Â· 43 comments. in Facts. An intelligence quotient, or IQ, is a score derived from one of several standardized tests designed to assess intelligence. The abbreviation âIQâ comes from the German term Intelligenz-Quotient, originally coined by psychologist William Stern.
Lower explosive limit. Lower explosive limit (LEL): The lowest concentration (percentage) of a gas or a vapor in air capable of producing a flash of fire in presence of an ignition source (arc, flame, heat). The term is considered by many safety professionals to be the same as the lower flammable limit (LFL).
Lubrication Engineers offers a full line of high-performance industrial greases. Included in the LE grease line are technologically advanced, highly versatile, general purpose, multifunctional, and extreme pressure (EP) varieties, all of which outperform conventional greases. LE's industrial greases are formulated with a variety of thickener types, including lithium complex, calcium sulfonate, clay (bentone), and polyurea; and they come in a range of NLGI grades.