EPA 608 2023
- ✅✅-
✅✅
After a major repair, appliance should be dehydrated and evacuated to what
level for HFC with POE systems - -500 microns
✅✅
Are hydrocarbon refrigerants approved for retrofitting existing household
refrigerators? - -no
✅✅
As of 2017, how much is the fine for knowingly violating the Clean Air Act? -
-$44,539 per day
At high temperatures, what can happen to CFCs and HCFCs? - ✅✅-they
can decompose into phosgene gas, hydrochloric and/or hydrofluoric acids
best method of charging for nameplate of 80 pounds - ✅✅-weight through
the liquid line service valve
By what standard must Recovery Equipment be tested? - ✅✅-AHRI
Standard 740
can you use propane tanks normally used for grilling? - ✅✅-no, they contain
impurities that can damage equipment
Current regulated refrigerants -✅✅-CFC, HCFC, HFC, HFO
Effects of ozone depletion on hand - ✅✅-skin cancer and cataracts
Examples of HCs - ✅✅-r-600a isobutane
r-290 propane
✅✅-compressor to metering device
High side of refrigeration -
household appliances with HC refrigerants require what? - ✅✅-permanent
safety markings
How are high pressure refrigerants classified? -✅✅ -Having a pressure
between 155 and 340 psig at a liquid phase temperature of 104° F
examples: HCFC-22, HFC-404A, HFC-410A
, How are low pressure refrigerants classified? - ✅✅ -Having a pressure of 30
psig or lower at a liquid-phase temperature of 104° F
examples: CFC-11, HCFC-123, HFO-1233zd
How are medium pressure refrigerants classified? - ✅✅-Having a pressure
between 30 and 155 psig at a liquid-phase temperature of 104° F
examples: CFC-12, HCFC-124, HCFC-409A
How are refrigerants identified -✅✅-By type (CFC, HCFC, HFC, etc.) and
ASHRAE number or with "R" plus the number
How are very high pressure refrigerants classified? - ✅✅-Having a pressure
over 340 psig at a liquid phase temperature of 104° F
example: C02
how can non condensible gas be checked for? - ✅✅-using a pressure
temperature chart
How do you measure a final system vacuum - ✅✅-with system isolated and
vacuum pump turned off
how does ASHRAE classify refrigerant - ✅✅-Flammability and toxicity
A1 being safest, B3 being least safe
Flammability: 1, 2L, 2, 3
Toxicity: A, B
How is GWP calculated - ✅✅ -Carbon dioxide is used as a baseline
measurement with a value of 1, which is compared to other gases
How is ODP measured - ✅✅ -it is the ratio of the impact on ozone of a
chemical compared to that of a similar mass of cfc-11
✅✅
how long does a technician have to make repairs if an HCFC leak is found in a
supermarket - -a 30 day window
✅✅
how long does the owner have to repair an appliance once the leak rate hits
threshold? - -30 days
- ✅✅-
✅✅
After a major repair, appliance should be dehydrated and evacuated to what
level for HFC with POE systems - -500 microns
✅✅
Are hydrocarbon refrigerants approved for retrofitting existing household
refrigerators? - -no
✅✅
As of 2017, how much is the fine for knowingly violating the Clean Air Act? -
-$44,539 per day
At high temperatures, what can happen to CFCs and HCFCs? - ✅✅-they
can decompose into phosgene gas, hydrochloric and/or hydrofluoric acids
best method of charging for nameplate of 80 pounds - ✅✅-weight through
the liquid line service valve
By what standard must Recovery Equipment be tested? - ✅✅-AHRI
Standard 740
can you use propane tanks normally used for grilling? - ✅✅-no, they contain
impurities that can damage equipment
Current regulated refrigerants -✅✅-CFC, HCFC, HFC, HFO
Effects of ozone depletion on hand - ✅✅-skin cancer and cataracts
Examples of HCs - ✅✅-r-600a isobutane
r-290 propane
✅✅-compressor to metering device
High side of refrigeration -
household appliances with HC refrigerants require what? - ✅✅-permanent
safety markings
How are high pressure refrigerants classified? -✅✅ -Having a pressure
between 155 and 340 psig at a liquid phase temperature of 104° F
examples: HCFC-22, HFC-404A, HFC-410A
, How are low pressure refrigerants classified? - ✅✅ -Having a pressure of 30
psig or lower at a liquid-phase temperature of 104° F
examples: CFC-11, HCFC-123, HFO-1233zd
How are medium pressure refrigerants classified? - ✅✅-Having a pressure
between 30 and 155 psig at a liquid-phase temperature of 104° F
examples: CFC-12, HCFC-124, HCFC-409A
How are refrigerants identified -✅✅-By type (CFC, HCFC, HFC, etc.) and
ASHRAE number or with "R" plus the number
How are very high pressure refrigerants classified? - ✅✅-Having a pressure
over 340 psig at a liquid phase temperature of 104° F
example: C02
how can non condensible gas be checked for? - ✅✅-using a pressure
temperature chart
How do you measure a final system vacuum - ✅✅-with system isolated and
vacuum pump turned off
how does ASHRAE classify refrigerant - ✅✅-Flammability and toxicity
A1 being safest, B3 being least safe
Flammability: 1, 2L, 2, 3
Toxicity: A, B
How is GWP calculated - ✅✅ -Carbon dioxide is used as a baseline
measurement with a value of 1, which is compared to other gases
How is ODP measured - ✅✅ -it is the ratio of the impact on ozone of a
chemical compared to that of a similar mass of cfc-11
✅✅
how long does a technician have to make repairs if an HCFC leak is found in a
supermarket - -a 30 day window
✅✅
how long does the owner have to repair an appliance once the leak rate hits
threshold? - -30 days
