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 Louisiana Commercial Driver License Manual. Questions come from chapters covering: Introduction, Driving 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. If there is ice on the front of your side mirror:

You should exit the roadway.

You can expect ice to be on the roadway.

There will not be ice on the roadway.

If your mirrors or wiper blades become icy while you are driving, you can expect the road surface to be icy as well.

2. If the low air pressure warning signal comes on, you should:

Continue driving, but have the brakes repaired within a week.

Pull over and inspect the brakes.

Phone a mechanic while driving.

If the low air pressure warning signal comes on while you are driving a vehicle with air brakes, you should immediately bring the vehicle to a safe stop while you are still able to control the brakes. Inspect and repair the brakes as soon as possible.

3. If you have an engine fire, you should:

Open the hood as soon as possible.

Turn off the engine as soon as possible.

Not use a fire extinguisher.

To keep an engine fire from spreading, you should turn off the vehicle's engine as soon as possible. Do not open the hood if you don't have to.

4. What color malfunction lamps do vehicles equipped with ABS have?

Green

Yellow

Blue

Anti-Lock Braking System (ABS) malfunction lamps are usually yellow. Even if the ABS isn't working properly, a driver will still have access to the vehicle's usual braking functions.

5. If you are being tailgated while driving a large vehicle, do all of the following, except:

Reduce your speed gradually.

Increase your following distance.

Increase your speed.

If you find yourself being tailgated by another driver, you should increase your following distance and avoid making quick moves. Increasing your speed may only result in the other driver continuing to tailgate you at a higher speed. Do not turn on your taillights or flash your brake lights at the other driver.

6. If a driver has stopped on the road and is placing triangles to warn other motorists:

The triangles should be held between the driver and oncoming traffic.

The triangles should be carried behind the driver's back to prevent them from being seen by other drivers until they are placed.

The triangles should be held as low as possible.

For your own safety, when placing reflective warning triangles, you should carry them between your body and the oncoming traffic.

7. 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.

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