Which term refers to an electronic braking system that prevents wheels from locking by monitoring braking on each wheel?

• A. Anti-Lock Braking System (ABS)
• B. Acuity
• C. Airborne Pathogens
• D. Ampere

Answer: (A)

This item tests knowledge of an electronic braking system that prevents wheel lock by monitoring braking at each wheel. Anti-Lock Braking System uses wheel-speed sensors on every wheel and a control module to detect when a wheel is about to stop rotating while the vehicle is still moving. When lockup is detected, the system quickly reduces and then reapplies brake pressure to that wheel, allowing it to continue turning and the driver to maintain steering control. The rapid cycling helps prevent skidding, particularly on wet or slippery surfaces, and can shorten or stabilize stopping distances while preserving steerability.

Other terms listed don’t fit the idea of braking control: acuity refers to sharpness of vision, airborne pathogens are infectious agents, and ampere is a unit of electric current.