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Louisiana CDL Permit Test - Knowledge Test Class B

Number of questions: 50
Passing score: 40
Directions: 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.
You have made error so far
Passing grade —
10 or fewer errors

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 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.

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.

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.

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.

What color malfunction lamps do vehicles equipped with ABS have?


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.
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