CFC Recovery Equipment & Techniques 2

Question 1

What is the minimum required recovery efficiency for systems containing more than 200 pounds of refrigerant when using system-dependent (passive) recovery equipment?

Accepted Answer

90%

Answer

EPA regulations require 90% recovery efficiency for systems with more than 200 pounds of refrigerant using system-dependent equipment.

Question 2

Which type of recovery cylinder is specifically prohibited for use when recovering refrigerants?

Accepted Answer

Disposable cylinders originally used for refrigerant

Answer

Disposable (non-refillable) cylinders must never be reused for refrigerant recovery as they are not designed to withstand refilling pressures.

Question 3

When recovering refrigerant from a system with a severely contaminated compressor, the BEST practice is to:

Accepted Answer

Use a dedicated recovery machine with an oil separator

Answer

A recovery machine with an oil separator prevents contaminated oil and debris from damaging the recovery equipment and keeps the recovered refrigerant cleaner.

Question 4

What does a 'push-pull' recovery method accomplish that single-port recovery does not?

Accepted Answer

It speeds recovery by simultaneously pushing vapor from the high side and pulling from the low side

Answer

Push-pull recovery uses both high and low side ports simultaneously to accelerate refrigerant removal from the system.

Question 5

A technician notices the recovery machine is running but refrigerant flow has stopped and suction pressure has risen. The MOST likely cause is:

Accepted Answer

The recovery cylinder is full or the recovery machine is overheating

Answer

Rising suction pressure with no flow typically indicates the recovery cylinder is at capacity or the machine has shut down due to high discharge temperature.

(CFC) Chlorofluorocarbon Certification Practice Test

(CFC) Chlorofluorocarbon Certification Practice Test

CFC Recovery Equipment & Techniques 2