Universal Flashcards

What is the minimum purity standard that recovered refrigerant must meet to be sold as 'reclaimed'?

Answer: ARI/AHRI Standard 700

Reclaimed refrigerant must be reprocessed to the purity specifications of AHRI Standard 700.

Which of these is a primary health hazard of breathing high concentrations of refrigerant vapor?

Answer: Cardiac sensitization and asphyxiation

High refrigerant concentrations displace oxygen and can sensitize the heart, risking asphyxiation and cardiac arrhythmia.

Refrigerant contacting skin can cause which injury due to its rapid evaporation?

Answer: Frostbite

Liquid refrigerant evaporates quickly and can freeze skin tissue, causing frostbite.

When recovering refrigerant into a non-refillable disposable cylinder, the technician should:

Answer: Never reuse it for recovery; it is for virgin refrigerant only

Disposable (DOT 39) cylinders are for one-time virgin refrigerant use and must not be refilled with recovered refrigerant.

What should be done with the small heel of refrigerant remaining in a disposable cylinder before disposal?

Answer: Recover it and render the cylinder empty/depressurized

Any remaining refrigerant must be recovered and the cylinder depressurized before the cylinder is discarded.

Which substance is an HFC refrigerant with zero ozone depletion potential?

Answer: R-134a

R-134a is a hydrofluorocarbon with no chlorine, giving it an ozone depletion potential of zero.

A refrigerant recovery cylinder used for mixed/contaminated refrigerant should be labeled and:

Answer: Sent to a reclaimer or for destruction

Contaminated or mixed refrigerant cannot be reused and must be sent to a certified reclaimer or destroyed.