EPA 608 Practice Test questions 2023 with correct answers

What is a blend of two or more components who's equilibrium vapor phase & liquid phase compositions are the same at a given pressure? Azeotrope This is a halogenated hydrocarbon containing one or more of the three halogens: fluorine, chlorine, and bromine Halocarbon Chlorofluorocarbons (CFCs) consist of? Chlorine, fluorine, carbon CFCs are chemically very stable because they contain no? Hydrogen CFCs are damaging to what layer of the ozone layer? Stratospheric Of the three common types of refrigerants this one has the highest ozone depletion potential (ODP) CFCs These test methods are assumed by the EPA as the most effective methods for locating the general area of small leaks Electronic and ultrasonic After recovery of a system, if the pressure rises above ambient pressure then what is most likely happening? Trapped refrigerant is probably boiling off In cases where the refrigerant cannot be reclaimed due to contamination with other refrigerants, what must be done to the refrigerant? Must be destroyed by incineration at an approved facility Where should the system vacuum gauge be connected? As close as possible to the system being evacuated Import of CFCs will be banned after December 31, what year? 1995 A second category of refrigerant is currently available which is hydrochlorofluorocarbons (HCFCs). Although they contain chlorine, which is damaging to the ozone layer, they also contain this which makes them chemically less stable once they enter the atmosphere. Hydrogen Under EPA's regulations, reclaimed refrigerant must meet what standards for purity before it can be resold? ARI-700 What type of recovery devices are so named because they depend on components of the system; that is, they capture refrigerant with the assistance of components in the air conditioning or refrigeration equipment as they are emptying. System dependent All devices used for refrigerant recovery must meet what standards? EPA What is one HCFC? R-22 Refrigerants that contain no chlorine at all are called? HFCs CH2FCF3 refrigerant is a? HFC Ozone in the stratosphere consist of molecules containing how many oxygen atoms? 3