MLT-I Machinery Lubrication Terms
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2-Body Abrasion - ANS ✔A wear mechanism that occurs in sliding contacts where a hard surface
contacts a softer surface producing a cutting effect.
3-Body Abrasion - ANS ✔A wear mechanism that occurs when hard particles become trapped
between two surfaces in sliding contact producing a cutting effect.
Absolute Viscosity - ANS ✔The property of a fluid characterized by resistance to flow and
defined as the ratio of shear stress to the rate of shear of a fluid element.
Acid Number - ANS ✔The property that describes the acidity of a lubricating oil, expressed by
the mg of KOH required to neutralize the acid in one gram of sample. Increasing acid number is
often an indication of oxidation.
Additive - ANS ✔A substance added to lubricating oil to either improve desirable properties,
suppress undesirable properties, or impart new properties to the lubricant.
Adhesive Wear - ANS ✔A wear mechanism that occurs under boundary lubrication conditions
when surfaces of similar metallurgy contact under high pressure causing them to weld or
adhere to one another.
AGMA - ANS ✔American Gear Manufacturer's Association
Air Entrainment - ANS ✔Micro air bubbles suspended in oil.
, Air Release Test - ANS ✔A test that indicates a lubricating oil's ability to release entrained air. Air
is diffused into the oil sample for a given duration, then, the amount of time required for the
entrained air to fall to .2% is recorded.
Aniline Point - ANS ✔The lowest temperature at which oil is completely miscible with an equal
volume of analine. The test is used to express the solubility of the oil.
Anti-friction Bearing - ANS ✔A rolling element bearing (ball bearings, cylindrical roller, spherical
roller, etc.)
Antioxidant - ANS ✔An additive which inhibits oxidation of the lubricating oil.
Anti-wear Additive - ANS ✔Additives that adhere to machine surfaces, creating a friction and
wear reducing film.
API Base Oil Groups - ANS ✔A system of classification that categorizes all base oil types into one
of 5 categories.
API Service Category - ANS ✔A system of classification that identifies the performance and
specifications required for engine oil.
Ash Content - ANS ✔The amount of incombustible material in a lubricating oil.
ASTM - ANS ✔American Society for Testing Materials
Balanced Charge Agglomeration - ANS ✔A type of separation device that subjects oil to an
electric charge causing insoluble material to agglomerate so that it can be filtered from the oil.
questions well answered already
passed
2-Body Abrasion - ANS ✔A wear mechanism that occurs in sliding contacts where a hard surface
contacts a softer surface producing a cutting effect.
3-Body Abrasion - ANS ✔A wear mechanism that occurs when hard particles become trapped
between two surfaces in sliding contact producing a cutting effect.
Absolute Viscosity - ANS ✔The property of a fluid characterized by resistance to flow and
defined as the ratio of shear stress to the rate of shear of a fluid element.
Acid Number - ANS ✔The property that describes the acidity of a lubricating oil, expressed by
the mg of KOH required to neutralize the acid in one gram of sample. Increasing acid number is
often an indication of oxidation.
Additive - ANS ✔A substance added to lubricating oil to either improve desirable properties,
suppress undesirable properties, or impart new properties to the lubricant.
Adhesive Wear - ANS ✔A wear mechanism that occurs under boundary lubrication conditions
when surfaces of similar metallurgy contact under high pressure causing them to weld or
adhere to one another.
AGMA - ANS ✔American Gear Manufacturer's Association
Air Entrainment - ANS ✔Micro air bubbles suspended in oil.
, Air Release Test - ANS ✔A test that indicates a lubricating oil's ability to release entrained air. Air
is diffused into the oil sample for a given duration, then, the amount of time required for the
entrained air to fall to .2% is recorded.
Aniline Point - ANS ✔The lowest temperature at which oil is completely miscible with an equal
volume of analine. The test is used to express the solubility of the oil.
Anti-friction Bearing - ANS ✔A rolling element bearing (ball bearings, cylindrical roller, spherical
roller, etc.)
Antioxidant - ANS ✔An additive which inhibits oxidation of the lubricating oil.
Anti-wear Additive - ANS ✔Additives that adhere to machine surfaces, creating a friction and
wear reducing film.
API Base Oil Groups - ANS ✔A system of classification that categorizes all base oil types into one
of 5 categories.
API Service Category - ANS ✔A system of classification that identifies the performance and
specifications required for engine oil.
Ash Content - ANS ✔The amount of incombustible material in a lubricating oil.
ASTM - ANS ✔American Society for Testing Materials
Balanced Charge Agglomeration - ANS ✔A type of separation device that subjects oil to an
electric charge causing insoluble material to agglomerate so that it can be filtered from the oil.
