehicle.

3. Radial and bias-ply tires:

Explanation
When inspecting your vehicle, ensure that radial and bias-ply tires are not being used together.

4. If a vehicle is equipped with power steering, you should inspect:

Explanation
When inspecting a vehicle with power steering, check the hoses, pumps, and fluid level. In particular, you should look for leaks in the hoses.

5. Overloading a vehicle with cargo can affect all of the following, except:

Explanation
Overloading can have negative effects on a vehicle's steering, braking and speed control.

6. What must be on an air tank in an air-braked vehicle?

Explanation
All air tanks on air-braked vehicles must have one-way check valves located between the air compressor and the first reservoir. This prevents air from flowing out in the event of a leak.

7. If approaching a railroad crossing while driving a placarded vehicle, you should always:

Explanation
If approaching a railroad crossing while driving a transit bus, school bus, or placarded vehicle, special procedures apply. Before crossing, stop your vehicle within 50 feet of, but not less than 15 feet from, the nearest rail. Activate your four-way flashers while crossing. Do not stop, change gears, or change lanes while any part of your vehicle is proceeding across the tracks.
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