EPA 608 Questions and Answers Practice exam answered ()

The sale of reclaimed CFC, HCFC, HFC, and HFO refrigerants is_______. - correct answer Restricted to technicians who are EPA certified and refrigerant recovery A small Pliance is defined as a system that is - correct answer Manufactured, fully charged, and hermetically sealed in a factory with a charge of 5 pounds or less A __________ recovery device can be use for type 1 small appliance applications or type 2 applications if the total charge is below 15 pounds. - correct answer System dependent You must have a self-contained recovery machine available unless you only work on - correct answer Small appliances Recovery devices for use with small appliances must be capable of - correct answer Recovering 90% of the refrigerant when the compressor is operating The hydrocarbon refrigerant approved for retrofit into existing household refrigerators is - correct answer None. Hydrocarbons are not approved for any retrofit applications New household refrigerators with a charge of less than 57 grams (2 ounces weight) can use any of the following refrigerants, except. - correct answer R-1235yf And exempt refrigerant is any refrigerant that has a 0 Ozone depletion potential (0 ODP) any global warming potential (GWP) equal to or lower than carbon dioxide, that is a GWP of _________ or less. - correct answer 1 What is not a small appliance? - correct answer An MVAC-like system that holds 3 pounds of R-22 Any system with a charger less than ________ pounds can you system dependent recovery equipment. - correct answer 15 Anytime pressurized nitrogen is put into the system, the nitrogen gas - correct answer Maybe vented to the ambient air When a tank of mixed refrigerant is sent to a reclaimer, they can - correct answer Either refuse to except the refrigerant or charge extra for processing it A passive system dependent recovery process - correct answer Recovered refrigerant in a non-pressurized container What is the pressure of a storage cylinder of R-134A, that is stored in a room where the temperature is 100°F? - correct answer 124 PSIG What is the pressure of a storage cylinder of R-404A, that is stored in a room where the temperature is 100°F? - correct answer 237 psig Any refrigerant that is vented off the top of the charging cylinder - correct answer Must be recovered Recovery of refrigerant cannot begin if the initial pressure in the system is - correct answer 0 psig What is the pressure of the storage cylinder of R-410a, that is stored in a room where the temperature is 100°F? - correct answer 319 psig To reach the necessary recovery level, when using a ________, it will most likely be essential to heat and strike the compressor with a rubber mallet to release any refrigerant. - correct answer Passive recovery devices on a small appliance with a non-operating compressor You must know the ________ before beginning a refrigerant recovery. - correct answer Type of refrigerant that is in the system Nitrogen tanks should always be equipped with a ________. - correct answer Pressure regulator and pressure relief valve downstream of the regulator If a large leak of refrigerant occurs, __________. - correct answer Immediately vacate in naturally ventilate the area A very large refrigerant leak can cause Suffocation because refrigerants - correct answer Are heavier than air and displace oxygen Always _____________ when connecting or disconnecting refrigeration hoses. - correct answer 1.) wear safety eyewear and butyl-lined gloves 2.) verify the hoses are rated for the refrigerant being used 3.) avoid trapping liquid refrigerant in the hoses CFC and HCFC refrigerants can decompose to form - correct answer Hydrochloric and hydrofluoric acids