refrigerant and recovery quiz

which of these is a flammable refrigerant,unacceptable under SNAP as a substitute for CFC-12

HC-12a

R 134a refrigerant must be reclaimed to meet which of these purity standards

j2099

before a container of a stored recycled refrigerant is used the container must be checked for

non condensable gases

alternative refrigerants use a unique set of service fittings that

prevent accidental mixing of refrigerants

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

SAE standards J2099 specifies that the maximum level of non-condensable gases in recycled R-134a should not exceed

1.5% by volume

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

R-1234yf refrigerant has a global warming potential (GWP) of

4

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

recovery equipment for R-134a refrigerant must meet standards set by

SAE

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 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

the reduction of ozone in the stratosphere could cause

an increase in skin cancer and eye cataracts

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

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

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

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

the epa allows the use of R-134a recovery only provided that the

equipment meets j2810 standards

empty disposable R-134a refrigerant containers should be

evacuated into recovery/recycling machine

Requirements for recovery/recycling/recharging equipment for R-1234yf refrigerant are set by SAE standard

j2843

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

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

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

technicians servicing an MVAC system should do any of these EXCEPT

store refrigerant in a disosable container

a container of recycled R-134a refrigerant that is being tested for non-condensable gases (air) should be

stored out of direct sunlight

the ozone layer filters out most of the suns harmful

ultraviolet radiation

which of these identifies a cylinder of R1234yf

white with red band

R-134a hoses are color-coded with a

black stripe

when service equipment hoses with manual shutoff valves are not connected to an A/C system, the valves should be in the

closed position

R-1234yf is a preferred refrigerant over R-134a because

it has a low GPW