Cabin Atmosphere Control Systems Which of the following are characteristic of a chemical or solid state oxygen system? 1. An adjustable oxygen release rate. 2. A volume storage capacity about three times that of compressed oxygen. 3. The system generators are inert below 400°F even under severe impact. 4. A distribution and regulating system similar to gaseous oxygen systems. a. 2 & 3. b. 3 & 4. c. 1 & 2.