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).
PLL: Product Literature Library (Eaton) PLL: Passenger Legal Liability (insurance) PLL: Pollution Legal Liability: PLL: Polskie Linie Lotnicze (Polish Airways) PLL: Potential Loss of Life (risk assessment) PLL: Precision Lighting Ltd. (UK)