Related Terms. Common boundary where direct contact between two different cultures, devices, entities, environments, systems, etc., occurs, and where energy, information, and/or material is exchanged. An electrical outlet or a telephone jack a common example of device interface.
Definition. Gas that at ambient temperature and pressure forms a flammable mixture with air at a concentration of 12 percent (or less) by volume.efinition. Gas that at ambient temperature and pressure forms a flammable mixture with air at a concentration of 12 percent (or less) by volume.
A gas is a substance which. ( 1 a) at 50 Â°C (122 Â°F) has a vapor pressure greater than 300 kPa or. ( 2 b) is completely gaseous at 20 Â°C (68 Â°F) at a standard pressure of 101.3 kPa. 3  Gases assigned to one of three divisions.  division 2.1 Flammable 1  gas. division 2.2 Non flammable, Non-toxic 2  gas. division 2.3 Toxic  gas.