EPA 608 Core practice test 2023-solved

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To process refrigerant to a level that is equal to new product specifications as - Answer- Reclaiming The low side test pressure data plate value should be used by a technician to determine a safe ... pressure for - Answer- Leak testing Silicone elastomers are not compatible with what refrigerant - Answer- HFC How many molecules does an ozone molecule contain? - Answer- 3 oxygen atoms Recover any remaining refrigerant and then render the cylinder useless, then recycle the metal is the proper disposal method for; - Answer- disposable cylinders Which refrigerant is an HCFC? - Answer- R-22 Which refrigerant is an HFC - Answer- R-410a Which refrigerant is a CFC - Answer- R-12 Which refrigerant has GWP of 1? - Answer- R-134a Reusable refrigerant containers that are normally under pressure above 15 psig, must be hydrostatically tested and date stamped every: - Answer- 5 years The compressor - Answer- changes a low pressure gas to a high pressure gas What changes high pressure gas to high pressure liquid - Answer- The condenser Crop loss, eye disease, and skin cancer have been attributed to; - Answer- Ozone depletion Which type of refrigerant contains no chlorine? - Answer- HFC/R-23 The three R's - Answer- Recover, Recycle, Reclaim Definition of recover? - Answer- remove refrigerant in any condition from an appliance and store it in an external container without necessarily testing or processing it in any way." Definition of recycle - Answer- —cleaning the recovered refrigerant. —by using oil separation —should only be used on the same owner's equipment . Definition of reclaim - Answer- complicated process, often performed by the manufacturer or a certified company which has the specialized machines needed Why is recovery important? - Answer- in order to protect the environment and human health. Depletion of ozone hurts crops, marine life and forests and causes eye problems and skin cancer. A refrigerant cylinder designed to hold recovered refrigerant are what colors - Answer- Grey body, Yellow top Before shipping used refrigerant cylinders it must meet - Answer- Department of Transportation standards What does ASHRAE stand for - Answer- American Society of Heating, Refrigerating and Air-Conditioning Engineers Which ASHRAE classification means slightly flammable - Answer- A2L Disposable cylinders are only used with what type of refrigerant? - Answer- Virgin refrigerant Recovery cylinder must not be filled above _____% of its capacity by weight - Answer- 80 Recovery cylinders must be hydrostatically tested and date stamped every how many years? - Answer- 5 When pressuring a system with nitrogen you should - Answer- Charge it through a regulator Insert a relief valve downstream line from the pressure regulator Never install in series Never pressurize a system with - Answer- Oxygen or compressed air It is Critical to inspect Schrader valve for? - Answer- Leaks bends cracks When moisture is present in a refrigeration system, it will react with the refrigerant and the oil to form ____. - Answer- Hydrochloric and hydrofluoric acid Does the EPA require leak repair for small appliances? - Answer- No furnace - Answer- the heating capacity of an HVAC system starts with the furnace. it represents the heart, pumping warmth to all the parts of your home through the ventilation. it takes up a lot of space & is Usually located in a basement or tucked away in a front hall closet heat exchanger - Answer- The heat exchanger is not part of the furnace. It's located inside the furnace, but the heat exchanger has its own capabilities. It adds heat to the incoming air from the combustion chamber. The evaporator coil - Answer- converts refrigerant from liqui [Show More]

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