a standard, model, or pattern. 2. general level or average: Two cars per family is the norm in most suburban communities. 3. Education. a designated standard of average performance of people of a given age, background, etc. a standard based on the past average performance of a given individual.
For example, pressure regulators are used in gas grills to regulate propane, in home heating furnaces to regulate natural gases, in medical and dental equipment to regulate oxygen and anesthesia gases, in pneumatic automation systems to regulate compressed air, in engines to regulate fuel and in fuel cells to regulate hydrogen.
Describe the function of a scuba regulator first stage and second stage. The first stage regulator lowers the PSI from a high pressure to an intermediate pressure. The second stage regulator further lowers the pressure to an ambient pressure. A cylinder should be visually inspected at least ________ a year and hydrostatically tested every __________ years, in the United States.