FREE CDL Air Brake Anti-lock Braking Systems Questions and Answers

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What is the primary purpose of ABS on a vehicle?

Correct! Wrong!

ABS helps maintain steering control by preventing wheels from locking up during hard braking, especially on slippery surfaces. However, ABS does not necessarily reduce stopping distance.

When driving a vehicle equipped with ABS, how should you apply the brakes in an emergency?

Correct! Wrong!

With ABS, you should apply and hold firm pressure on the brake pedal. ABS automatically prevents the wheels from locking, allowing you to maintain control without pumping the brakes.

What should you do if the ABS warning light stays on after you start your vehicle?

Correct! Wrong!

If the ABS warning light stays on, it indicates a problem with the ABS system. Your regular brakes will still function, but you won’t have the added control ABS provides during hard braking.

On which vehicles is ABS required by law?

Correct! Wrong!

The law requires ABS on trucks, buses, and trailers built after specific dates: March 1, 1997, for trucks and buses, and March 1, 1998, for trailers. Older vehicles may not have ABS unless retrofitted.

How does ABS help in an emergency stop on icy or wet roads?

Correct! Wrong!

ABS prevents wheel lock-up, helping you maintain steering control during an emergency stop. While it may not shorten stopping distance, it reduces the risk of losing control on slippery roads.

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