There are two air brake systems in a dual air brake system. The systems share a set of brake controls, but each system has its own tanks, hoses, and lines.

Each system has its own air tanks.

Air tanks are shared between both systems.

Each system has its own air tanks.

You must designate which system you are using.

An air compressor governor will stop the compressor from pumping air once the air tanks are at an air pressure level around 125 psi. This air pressure level is referred to as the "cut-out" level.

Stop the compressor from pumping air.

Begin pumping air into the tanks.

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).

Some older vehicles have front brake limiting valves with "normal" and "slippery" settings. Setting a brake limiting valve to "slippery" reduces the vehicle's stopping power, so a driver should make sure the valve is in its "normal" position. Front wheel braking has proven to be effective in all driving conditions.

Set the control to the off position.

Set the control to the neutral position.

Air Brakes Endorsement Test | Oklahoma 2024 #2 Page 2 of 4

Train for FREE online with our Oklahoma 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 OK Class A/Class B driver license in 2024, 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 | Oklahoma 2024 #2 Page 2 of 4

7 . During a static leakage test, what is the maximum leakage rate that is safe for a double combination vehicle?

8 . In a dual air brake system:

9 . Once the air tanks are at an air pressure level of 125 psi, the air compressor governor will:

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

11 . To ensure normal stopping power, drivers of vehicles equipped with a front brake limiting valve should:

12 . During an applied leakage test, the maximum leakage rate for a double combination vehicle is ____ in a minute.

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