Instructions

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 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 Kentucky 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 50

Passing Score 40

1. Water that has collected on a roadway can cause:

Hydroplaning.

Acceleration.

Stopping.

The risk of hydroplaning begins when water has collected on the surface of a road.

2. If you notice anything affecting the safety or mechanical functioning of your CMV while driving, you should:

Stay quiet and see if the problem goes away.

Make a written report that includes your concerns.

Try to fix it yourself.

At the end of each day of driving, you may be required to make a written report on the vehicle or vehicles driven. Be sure to make note of any issues that could affect the safety of the vehicle or that could lead to a mechanical breakdown.

3. While driving, gauges are:

Unreliable.

Unpredictable.

To be monitored for potential signs of trouble.

While driving, you should watch your vehicle's gauges for signs of trouble. Be sure to inspect your gauges before beginning a trip to ensure that they are in proper working order.

4. During the vehicle inspection test, you will be asked to:

Change a tire.

Explain to the examiner what you are inspecting and why.

Estimate the weight of a load on a trailer.

During the vehicle inspection test, you will be asked to do a complete inspection of your vehicle. You will need to explain what you are inspecting and why.

5. What is the Gross Vehicle Weight Rating (GVWR)?

The weight stated by the manufacturer as the loaded weight of a single vehicle

The maximum weight that can be pulled by a vehicle

The minimum weight that can be hauled by a vehicle

A Gross Vehicle Weight Rating (GVWR) is the value specified by the manufacturer as the loaded weight of a single vehicle.

6. Air tank drains:

Should not be used in cold weather.

Are helpful to remove water and oil from the air tanks.

Are used to move air to the brakes.

Compressed air in an air brake system usually has a certain amount of water and oil in it. This can harm the system if allowed to accumulate. Air tanks have drain valves to aid in removing water and oil from the compressed air.

7. If your brakes fail while you are traveling downhill and there is no available escape ramp, you should:

Keep pumping the brakes.

Turn the vehicle off.

Drive into an open field.

If your brakes fail while you are driving downhill, you should first look for an escape ramp to stop your vehicle. If no ramp is available, you should look for an alternative place to bring your vehicle to a stop, such as an open field or side road that flattens out or turns uphill.

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