Refrigerant Handling and Recovery Flashcards
6 cards from real Air Conditioning Repair practice questions. Tap to flip, then mark Knew It or Still Learning — missed cards come back until you master them.
Read the first 6 Refrigerant Handling and Recovery flashcards as text
A technician needs to recover R-410A from a residential split system. To prevent cross-contamination and ensure safety, what is the most critical first step before connecting the recovery machine?
Answer: Check the refrigerant type in the system and on the recovery cylinder.
Mixing different types of refrigerants in a recovery cylinder is dangerous and illegal. It can create a high-pressure, unpredictable mixture and makes the refrigerant impossible to reclaim. Therefore, always verify the system refrigerant matches the designated recovery cylinder before starting the recovery process.
When disposing of an appliance containing CFC, HCFC, or HFC refrigerant, EPA Section 608 regulations require that:
Answer: The refrigerant must be recovered by an EPA-certified technician.
Under EPA Section 608 of the Clean Air Act, it is mandatory for all refrigerant to be recovered from an appliance before its final disposal. This task must be performed by a technician who holds an EPA 608 certification.
A technician is recovering refrigerant from a system with a known leak. Which of the following is the correct practice?
Answer: Recover as much refrigerant as possible, reaching the required vacuum level.
Even if a system is known to be leaking, the technician is still responsible for recovering the refrigerant to the required EPA vacuum levels. Venting is illegal. After recovery, the leak can be located and repaired, often using an inert gas like nitrogen for pressure testing.
Which of the following defines the process of 'Reclamation' according to the EPA?
Answer: Processing used refrigerant to meet the purity standards for new refrigerant gas.
The EPA defines reclamation as the processing of used refrigerant to at least the purity level specified in AHRI Standard 700. This process must be done by an EPA-certified reclaimer and verifies the refrigerant meets the standards for new (virgin) product.
A technician is preparing to evacuate a system after a major repair. Before starting the vacuum pump, it is critical to:
Answer: Ensure the system pressure is at 0 psig or below.
A vacuum pump is designed to remove air and non-condensables from a system at very low pressures; it is not a recovery machine. Connecting a vacuum pump to a pressurized system can damage the pump and cause an illegal release of refrigerant into the atmosphere.
When using a system-dependent (passive) recovery process on a small appliance with an operating compressor, the technician should connect their recovery device to:
Answer: The high side only.
When the compressor is operational, it pushes the refrigerant into the high-pressure side of the system (condenser). Connecting to the high side takes advantage of the compressor's work to quickly and efficiently recover the refrigerant.