CFC Refrigerant Handling & Recovery Procedures 3

Question 1

Which EPA-approved method allows a technician to check recovery cylinder pressure to determine if non-condensable gases are present?

Accepted Answer

Compare cylinder pressure to saturation pressure at ambient temperature

Answer

Non-condensables are indicated when cylinder pressure exceeds the saturation pressure of the refrigerant at the ambient temperature.

Question 2

When performing a push-pull recovery method, the vapor line from the system should connect to which port on the recovery machine?

Accepted Answer

The vapor inlet port

Answer

In push-pull recovery, vapor is drawn from the system through the vapor inlet of the recovery machine while liquid is pushed directly to the recovery cylinder.

Question 3

A technician is recovering refrigerant from a centrifugal chiller. What type of refrigerant does this equipment most commonly contain?

Accepted Answer

Low-pressure refrigerant like R-11 or R-123

Answer

Centrifugal chillers typically use low-pressure refrigerants such as R-11 or R-123, which operate below atmospheric pressure.

Question 4

What is the significance of the gross weight stamped on a recovery cylinder?

Accepted Answer

It is the combined tare weight plus maximum allowable refrigerant fill weight

Answer

The gross weight stamped on a recovery cylinder is the tare weight plus the maximum refrigerant the cylinder is rated to hold.

Question 5

Which of the following best describes the 'system-dependent' recovery process?

Accepted Answer

Relies on the refrigeration system's compressor to assist recovery

Answer

System-dependent (passive) recovery uses the refrigeration system's own compressor to move refrigerant into the recovery cylinder, requiring the system to be functional.

(CFC) Chlorofluorocarbon Certification Practice Test

(CFC) Chlorofluorocarbon Certification Practice Test

CFC Refrigerant Handling & Recovery Procedures 3