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Oxidizing Agent

The same as oxidizer.

Oxidizing Flame

An oxyfuel gas flame in which there is an excess of oxygen, resulting in metal vaporization.

Oxyacetylene Welding

An oxyfuel gas welding process that uses acetylene as the fuel gas.

Oxyfuel Gas Welding

A group of welding precesses, with or without a filler metal, that produces a merger of work pieces by heating them with an oxyfuel gas flame.

Oxyfuels Mandate

(Oxygenated Fuels Mandate) Common term used for a regulatory program that requires the addition of oxygenates (alcohols or ethers) to fuels during certain months to reduce tailpipe emissions of carbon monoxide.

Oxygen

A colorless, gaseous, tasteless element (O) that makes up 21% of the atmosphere.

Oxygen Cutting

The process of cutting metal at a high temperature with the chemical reaction of oxygen.

Oxygen Sensor

A device found in the exhaust manifold, which generates a small voltage dependent on the amount of oxygen present in the exhaust stream, used as a signal to the engine-control computer to determine the amount of fuel necessary to maintain a proper air/fuel ratio.

Oxygenate

In the petroleum industry a term used to denote octane components containing hydrogen, carbon, and oxygen in their molecular structure. Includes ethers such as MTBE and ETBE as well as alcohols such as ethanol and methanol.

Oxygenated Gasoline

Gasoline containing oxygenates such as ethanol or MTBE. Provides chemical enleanment of the A/F charge thereby improving combustion and reduci9ng tailpipe emissions of CO.

Oxygenerator

A term used for oxidizer.

Oz-in

Measurement of imbalance; 3 oz-in means that an object is out-of-balance to the degree that it would require a 1-oz weight placed 3 inches from the center of the rotating object or a 3-oz weight 1 inch form the center or any other combination that when multiplied equals 3 oz-in.

Ozone

1. A molecule of oxygen, an unstable pale-blue gas (O3), which is formed by the exposure of O2 to an electrical discharge or a reaction in sunlight. It has a penetrating and/or pungent odor and has a strong oxidizing effect. In the upper atmosphere, ozone protects the earth from the sun's ultraviolet rays. Though beneficial in the upper atmosphere, at ground level, ozone is a respiratory irritant and considered a pollutant. 2. An unstable molecule of oxygen with three atoms of oxygen instead of the normal two. Ozone oxidizes other elements and compounds by giving up its extra atom of oxygen easily.

Ozone Depletion

The reduction of the ozone layer due to contamination, such as the release of CFC refrigerants into the atmosphere.