ECME 100 Practice Exam

An ejector works by using a high-energy motive fluid to create suction and entrain another liquid. In pump systems, that motive fluid is typically steam or another compressed gas, which expands through a nozzle to form a fast jet. This jet transfers momentum to the surrounding liquid, pulling it into the flow and moving it along without any moving mechanical parts. Therefore, steam or gas is the driving energy. Electric energy or magnetic fields aren’t the driving force in a classic ejector, and the motive fluid isn’t limited to liquids.