Refrigerant Handling & Recovery Procedures Flashcards
7 cards from real CFC practice questions. Tap to flip, then mark Knew It or Still Learning — missed cards come back until you master them.
Read the first 7 Refrigerant Handling & Recovery Procedures flashcards as text
What is the maximum cylinder fill level (by liquid volume) for a recovery cylinder containing R-22?
Answer: 80%
Recovery cylinders must never be filled beyond 80% of their capacity by volume to allow for liquid expansion and prevent hydrostatic failure.
Which document must accompany recovered refrigerant shipped to an EPA-certified reclaimer?
Answer: A hazardous materials shipping paper (bill of lading)
Recovered refrigerant shipped as a hazardous material must be accompanied by proper DOT hazardous materials shipping papers, including a bill of lading.
A technician uses an electronic leak detector to find leaks before recovery. Which type of detector is BEST suited for detecting HFC refrigerants?
Answer: Heated diode detector
Heated diode (or infrared) detectors are the most sensitive and effective method for detecting HFC refrigerants in small concentrations.
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?
Answer: System pressure reaches 0 psig or the EPA recovery level
For high-pressure refrigerants, recovery is considered complete when system pressure reaches 0 psig or the applicable EPA-mandated recovery vacuum level.
What is the primary reason a technician should not recover refrigerant into an oxygen cylinder, even an empty one?
Answer: Oxygen residue creates a violently reactive explosive hazard with refrigerant
Even trace oxygen residue in an oxygen cylinder creates an extremely explosive hazard when mixed with refrigerant under pressure.
When is it permissible under EPA Section 608 to release refrigerant intentionally?
Answer: For de minimis releases that occur during good-faith recovery attempts
De minimis refrigerant releases that result from good-faith attempts to recover refrigerant are the only intentional releases permitted under EPA Section 608.
A technician recovers refrigerant and stores it in a cylinder with an expired retest date. What are the consequences under DOT regulations?
Answer: The cylinder cannot be legally transported on public roads
DOT regulations prohibit transporting refrigerant in cylinders that have exceeded their retest date, as the cylinder's structural integrity is unverified.