Once you have begun to drive after a tire has been changed, you should stop after a short distance to recheck the tightness of the lug nuts.

Recheck the tightness of the lug nuts.

See if rocks have gotten into the tread.

In an air brake system, a low air pressure warning signal must come on if air pressure in the tanks falls below 60 psi. This warning signal may come in the form of a light, a buzzer, or a wig wag.

When tank pressure falls below 60 psi.

When tank pressure falls below 120 psi.

When tank pressure falls below 60 psi.

When tank pressure falls below 10 psi.

When tank pressure falls below 5 psi.

Height warnings are often, but not always, posted on low bridges. If you are unsure if you will be able to clear an overhead object, go slowly.

Height warnings may be posted, but do not have to be.

Height warnings must always be posted.

Height warnings must be posted at least twice.

Height warnings may be posted, but do not have to be.

Traction is friction between your tires and the surface of the road. Adequate traction is necessary for braking and steering.

Friction between the tires and road

The length of time needed to activate the brakes

Front-end header boards, also known as "headache racks," protect the driver from cargo moving in the event of a crash or emergency stop.

Help protect the driver from the cargo.

Allow for increased cargo space.

Class B Driving Test | Arizona 2025 #2 Page 4 of 7

Train for FREE online with our Arizona 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 AZ 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 | Arizona 2025 #2 Page 4 of 7

22 . After a tire has been changed, the driver should stop after a short distance of driving to:

23 . If your vehicle has air brakes, you must have ____ endorsement to operate the vehicle.

24 . A low air pressure warning signal should activate:

25 . The leading factor resulting in death and injury in work zones is:

26 . On low bridges:

27 . What is traction?

28 . Headache racks:

See the exact questions that will be on the 2025 DMV exam.

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