ABSTRACT
Q Q QA/QC: Quality assurance and quality control. QN Nipple: A high-pressure (10,000-15,000 psi) prole. N signies that it is a no-go design. qo: Flow rate or initial ¤ow rate. QRA: Qualitative risk assessment. Quad: An abbreviation for a quadrillion (1,000,000,000,000,000) Btu. For natural gas, roughly equivalent to one trillion (1,000,000,000,000) cubic feet, or 1 Tcf. Quali–ed Professional: A person that is knowledgeable in the principles and practices of stormwater management and treatment, such as a licensed professional engineer, licensed landscape architect, or other endorsed individual(s). Quality (Foam Stimulation Fluid): The percent of the total volume that the internal phase comprises. Quality (Product): A product providing utility without variability (Taguchi). Quartz: SiO2 mineral with a variety of crystal shapes. Quaternary: A geologic time period from present to 2 million years ago. Quaternary Ammonium: You are probably aware of the ammonium ion, NH4+. A molecule that is NR4+, where “R” is any carbon compound, is called a “quaternary ammonium” species. Quench Crack: A crack in steel resulting from stresses produced during transformation from austenite to martensite. Quench Hardening: Heat treating requiring austenitization followed by cooling, under conditions that austenite turns into martensite. Quenching Oil: An oil introduced into high-temperature process streams during rening to cool them. Quicklime: A granular material, composed primarily of calcium oxide (CaO) or calcium and magnesium oxide (MgO) and capable of slaking with water.
