Refrigerant Handling and Certification

These flashcards cover key questions regarding refrigerant handling, safety, and certification standards.

What gas should be used to leak check a system designed for use with R-410A after major repairs?

Pressurized nitrogen (C)

Why should long hoses between the unit and the recovery machine be avoided?

They cause excessive pressure drop and increased recovery time (A).

Which factor does NOT affect the speed of evacuation?

The brand of micron gauge used (D).

Which of the following is NOT classified as an A3 (higher flammability) refrigerant?

HFO-1234yf (D).

Why should you not heat a refrigerant storage or recovery tank with an open flame?

Reclaimers will not accept visibly burned recovery tanks (A).

How should refrigerant cylinders be positioned when they are shipped?

Upright (B).

Which of the following does NOT meet the criteria for Type I appliance certification?

A dehumidifier that holds seven ounces of R-410A (D).