Refrigerant Recovery

What is the main reason for not venting refrigerants into the atmosphere?

• To prevent damage to the ozone layer

• To increase global warming

• To improve the efficiency of the system

• To reduce the cost of refrigerants

What are HCFCs and HFCs used for?

• As new forms of refrigerants

• As substitutes for CFCs

• For cleaning solvents

• All of the answer choices are correct

Refrigerant should be recovered as

• vapor first

• liquid first

• liquid from the low side first

• vapor from the low side first

Recovery speed can be increased by

• placing the recovery vessel in hot water

• placing the recovery vessel in ice water

• using an oversized recovery cylinder

• using longer hoses leading to the recovery tank

Tags

NGSS.HS-PS3-4

Why is it likely for recovery and recycling machines to overheat when drawing a deep vacuum?

• because a deep vacuum causes high head pressure

• because refrigerant is needed to cool the compressor

• because the refrigerant oil has evaporated

• a recovery and recycling machine would not overheat when drawing a deep vacuum

After removing refrigerant from a system, the refrigerant

• may be recycled and sold to another customer

• may be reused in the same system, or in another system owned by the same person

• may not be reused

• must be reclaimed

When using recovery and recycling equipment manufactured after November 15, 1993, technicians must evacuate an appliance containing more than 200 lb. of HCFC-22 to what level before making a major repair?

• 0 psig

• 4" Hg

• 10" Hg

• 30" Hg

Tags

NGSS.HS-ETS1-3

What is the primary purpose of refrigerant recovery in HVAC systems?

• To prevent environmental damage

• To increase cooling efficiency

• To reduce energy consumption

• To lower maintenance costs

Tags

NGSS.HS-ESS3-4

Which of the following is a common refrigerant used in recovery processes?

• R-134a

• R-22

• R-410A

• All of the above

Tags

NGSS.HS-PS3-4

During refrigerant recovery, why is it important to avoid mixing different types of refrigerants?

• It can cause chemical reactions

• It reduces the efficiency of recovery

• It complicates the recycling process

• All of the above