Today’s automation industry quiz question comes from ISA’s new course, Control Valve Mechanics and Operations from Analog to Digital. The class, which is offered June 22-26, takes a deep dive into the control valve’s mechanical composition, actuation and positioning accessories, including a detailed study of digital valve controllers. The class is hands-on and lab intensive, and is designed to offer a real-world, working knowledge of valve mechanical configurations, valve operations and positioner calibrations.
There is a two-stage phenomenon in liquid flow. The first step is the formation of voids and cavities within the liquid system when the line pressure falls below the vapor pressure. The second stage is the collapse or implosion of these cavities back into an all-liquid state when the line pressure recovers above the vapor pressure and this stage is called:
E) None of the above