HVAC Refrigerant Recovery and Handling 3

Question 1

What is the correct procedure when a recovery cylinder's pressure relief valve opens during the recovery process?

Accepted Answer

Stop recovery immediately, move the cylinder to a safe area, and notify the reclamation facility

Answer

A PRV opening indicates the cylinder is overpressurized or overheated, requiring immediate cessation of recovery and safe relocation of the cylinder.

Question 2

Which federal certification is required for technicians who purchase refrigerants in containers larger than 2 lbs?

Accepted Answer

EPA 608 certification

Answer

EPA Section 608 certification is federally required to purchase refrigerants in containers larger than 2 lbs.

Question 3

A technician is recovering R-410A from a system and notices the recovery machine is running hot and slowing down. What is the most likely cause?

Accepted Answer

The recovery cylinder is almost full

Answer

As a recovery cylinder fills, discharge pressure increases dramatically, causing the recovery machine to work harder, run hotter, and slow down.

Question 4

What does ARI Standard 700 specify for reclaimed refrigerants?

Accepted Answer

Minimum purity levels refrigerant must meet before it can be resold

Answer

ARI Standard 700 (now AHRI 700) establishes the purity specifications that reclaimed refrigerant must meet to be resold as 'like-new' quality.

Question 5

When must a technician perform refrigerant recovery before opening a system for repairs?

Accepted Answer

Always, regardless of refrigerant type or charge size

Answer

EPA Section 608 requires refrigerant recovery before opening ANY refrigerant-containing system, regardless of refrigerant type or charge size.

HVAC - Heating, Ventilation, and Air Conditioning Practice Test