AG

Acronym for Air-guard.

AGA

Acronym for American Gas Association

AGC

Acronym for Automatic gain control.

Age harden

To use modified heat treatments at various temperatures over a period of time to harden and strengthen metal.

Age Hardening

A process of aging that increases hardness and strength, and ordinarily decreases ductility. Age hardening usually follows rapid cooling or cold working.

Ageing

See

• Aging

Agency

See

• Driver and Vehicle Licensing Agency
• Energy Protection Agency
• U.S. Environmental Protection Agency

Agent

1. An intermediary with legal authority to operate on behalf of the manufacturer.
2. A chemical substance with a designated purpose

Also see

• Activating agent
• Addition agent
• Air-entraining agent
• Anti-knock agent
• Bonding agent
• Curing Agents
• Degreasing agent
• Desiccant
• Drying Agent
• Oxidizing agent
• Plasticizer
• Reducing agent
• Release agent
• Rustproofing agent
• Softening agent

Agent fee

Although you can register your vehicle and obtain your license from a government office, some states and provinces permit an agent to perform that same service and allow the agent to collect an extra fee for the service. In this way the lineup at the government office is reduced.

Aggregate

1. Rock of specified quality and gradation.
2. Materials such as sand or chipped rock that are spread on paved roads to increase vehicle traction. Also called abrasives

Aggressive

A French expression to indicate the reinforced front, rear, and side safety structures of a vehicle. If the strengthened structure causes more than normal damage to another vehicle, a pedestrian, or the occupants of the vehicle, then that structure is aggressive.

Aggressive driving

A driving style in which the driver exceeds the speed limit, tailgates, weaves through traffic, fails to signal lane changes, fails to obey traffic signs and signals. May lead to or cause road rage.

Aging

1. The cracking, checking, or general deterioration produced by exposure of an adhesive, coating or sealer to the weather or some other given set of conditions for a length of time
2. The deterioration of rubber properties by oxidation over a period of time.
3. A change in the properties of some metals after heat treatment or cold working (i.e., hammering or bending when metal is cold).
4. The final stage of precipitation hardening, producing an increase in strength and hardness in metal alloys, due to precipitation of second phase particles from supersaturated solid solution over a period of days at room temperature, or several hours at an elevated temperature (called Artificial aging)
5. Loss of strength in the cladding or the pressure vessel in a nuclear reactor due to irradiation. Artificial aging would be the simulation of such processes by increasing the rate of irradiation to obtain information more rapidly
6. Change in the properties of a substance with time. A change in the magnetic properties of iron, e.g., increase of hysteresis loss of sheet-steel laminations; also the process whereby the subpermanent magnetism can be removed in the manufacture of permanent magnets

Agitation cup

A type of spray gun paint container which has an agitator.

Agitator

1. A device used to cause motion in confined fluid
2. A device for mixing paint by shaking the container.
3. A tank, usually cylindrical, which has a mixing device such as a propeller or airlift pump near the bottom. Finely ground mineral slurries (the aqueous component perhaps being a leaching solution) are exposed to appropriate chemicals for purpose of extraction of gold, uranium, or other valuable constituents. Types include pachuca tank or Brown agitator.

AGO

Acronym for Automotive gas oil.

AGR

Acronym for Advanced gas-cooled reactor.

Aground

See

• Hard aground

AGS

Acronym for Aircraft general standard.

AGVS

Acronym for Automated Guided Vehicle System.

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