Refrigerant and recovery quiz with complete answers

Refrigerant and recovery quiz with complete answers the recovery process on an R-12 or R-134a A/C system should continue until a stable vacuum held by the system for 2 minutes technician a says that the refrigerant container should be placed in a cooler storage area before use technician b says that the vapor in the container should be slowly vented into a refrigerant handling unit b only the ozone layer filters out most of the suns harmful ultraviolet radiation the reduction of ozone in the stratosphere could cause an increase in skin cancer and eye cataracts technician a says that sunlight striking CFC molecules can cause chlorine to be released technician b says that chlorine atoms react with ozone to produce chlorine monoxide both a and b R 134a refrigerant must be reclaimed to meet which of these purity standards j2099 if the required charge level of refrigerant for MVAC system is 40 ounces which of these is correct charge level measured in pounds #number of ounces /16 2.50 technician a says that recover/recycling/recharging equipment for R-1234yf refrigerant requires integration with a refrigerant identifier technician b says that recovery/recycling/recharging equipment for R-1234yf refrigerant uses a 17mm O.D quick coupler on the low side service hose a only which of these identifies a cylinder of R1234yf white with red band a container of recycled R-134a refrigerant that is being tested for non-condensable gases (air) should be stored out of direct sunlight the epa allows the use of R-134a recovery only provided that the equipment meets j2810 standards technician a says that it is OK to use a disposable refrigerant tank to store recycled refrigerant technician b says that it is ok to fill an approved refrigerant tank to 70% of its gross weight rating who was right neither before a container of a stored recycled refrigerant is used the container must be checked for non condensable gases recovery equipment for R-134a refrigerant must meet standards set by SAE alternative refrigerants use a unique set of service fittings that prevent accidental mixing of refrigerants technician a says that R-744 refrigerant is accepted by the EPA as an alternative for retrofit technician b says that R-134a refrigerant is accepted by the EPA as an alternative for retrofit b only SAE standards J2099 specifies that the maximum level of non-condensable gases in recycled R-134a should not exceed 1.5% by volume when service equipment hoses with manual shutoff valves are not connected to an A/C system, the valves should be in the closed position technician a says that R-1234yf may be used to retrofit an R-134a system technician B says that R-1234yf is an ozone depleting gas neither a technician who successfully completes the training and certification in an EPA approved section 609 program can legally service MVAC systems that uses any of these refrigerants EXCEPT R-22 R-134a hoses are color-coded with a black stripe technicians servicing an MVAC system should do any of these EXCEPT store refrigerant in a disosable container Requirements for recovery/recycling/recharging equipment for R-1234yf refrigerant are set by SAE standard j2843 R-1234yf refrigerant has a global warming potential (GWP) of 4 R-1234yf is a preferred refrigerant over R-134a because it has a low GPW technician a says that SAE standard J639 spells out details for system design implementation and service technician b says that SAE standard J639 specifies refrigerant fitting type and size for each refrigerant a only technician a says that recovered refrigerant can be collected in disposable containers technician b says that recycled refrigerant can be stored in DOT CFR title 49 containers neither which of these is a flammable refrigerant,unacceptable under SNAP as a substitute for CFC-12 HC-12a technician a says that anyone servicing MVAC systems for hire must be trained and certified technician b says that each piece of refrigerant handling equipment that is used to service motor vehicle air conditioners must be approved and certified both are correct empty disposable R-134a refrigerant containers should be evacuated into recovery/recycling machine