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).
Mining Lubricants and Lubrication Equipment. Lubrication Engineers (LE) manufactures and markets a comprehensive line of premium lubricants ideal for use in extreme, heavily loaded mining applications. The LE range includes greases, gear oils, hydraulic oils, compressor oils, wire rope lubricants and a wide range of reliability equipment.