When approaching your vehicle for an inspection, you should look underneath the vehicle for fresh leaks of oil, coolant, grease, or fuel. Seeing a fresh puddle of any of these fluids could indicate a safety issue with your vehicle.

A puddle of oil under the vehicle

Lane changes should always be executed slowly and smoothly. This will result in safer handling of your vehicle while allowing time for other drivers to react to your movements.

You should change lanes slowly and smoothly.

Other vehicles will likely get out of your way.

You should change lanes slowly and smoothly.

You should wait to change lanes until you are in an intersection.

On a wet road, it is possible for a vehicle's tires to lose traction with the road surface and begin to glide along on the layer of water. This is referred to as hydroplaning. Hydroplaning can occur at speeds as low as 30 mph.

The tires lose contact with the road.

The trailer disengages from the tractor.

The vehicle becomes easier to control.

If the low air pressure warning signal comes on while you are operating a vehicle with air brakes, you should stop and safely park the vehicle as soon as possible. It is essential that you are able to stop safely while you still have some braking power remaining.

Test the brakes while driving, but continue driving if nothing seems wrong.

Drive with the hazard lights activated.

Class B Driving Test | Louisiana 2025 #1 Page 6 of 7

Train for FREE online with our Louisiana class B license test. The official exam test consists of several obligatory parts, with all of them checking your knowledge of different blocks of road rules. If you need to obtain a LA CDL class B permit in 2025, practice as much as possible. Free sample tests published on our website will help you check and improve your knowledge and boost your grades. Please bear in mind that CDL class B requirements may vary from state to state.

Number of Question 50

Passing Score 40

Number of Tests 20

Class B Driving Test | Louisiana 2025 #1 Page 6 of 7

36 . When approaching your vehicle as part of your pre-trip inspection, you should look for what as a sign of trouble?

37 . During a pre-trip inspection, belts should be:

38 . When checking windshield wiper blades, they should be:

39 . When you need to change lanes:

40 . What happens when a vehicle hydroplanes?

41 . When starting your vehicle, the coolant temperature should:

42 . If the low air pressure warning signal comes on in a vehicle with air brakes, the driver should:

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