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).
DEFINITION of 'Natural Gas Liquids-NGL'. Components of natural gas that are separated from the gas state in the form of liquids. This separation occurs in a field facility or in a gas processing plant through absorption, condensation, adsorption or other method.Natural gas liquids as classified based on their vapor pressure:GL are naturally occurring elements found in natural gas, and include propane, butane and ethane, among others.