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

Ensure the recovery machine is properly grounded.

Answer

Verify the recovery cylinder has enough capacity for the entire system charge.

Answer

Purge the recovery machine and hoses with nitrogen.

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

Systems with less than 5 pounds of refrigerant can be vented.

Answer

The appliance owner must transport it to a certified disposal facility.

Answer

The refrigerant must be reclaimed before disposal.

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

Pressurize the system with compressed air to locate the leak.

Answer

Add dye to the system before recovery to pinpoint the leak.

Answer

Isolate the leaking component and recover from the rest of the system only.

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

Removing refrigerant from a system into an external container.

Answer

Cleaning refrigerant for reuse by separating oil and filtering it.

Answer

Transferring recovered refrigerant to a different system owned by the same person.

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

Change the oil in the vacuum pump.

Answer

Install a new filter-drier.

Answer

Warm the refrigerant in the system to vaporize any liquid.

Question 6

When using a system-dependent (passive) recovery process on a small appliance with an operating compressor, the technician should connect their recovery device to:

Accepted Answer

The high side only.

Answer

The low side only.

Answer

Both the high and low sides.

Answer

The liquid line service port.