CFC Recovery Equipment & Techniques 3

Question 1

According to EPA Section 608, what is the required vacuum level before opening a system for non-major repairs on appliances with more than 200 pounds of refrigerant?

Accepted Answer

4 inches Hg vacuum

Answer

EPA regulations require a 4-inch Hg vacuum for appliances containing more than 200 pounds of refrigerant before opening for non-major repairs.

Question 2

Which of the following refrigerants requires recovery equipment to be certified to a HIGHER standard due to its flammability?

Accepted Answer

R-290 (propane)

Answer

R-290 (propane) is an A3 flammable refrigerant requiring equipment specifically rated for flammable refrigerant handling.

Question 3

When recovering a blend refrigerant such as R-410A, which method is MOST effective for recovering both liquid and vapor phases efficiently?

Accepted Answer

Liquid recovery from the high side followed by vapor recovery from the low side

Answer

Recovering liquid first from the high side, then vapor from the low side maximizes efficiency and maintains blend composition.

Question 4

A recovery cylinder bearing a yellow top and gray body is designated for use with:

Accepted Answer

Any recovered refrigerant

Answer

The standard yellow-top gray-body color coding designates a cylinder approved for recovered refrigerants of any type.

Question 5

What is the purpose of the two-stage recovery process used with large commercial systems?

Accepted Answer

To recover liquid refrigerant first for speed, then capture remaining vapor

Answer

The two-stage process recovers bulk liquid quickly, then uses the recovery machine to capture remaining low-pressure vapor.

(CFC) Chlorofluorocarbon Certification Practice Test

(CFC) Chlorofluorocarbon Certification Practice Test

CFC Recovery Equipment & Techniques 3