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Terms Starting with W Y and Z



Waste spark-A spark occurring during the exhaust stroke on computerized ignition systems.

Wattage-A measure of the total power of an electrical circuit, calculated by multiplying the voltage in the circuit times the amperage in the circuit.

Watt’s Law-Power equals amperage times voltage (P = I x E).

Wheel cylinder-A device used to convert hydraulic fluid pressure to mechanical force for vehicle brakes.

Wheel speed sensor-A sensor on each wheel used to monitor speed in an antilock braking system.

Wheel spindle-The short shaft on the front wheel upon which the wheel bearings ride and to which the wheel is attached.

Work-Work is defined as the result of a force applied to a mass, moved a certain distance.  Work = Force x Distance.




Yoke-The Y-shaped metal device that is attached to the drive shaft.




Zener diode-A type of diode that requires a certain amount of voltage before it will conduct electricity.  This voltage is used to control transistors in voltage regulators.

Zerk-A lubrication fitting where grease is applied to a steering joint with a grease gun.

Zirconia-A chemical used in various ceramics, often used as an abrasive.

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