Glossary “articulated vehicle” Definition:
Large trucks or buses with two or more wheeled units, so designed for ease of cornering.
a
articulation
Glossary “articulation” Definition:
1). The action of a chain joint in flexing from the straight to an angle and back to the straight as the joint passes around a sprocket or other path. 2). Vertical movement of the front driving or rear axle, relative to the frame of the vehicle to which they are attached. 3). Movement of the tie-rod end as the suspension moves through its range of travel.
ARPMDES
Glossary “ARPMDES” Definition:
Ancillary RPM Desired. RPM required to maintain the vehicle speed commanded by the SCCS inputs
aromatic
Glossary “aromatic” Definition:
Aromatics that are often used as diluents in acrylic lacquers. In gasoline aromatics are commonly used for the BTX group (benzene, toluene, xylene) and are hydrocarbons.
arm sets
Glossary “arm sets” Definition:
A resistance spot welding part that holds welding tips and conducts current to tips.
armature
Glossary “armature” Definition:
1). A part moved by magnetism. 2). A part moved through a magnetic field to produce current. 3). The rotating unit inside a DC generator or starter.
arming
Glossary “arming” Definition:
Placing an alarm system in readiness, enabling it to detect an illegal entry. Arming is accomplished when the ignition switch is turned off and the doors are locked. May also be accomplished using a key fob.
arming sensor
Glossary “arming sensor” Definition:
A device that places an alarm system into the “Ready Mode” to detect an illegal entry
armored ring groove
Glossary “armored ring groove” Definition:
A metal ring groove cast into a piston during manufacturing to increase resistance to wear.
arnoid gauge
Glossary “arnoid gauge” Definition:
An instrument used to align the center of a crankshaft journal with the centers of a crankshaft grinder.
architecture
Glossary “architecture” Definition:
The physical structure of a computer’s internal operations, including its registers, memory, instruction set, input/output structure.
arcing
Glossary “arcing” Definition:
1). Process of grinding or forming drum brake linings to conform to the drum diameter and provide clearance where needed. 2). Term that applies to the spark that occurs in an electrical circuit in an air gap, such as a spark plug.
arcing time
Glossary “arcing time” Definition:
Time elapsing from the severance of the circuit to the final interruption of current flow.
argon
Glossary “argon” Definition:
Inert gas used for shielding during welding.
arithmetic-logic unit
Glossary “arithmetic-logic unit” Definition:
A basic element of the central processing unit (CPU) in a computer. That portion of the CPU where arithmetic and logical operations are performed.
arm
Glossary “arm” Definition:
1). To turn on a theft-deterrent system. 2). Crankshaft throw. Also see long arm and short arm.
arc spraying
Glossary “arc spraying” Definition:
Thermal spraying process using an arc between two consumable electrodes of surfacing materials as a heat source, and a compressed gas to atomize and propel the surfacing material to the substrate.
arc welding
Glossary “arc welding” Definition:
Welding process that produces fusion of work pieces by heating them with an arc with or without the application of pressure and with or without filler metal.
arc gouging
Glossary “arc gouging” Definition:
A thermal gouging that uses an arc-cutting process to form a bevel or groove.
arc length
Glossary “arc length” Definition:
The distance from the tip of the welding electrode to the adjacent surface of the weld pool.