EPA 608 609 Core 3

Question 1

What is the difference between 'recovery' and 'recycling' of refrigerant?

Accepted Answer

Recovery removes refrigerant from a system; recycling cleans it by separating oil and passing through filter-driers

Answer

Recovery is simply removing refrigerant from a system, while recycling cleans it through oil separation and filtration.

Question 2

What does 'reclaiming' refrigerant require that recycling does not?

Accepted Answer

Reprocessing to meet ARI/AHRI 700 purity standards, usually at an off-site facility

Answer

Reclaimed refrigerant must be reprocessed and laboratory-verified to meet the AHRI 700 purity standard.

Question 3

When recovering refrigerant from a system with a non-condensable gas problem such as air, what is the recommended approach?

Accepted Answer

Recover the mixture and avoid releasing the non-condensables separately into the air

Answer

Technicians should not vent non-condensables; the mixture should be handled through proper recovery and recycling equipment.

Question 4

Liquid recovery is generally faster than vapor recovery primarily because:

Accepted Answer

A given volume of liquid contains far more refrigerant mass than the same volume of vapor

Answer

Liquid is much denser than vapor, so moving liquid transfers far more refrigerant per unit volume.

Question 5

To speed up the recovery process from a system, a technician may do all of the following EXCEPT:

Accepted Answer

Heat the recovery cylinder to raise its pressure above the system

Answer

The recovery cylinder should be cooled, not heated, to maintain a pressure difference that draws refrigerant in.

EPA 608 609 Practice Test