EPA 608 Study Material Including (Core, Type 1, 2 And 3) Questions With 100% Verified Solutions |

EPA 608 Study Material Including (Core, Type 1, 2 And 3) Questions With 100% Verified Solutions | MVAC systems are not classified as a type 1 appliance - ANSWER ... The EPA requires the certification of all technicians who service Type 1 air conditioning and refridgeration to comply with future changes in the law - ANSWER ... any regulated refridgerant released while filling a graduated charging cylinder - ANSWER must be recovered refridgerants should never be mixed together - ANSWER ... recovery cylinders must be DOT approved for use as a recovery cylinder and should be colored - ANSWER Gray with a Yellow top Floats, thermistor-type sensors, and weighing scales - ANSWER full-limit devices moisture will combine under heat with refridgerant and oil to form - ANSWER Hydrofluoric and hydrochloric acids as well as phosgene gas device installed at the outlet of the condenser to store the low temperature-high pressure liquid until it is needed by the evaporator. - ANSWER Receiver device installed in the liquid line to filter solid contaminants and remove moisture from the liquid refridgerant. - ANSWER Filter- drier certification of recovery machines - ANSWER November 15, 1993 CFC production stopped - ANSWER December 31, 1995 or January 1, 1996 no venting of substitute refridgerants - ANSWER November 1995 no more production of HCFC's - ANSWER 2030 low side (blue) - ANSWER suction high side (red) - ANSWER discharge freezer (ideal -17°f) - ANSWER low temperature Cooler (ideal-35°f) - ANSWER medium temperature Air conditioner (ideal-75°f) - ANSWER High temperature causes change of state, cannot be felt, cannot be measured with a thermometer, but does not cause a change in temperature. - ANSWER Latent Heat Causes a change in temperature, but not cause a change of state, can be measured with a thermometer - ANSWER Sensible Heat only vapor can be condensed - ANSWER ... only liquid can be subcooled - ANSWER ... heat transfer through fluid flow - ANSWER Convection heat transfer through a substance from molecule to molecule - ANSWER Conduction heat transfer through heat rays - ANSWER Radiation refridgerant recovery is 2 pounds per ton - ANSWER ... bacteria sets as 43°f - ANSWER ... open compressor is - ANSWER subject to leaking at the crankshaft heat added to refridgerant vapor that causes its temperature to rise above its saturartion temp - ANSWER Subheated refridgerant heat removed from the liquid refridgerant that causes its temperature to drop below its saturated temp - ANSWER Subcooling replacing or repairing the compressor, condenser, evaperator, heat exchanger or heat interchanger - ANSWER Major repairs appliances that have a hermetic compressor and hold 5 pounds or less (window units, domestic refridgerators, and freezer or under the counter ice maker - ANSWER Small sppliances system-dependent recovery devices may be used on type 2 equipment but cannot be used on any appliance with more than 15 pounds of refridgerant - ANSWER ... all nitrogen tanks should be equipped with a regulator to lower outlet pressure - ANSWER ... are typically charged with liquid through the evaporator charging valve - ANSWER Chillers