Free Air Conditioning Repair Refrigerant Handling and Recovery Questions and Answers

Question 1

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?

Accepted Answer

Check the refrigerant type in the system and on the recovery cylinder.

Answer

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.

Question 2

When disposing of an appliance containing CFC, HCFC, or HFC refrigerant, EPA Section 608 regulations require that:

Accepted Answer

The refrigerant must be recovered by an EPA-certified technician.

Answer

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.

Question 3

A technician is recovering refrigerant from a system with a known leak. Which of the following is the correct practice?

Accepted Answer

Recover as much refrigerant as possible, reaching the required vacuum level.

Answer

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.

Question 4

Which of the following defines the process of 'Reclamation' according to the EPA?

Accepted Answer

Processing used refrigerant to meet the purity standards for new refrigerant gas.

Answer

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.

Question 5

A technician is preparing to evacuate a system after a major repair. Before starting the vacuum pump, it is critical to:

Accepted Answer

Ensure the system pressure is at 0 psig or below.

Answer

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.

Air Conditioning Repair Practice Test

Air Conditioning Repair Practice Test

Free Air Conditioning Repair Refrigerant Handling and Recovery Questions and Answers