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The efficiency with which a material radiates thermal energy, expressed as a fraction between 0 and 1.

Related Terms

ABRASION RESISTANCE

The ability of a material to resist surface wear.

DIELECTRIC STRENGTH

A measure of the ability of an insulating material to withstand electric stress (voltage) without failure. Fluids with high dielectric strength (usually expressed in volts or kilovolts) are good electrical insulators. (ASTM Designation D 877.)

ABSORPTION

The assimilation of one material into another; in petroleum refining, the use of an absorptive liquid to selectively remove components from a process stream.

CONTAMINANT FAILURE

Any loss of performance due to the presence of contamination. Two basic types of contamination failure are: Perceptible - gradual loss of efficiency or performance, and Catastrophic - dramatic, unexpected failure.

CARBON RESIDUE

Coked material remaining after an oil has been exposed to high temperatures under controlled conditions.

CONTAMINATION CONTROL

A broad subject which applies to all types of material systems (including both biological and engineering). It is concerned with planning, organizing, managing, and implementing all activities required to determine, achieve and maintain a specified contamination level.

DUNNAGE

Cushioning material placed among cargo to prevent their motion

BASE

A material which neutralizes acids. An oil additive containing colloidally dispersed metal carbonate, used to reduce corrosive wear.

ENVIRONMENTAL CONTAMINANT

All material and energy present in and around an operating system, such as dust, air moisture, chemicals, and thermal energy.

BUILT-IN-DIRT

Material passed into the effluent stream composed of foreign materials incorporated into the filter medium.
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