Truck tractors with air brakes built on or after March 1, 1997, and other vehicles with air brakes built on or after March 1, 1998, must be equipped with anti-lock brakes.

An Anti-Lock Braking System (ABS).

Using the brakes excessively will cause them to overheat, making them less effective. This is referred to as "fading."

Brakes are not used often enough.

In an air brake system, the air compressor pumps air into the air storage tanks. The air compressor is controlled by the air compressor governor.

It pumps air into the air storage tanks.

It moves air to the back of the truck.

In a dual air brake system, either the front or rear brakes will not be fully operable if one of the air systems gets too low on pressure. If the air pressure in either tank gets too low while you are driving, you should exit the road and park as soon as possible.

Either the front or rear brakes will not be fully operable.

None of the brakes will work at all.

Either the front or rear brakes will not be fully operable.

There is usually no noticeable effect.

Air Brakes Endorsement Test | Montana 2025 #1 Page 2 of 4

Train for FREE online with our Montana CDL air brake 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 MT Class A/Class B driver license 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 the requirements for CDL may vary from state to state.

Number of Question 25

Passing Score 20

Number of Tests 20

Air Brakes Endorsement Test | Montana 2025 #1 Page 2 of 4

7 . Truck tractors with air brakes built on or after March 1, 1997 must have:

8 . Brake fading is caused when:

9 . The ____ between an air compressor and reservoir tank prevents air from escaping if the air compressor has a leak.

10 . What does an air compressor do in an air brake system?

11 . In a dual air brake system, if one air system is very low on pressure:

12 . What tells you how much pressure is in your vehicle's air tanks?

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

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