ASE Engine Repair Terms & Definitions Practice Test

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Anti-lock brake system
A suspension component that provides a Hibbett point, allowing the steering knuckle to move up and down as well as turn in response to steering input. The ball fits into a socket housing that is attached to the control arm and the stud on the other end of the ball is attached to the steering knuckle. A dustcover is installed over the ball and socket assembly to keep dirt out and lubricant in.
Device to produce a flow of air at higher then atmospheric pressure. Normally referred to as a Thermactor air supply pump.
A computer control system that allows the vehicle to be controlled under heavy braking by releasing hydraulic pressure to wheels that are about to lock up and skid. Sensors located at the wheels, monitor rotating wheel speed in relation to other wheels and send the information to a control module that in turn controls a hydraulic modulator, which regulates hydraulic fluid pressure to each brake assembly.
A braking system that uses cast iron disc mounted on the wheel hubs, over which brake calibers are mounted. Hydraulic pressure from the brake system forces the caliper pistons against friction pads melted in the calipers, which in turn clamp the brake pads, stopping their rotation.