EPA 608 study material including (Core, type 1, 2 and 3) Questions and Answers well Explained Latest 2024/2025 Update 100% Correct.

heat added to refridgerant vapor that causes its temperature to rise above its saturartion temp - Subheated refridgerant causes change of state, cannot be felt, cannot be measured with a thermometer, but does not cause a change in temperature. - Latent Heat a high capacity vacuum pump and short, large diameter hoses will - dramatically reduce emissions, pressure drop, and evacuation/dehydration time a vacum pump should be connected - as far away from the pump as possible according to the clean air act, no person installing, maintaining, repairing, or disposing of any appliance may knowingly vent or otherwise release into the environment and class 1 or class 2 substance after - July 1, 1992 Air conditioner (ideal-75°f) - High temperature all nitrogen tanks should be equipped with a regulator to lower outlet pressure - ... any device which contains and uses a class 1 or class 2 substance as a refridgerant and is used for household or commercial purpose. - appliance any regulated refridgerant released while filling a graduated charging cylinder - must be recovered appliances that have a hermetic compressor and hold 5 pounds or less (window units, domestic refridgerators, and freezer or under the counter ice maker - Small sppliancesare typically charged with liquid through the evaporator charging valve - Chillers as a general rule, different lubricants should never be mixed - ... ASHRAE standard 15 specifies the requirements and use of refridgerants sensors in equipment machine rooms - ASHRAE standard 15 requires equipment rooms to have refridgerant sensors for all refridgerant safety groups bacteria sets as 43°f - ... 35% or more in commercial refridgeration or industrial process equipment with 50 pounds of charge or more must be repaired - for appliances with 50 pounds of charge or more other than industrial process equipment and commercial refridgeration, an annual leak rate of 15% or more must be repaired before discarding a container the internal cylinder pressure should be reduced to at least - 0 psig Causes a change in temperature, but not cause a change of state, can be measured with a thermometer - Sensible Heat certification of recovery machines - November 15, 1993 CFC production stopped - December 31, 1995 or January 1, 1996 CFC's do not dissolve in water and do not breakdown into other compounds that dissolve in water - CFC's cannot be washed out of the lower atmosphere class 1 - CFC class 2 - HCFCCooler (ideal-35°f) - medium temperature Currently there is NOT a drop-in for CFC-12 - ... device installed at the outlet of the condenser to store the low temperature-high pressure liquid until it is needed by the evaporator. - Receiver device installed in the liquid line to filter solid contaminants and remove moisture from the liquid refridgerant. - Filter-drier equipment is pulled down to a deep vacuum, usually 1-mm hg - at the end of this check, the vacuum reading should not increase to more than 2.5 - mm hg a complicated distillation process that returns recovered refridgerant to the purity of factory fresh refridgerant. - Reclaiming (ARI Standard 700) Floats, thermistor-type sensors, and weighing scales - full-limit devices for small appliances, this service port typically is a straight piece of tubing that is entered using a - Piercing access valve freezer (ideal -17°f) - low temperature heat removed from the liquid refridgerant that causes its temperature to drop below its saturated temp - Sub-cooling heat transfer through a substance from molecule to molecule - Conduction heat transfer through fluid flow - Convection heat transfer through heat rays - RadiationHFC's will not damage the ozone in the stratosphere - ... high side (red) - discharge