EPA SECTION 609 FINAL PAPER
COMPLETE SOLUTIONS 2026 GRADED A+
⫸ R-12 refrigerant phase-out reason Answer: It contributed to depletion
of the earth's ozone layer.
⫸ Global Warming Potential (GWP) of R-1234yf Answer: 4
⫸ Prohibited practice when servicing MVAC systems Answer:
Intentionally venting refrigerant into the atmosphere.
⫸ Minimum time required for A/C system operation with fluorescent
dye for leak detection Answer: 15 minutes.
⫸ Refrigerant that is mildly flammable and requires specific safety
procedures Answer:
⫸ Safety equipment required when servicing MVAC systems Answer:
Safety goggles with side shields and insulated gloves.
⫸ What is cross contamination in MVAC systems ? Answer: Having
refrigerant other than the type designated on the system information
label
, ⫸ How often should refrigerant handling equipment be calibrated ?
Answer: According to manufacturer's specifications
⫸ What percentage of its gross weight capacity should a refrigerant
storage tank never exceed ? Answer: 60 %
⫸ When checking for evaporator leaks using an electronic detector ,
how long should you wait after turning off the blower ? Answer: 13
minutes
⫸ What is the proper procedure if contaminated refrigerant is detected ?
Answer: Dispose of it properly through EPA - certified facilities
⫸ Which document contains essential safety information about
refrigerants ? Answer: Safety Data Sheet ( SDS )
⫸ What is the minimum vacuum level required for R - 1234yf systems
before recharging ? Answer: 0.011 MPa A ( 3.32 in . Hg absolute )
⫸ How should refrigerant cylinders be stored ? Answer: Below 52
degrees C ( 125 degrees F )
⫸ What percentage of the total charge does a R - 1234yf system receive
initially during automated charging ? Answer: 15 %
COMPLETE SOLUTIONS 2026 GRADED A+
⫸ R-12 refrigerant phase-out reason Answer: It contributed to depletion
of the earth's ozone layer.
⫸ Global Warming Potential (GWP) of R-1234yf Answer: 4
⫸ Prohibited practice when servicing MVAC systems Answer:
Intentionally venting refrigerant into the atmosphere.
⫸ Minimum time required for A/C system operation with fluorescent
dye for leak detection Answer: 15 minutes.
⫸ Refrigerant that is mildly flammable and requires specific safety
procedures Answer:
⫸ Safety equipment required when servicing MVAC systems Answer:
Safety goggles with side shields and insulated gloves.
⫸ What is cross contamination in MVAC systems ? Answer: Having
refrigerant other than the type designated on the system information
label
, ⫸ How often should refrigerant handling equipment be calibrated ?
Answer: According to manufacturer's specifications
⫸ What percentage of its gross weight capacity should a refrigerant
storage tank never exceed ? Answer: 60 %
⫸ When checking for evaporator leaks using an electronic detector ,
how long should you wait after turning off the blower ? Answer: 13
minutes
⫸ What is the proper procedure if contaminated refrigerant is detected ?
Answer: Dispose of it properly through EPA - certified facilities
⫸ Which document contains essential safety information about
refrigerants ? Answer: Safety Data Sheet ( SDS )
⫸ What is the minimum vacuum level required for R - 1234yf systems
before recharging ? Answer: 0.011 MPa A ( 3.32 in . Hg absolute )
⫸ How should refrigerant cylinders be stored ? Answer: Below 52
degrees C ( 125 degrees F )
⫸ What percentage of the total charge does a R - 1234yf system receive
initially during automated charging ? Answer: 15 %
