Instructions
Air Brakes #1

FREE Air Brakes Endorsement Test Online | Washington 2022

Train for FREE online with our Washington 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 WA Class A/Class B driver license in 2021, practice as much as.. Read More

Train for FREE online with our Washington 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 WA Class A/Class B driver license in 2021, 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.

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1 . What helps prevent wheel lockup when braking?

The purpose of an Anti-Lock Braking System (ABS) is to prevent wheel lockup while brakes are being applied.

2 . Lights that indicate that anti-lock brakes are not working are:

Vehicles equipped with Anti-Lock Braking Systems (ABS) have yellow malfunction lights to indicate issues in the braking system.

3 . In a vehicle with dual air brakes, a leak in one system ____ the second system.

A dual air brake system is made up of two separate air brake systems. If there is an air leak in one system, it may not affect the other.

4 . In a dual air brake system:

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.

5 . What is brake lag?

Because air takes time to flow through the air lines to the brakes, air brakes cannot begin working instantly. There is often a brake lag of at least one-half of a second between the moment the brake pedal is pressed and the moment the brakes begin to work.

6 . If the safety relief valve in an air brake system is releasing air:

The safety relief valve in an air brake system releases air if necessary to prevent pressure in the system from becoming too high. If the valve starts releasing air, there is something wrong. Have a mechanic fix the problem.

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