A-B Operator Petro-Tech Practice Exam

Surface separation relies on gravity and density differences to pull apart immiscible fluids in produced streams. The three common configurations are two-phase separator, three-phase separator, and knock-out (drum) separators. A two-phase separator mainly removes gas from a liquid, letting the liquid settle while the gas can be routed elsewhere, giving a cleaner liquid output and a gas stream for further handling. A three-phase separator goes a step further by separating oil, water, and gas, so you can recover the oil, dispose or reuse the produced water, and manage the gas separately. A knock-out drum is a simple upstream vessel that gathers large volumes of gas and entrained droplets before the main processing train, reducing load on downstream equipment and protecting subsequent separators. Each stage lowers entrainment and conditions the streams for the next processing step. Other options describe different types of equipment not based on surface gravity separation: a distillation column separates by vapor-liquid equilibrium inside a column; an activated carbon bed adsorbs sulfur compounds; and a heat exchanger network focuses on energy transfer rather than separating phases.