hvac part 2, exam 3 100% UPDATED!

Azeotrope - ANSWERa blend of 2 or more components whose equilibrium vapor phase and liquid phase compositions are the same given pressure. Halocarbon - ANSWERa holgenated hydrocarbon containing one or more of the 3 halogens: fluorine, chlorine, and bromine. CFCs consist of __, __, and __. - ANSWERChlorine, fluorine, and carbon CFCs are chemically very stable because they contain no __. - ANSWERHydrogen CFCs are damaging the _ ozone layer. - ANSWERStratospheric Of the 3 common types of refrigerants _ has the highest high ODP. - ANSWERCFCs _ test methods are assumed by the EPA as the most effective methods for locating small leaks. - ANSWERElectronic and ultrasonic After evacuation of a system, if the pressure rises above ambient pressure, then _. - ANSWERtrapped refrigerant is boiling off. In cases where the refrigerant can't be reclaimed due to contamination with other refrigerants, the refrigerant _. - ANSWERmust be destroyed by incineration at an approved facitily The system vacuum gauge should be connected _. - ANSWERas close as possible to the system being evacuated Manufacture of CFCs will be banned after December 31, _. - ANSWER1995 A second catagory of refrigerants currently available is the HCFCs. They contain no chlorine but they contain _, which makes them chemically less stable ones they enter the atmosphere. - ANSWERhydrogen