CFC Refrigerant Handling & Recovery Procedures 5

Question 1

What is the purpose of the 'liquid recovery' method versus 'vapor recovery' when recovering refrigerant?

Accepted Answer

Liquid recovery is faster because it transfers refrigerant mass more quickly

Answer

Liquid recovery transfers refrigerant mass much faster than vapor recovery because liquid is denser, significantly reducing recovery time for large systems.

Question 2

Which of the following conditions would cause a recovery machine to short-cycle (rapid on/off cycling)?

Accepted Answer

A kinked recovery hose restricting refrigerant flow

Answer

A kinked or restricted recovery hose causes the recovery machine compressor to short-cycle because it cannot pull adequate refrigerant flow.

Question 3

Under EPA Section 608, technicians working on small appliances (less than 5 lbs of refrigerant) must use recovery equipment that captures at least what percentage of refrigerant?

Accepted Answer

90%

Answer

EPA requires recovery equipment certified to capture at least 90% of the refrigerant from small appliances before disposing of or opening the system.

Question 4

What does the term 'recycle' mean in the context of refrigerant handling, as distinct from 'reclaim'?

Accepted Answer

Recycle means cleaning refrigerant on-site using recovery/recycling equipment without full ARI 700 testing

Answer

Recycling cleans refrigerant through oil separation, filtration, and moisture removal on-site but does not certify it to ARI 700 purity standards like reclamation does.

Question 5

A technician recovering R-410A notices the recovery cylinder is getting hot to the touch during the process. What is the MOST likely cause?

Accepted Answer

The high heat of compression from the recovery machine is warming the cylinder

Answer

Heat from the recovery machine's compression process transfers to the recovery cylinder as refrigerant vapor is compressed and condensed into it, causing it to warm.

(CFC) Chlorofluorocarbon Certification Practice Test

(CFC) Chlorofluorocarbon Certification Practice Test

CFC Refrigerant Handling & Recovery Procedures 5