CFC Refrigerant Handling & Recovery Procedures 4

Question 1

What is the maximum cylinder fill level (by liquid volume) for a recovery cylinder containing R-22?

Accepted Answer

80%

Answer

Recovery cylinders must never be filled beyond 80% of their capacity by volume to allow for liquid expansion and prevent hydrostatic failure.

Question 2

Which document must accompany recovered refrigerant shipped to an EPA-certified reclaimer?

Accepted Answer

A hazardous materials shipping paper (bill of lading)

Answer

Recovered refrigerant shipped as a hazardous material must be accompanied by proper DOT hazardous materials shipping papers, including a bill of lading.

Question 3

A technician uses an electronic leak detector to find leaks before recovery. Which type of detector is BEST suited for detecting HFC refrigerants?

Accepted Answer

Heated diode detector

Answer

Heated diode (or infrared) detectors are the most sensitive and effective method for detecting HFC refrigerants in small concentrations.

Question 4

When recovering refrigerant from a system using a recovery machine, the technician should monitor which condition to know when recovery is complete for high-pressure refrigerants?

Accepted Answer

System pressure reaches 0 psig or the EPA recovery level

Answer

For high-pressure refrigerants, recovery is considered complete when system pressure reaches 0 psig or the applicable EPA-mandated recovery vacuum level.

Question 5

What is the primary reason a technician should not recover refrigerant into an oxygen cylinder, even an empty one?

Accepted Answer

Oxygen residue creates a violently reactive explosive hazard with refrigerant

Answer

Even trace oxygen residue in an oxygen cylinder creates an extremely explosive hazard when mixed with refrigerant under pressure.

(CFC) Chlorofluorocarbon Certification Practice Test

(CFC) Chlorofluorocarbon Certification Practice Test

CFC Refrigerant Handling & Recovery Procedures 4