AND ANSWERS SURE A+
✔✔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
whos right - ✔✔Technician B only
✔✔SAE standard 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
who is right - ✔✔A only
✔✔A technician who's successfully completes the training and certification on an EPA-
approved section 609 program can be legally service MVAC systems that use any of
these refrigerants EXCEPT - ✔✔R-22
✔✔Electronic leak detectors for R-1234yf should meet - ✔✔J2913